fix(pkg/daemon): use measuredValue interface instead of different structs

pkg/config/flucky.go

@@ -225,7 +225,7 @@ func (c *Configuration) EnableSensor(name string) error {
 }
 
 // GetHumiditySensors returns a list of humidity sensors
-func (c *Configuration) GetHumiditySensors(option Option) []sensor.HumiditySensor {
+func (c *Configuration) GetHumiditySensors(option Option) []sensor.Sensor {
 	humiditySensors := c.getHumiditySensors()
 
 	switch option {
@@ -235,22 +235,22 @@ func (c *Configuration) GetHumiditySensors(option Option) []sensor.HumiditySenso
 				humiditySensors = append(humiditySensors[:i], humiditySensors[i+1:]...)
 			}
 		}
-		return c.convertHumiditySensors(humiditySensors)
+		return c.convertSensors(humiditySensors)
 	case DISABLED:
 		for i, humiditySensor := range humiditySensors {
 			if humiditySensor.SensorEnabled {
 				humiditySensors = append(humiditySensors[:i], humiditySensors[i+1:]...)
 			}
 		}
-		return c.convertHumiditySensors(humiditySensors)
+		return c.convertSensors(humiditySensors)
 	default:
-		return c.convertHumiditySensors(humiditySensors)
+		return c.convertSensors(humiditySensors)
 	}
 }
 
 // GetHumiditySensorsByName returns a list of temperature sensors by name,
 // uuid or wire-id
-func (c *Configuration) GetHumiditySensorsByName(names []string) []sensor.HumiditySensor {
+func (c *Configuration) GetHumiditySensorsByName(names []string) []sensor.Sensor {
 	configHumiditySensors := make(map[string]*types.Sensor, 0)
 
 	for _, name := range names {
@@ -271,7 +271,7 @@ func (c *Configuration) GetHumiditySensorsByName(names []string) []sensor.Humidi
 		humiditySensors = append(humiditySensors, cs)
 	}
 
-	return c.convertHumiditySensors(humiditySensors)
+	return c.convertSensors(humiditySensors)
 }
 
 func (c *Configuration) GetRGBLEDs(option Option) []rgbled.RGBLED {
@@ -320,7 +320,7 @@ func (c *Configuration) GetRGBLEDsByName(names []string) []rgbled.RGBLED {
 }
 
 // GetTemperatureSensors returns a list of temperature sensors
-func (c *Configuration) GetTemperatureSensors(option Option) []sensor.TemperatureSensor {
+func (c *Configuration) GetTemperatureSensors(option Option) []sensor.Sensor {
 	temperatureSensors := c.getTemperatureSensors()
 
 	switch option {
@@ -330,22 +330,22 @@ func (c *Configuration) GetTemperatureSensors(option Option) []sensor.Temperatur
 				temperatureSensors = append(temperatureSensors[:i], temperatureSensors[i+1:]...)
 			}
 		}
-		return c.convertTemperatureSensors(temperatureSensors)
+		return c.convertSensors(temperatureSensors)
 	case DISABLED:
 		for i, temperatureSensor := range temperatureSensors {
 			if temperatureSensor.SensorEnabled {
 				temperatureSensors = append(temperatureSensors[:i], temperatureSensors[i+1:]...)
 			}
 		}
-		return c.convertTemperatureSensors(temperatureSensors)
+		return c.convertSensors(temperatureSensors)
 	default:
-		return c.convertTemperatureSensors(temperatureSensors)
+		return c.convertSensors(temperatureSensors)
 	}
 }
 
 // GetTemperatureSensorsByName returns a list of temperature sensors by name,
 // uuid or wire-id
-func (c *Configuration) GetTemperatureSensorsByName(names []string) []sensor.TemperatureSensor {
+func (c *Configuration) GetTemperatureSensorsByName(names []string) []sensor.Sensor {
 	configTemperatureSensors := make(map[string]*types.Sensor, 0)
 
 	for _, name := range names {
@@ -366,7 +366,7 @@ func (c *Configuration) GetTemperatureSensorsByName(names []string) []sensor.Tem
 		temperatureSensors = append(temperatureSensors, cs)
 	}
 
-	return c.convertTemperatureSensors(temperatureSensors)
+	return c.convertSensors(temperatureSensors)
 }
 
 // RemoveRGBLED deletes a LED by its name or its unique UUID
@@ -431,22 +431,26 @@ func (c *Configuration) RenameSensor(oldName, newName string) error {
 	return fmt.Errorf("Could not find remote %v to replace into with %v", oldName, newName)
 }
 
-func (c *Configuration) convertHumiditySensors(sensors []*types.Sensor) []sensor.HumiditySensor {
-	humiditySensors := make([]sensor.HumiditySensor, 0)
+func (c *Configuration) convertSensors(sensors []*types.Sensor) []sensor.Sensor {
+	cachedSensors := make([]sensor.Sensor, 0)
 
 	for _, s := range sensors {
 		switch s.SensorModel {
 		case types.DHT11:
-			humiditySensors = append(humiditySensors, &sensor.DHT11{
+			cachedSensors = append(cachedSensors, &sensor.DHT11{
 				Sensor: s,
 			})
 		case types.DHT22:
-			humiditySensors = append(humiditySensors, &sensor.DHT22{
+			cachedSensors = append(cachedSensors, &sensor.DHT22{
+				Sensor: s,
+			})
+		case types.DS18B20:
+			cachedSensors = append(cachedSensors, &sensor.DS18B20{
 				Sensor: s,
 			})
 		}
 	}
-	return humiditySensors
+	return cachedSensors
 }
 
 func (c *Configuration) convertRGBLEDs(rgbLEDs []*types.RGBLED) []rgbled.RGBLED {
@@ -461,28 +465,6 @@ func (c *Configuration) convertRGBLEDs(rgbLEDs []*types.RGBLED) []rgbled.RGBLED
 	return leds
 }
 
-func (c *Configuration) convertTemperatureSensors(sensors []*types.Sensor) []sensor.TemperatureSensor {
-	temperatureSensors := make([]sensor.TemperatureSensor, 0)
-
-	for _, s := range sensors {
-		switch s.SensorModel {
-		case types.DHT11:
-			temperatureSensors = append(temperatureSensors, &sensor.DHT11{
-				Sensor: s,
-			})
-		case types.DHT22:
-			temperatureSensors = append(temperatureSensors, &sensor.DHT22{
-				Sensor: s,
-			})
-		case types.DS18B20:
-			temperatureSensors = append(temperatureSensors, &sensor.DS18B20{
-				Sensor: s,
-			})
-		}
-	}
-	return temperatureSensors
-}
-
 func (c *Configuration) getHumiditySensors() []*types.Sensor {
 	humiditySensors := make([]*types.Sensor, 0)
 	for _, s := range c.Sensors {

pkg/daemon/daemon.go

@@ -16,15 +16,11 @@ import (
 )
 
 // Start the daemon
-func Start(cnf *config.Configuration, cleanCacheInterval time.Duration, compression bool, degree types.TemperatureUnit, round float64, logger logger.Logger) {
+func Start(cnf *config.Configuration, cleanCacheInterval time.Duration, compression bool, logger logger.Logger) {
 
 	// Info
 	logger.Info("Use clean-cache-interval: %v", cleanCacheInterval.String())
 	logger.Info("Use compression: %v", compression)
-	logger.Info("Round values: %v", round)
-	logger.Info("Temperature unit: %v", degree)
-
-	temperatureLogfile := logfile.New(cnf.Device.TemperatureLogfile)
 
 	ticker := time.Tick(cleanCacheInterval)
 
@@ -32,16 +28,16 @@ func Start(cnf *config.Configuration, cleanCacheInterval time.Duration, compress
 	signal.Notify(interrupt, os.Interrupt, os.Kill, syscall.SIGTERM)
 
 	errorChannel := make(chan error, 0)
-	//humidityChannel := make(chan *types.Humidity, 0)
-	temperatureChannel := make(chan *types.Temperature, 0)
+	measuredValueChannel := make(chan types.MeasuredValue, 0)
 
 	ctx := context.Background()
 	childContext, cancel := context.WithCancel(ctx)
 
-	// go sensor.ReadHumiditiesContinuously(cnf.GetHumiditySensors(config.ENABLED), humidityChannel, errorChannel)
-	go sensor.ReadTemperaturesContinuously(childContext, cnf.GetTemperatureSensors(config.ENABLED), degree, round, temperatureChannel, errorChannel)
+	logfile := logfile.New(cnf)
 
-	temperatureCache := make([]*types.Temperature, 0)
+	measuredValuesCache := make([]types.MeasuredValue, 0)
+
+	go sensor.ReadContinuously(childContext, cnf.GetTemperatureSensors(config.ENABLED), measuredValueChannel, errorChannel)
 
 	rgbLEDs := cnf.GetRGBLEDs(config.ENABLED)
 
@@ -70,7 +66,7 @@ func Start(cnf *config.Configuration, cleanCacheInterval time.Duration, compress
 				logger.Error("Can not turn on blue info light: %v", err)
 			}
 
-			err = logfile.AppendTemperatures(temperatureLogfile, compression, temperatureCache)
+			err = logfile.Append(compression, measuredValuesCache)
 			if err != nil {
 
 				err = rgbled.Error(rgbLEDs)
@@ -81,10 +77,10 @@ func Start(cnf *config.Configuration, cleanCacheInterval time.Duration, compress
 				cancel()
 				logger.Fatal("Can not save temperatures: %v", err)
 			}
-			temperatureCache = make([]*types.Temperature, 0)
+			measuredValuesCache = make([]types.MeasuredValue, 0)
 
-		case temperature, _ := <-temperatureChannel:
-			temperatureCache = append(temperatureCache, temperature)
+		case measuredValue, _ := <-measuredValueChannel:
+			measuredValuesCache = append(measuredValuesCache, measuredValue)
 
 		case killSignal := <-interrupt:
 			logger.Warn("Daemon was interruped by system signal %v\n", killSignal)
@@ -96,8 +92,8 @@ func Start(cnf *config.Configuration, cleanCacheInterval time.Duration, compress
 				logger.Error("Can not turn on red info light: %v", err)
 			}
 
-			logger.Warn("Save remaining temperature data from the cache")
-			err = logfile.AppendTemperatures(temperatureLogfile, compression, temperatureCache)
+			logger.Warn("Save remaining data from the cache: %v", len(measuredValuesCache))
+			err = logfile.Append(compression, measuredValuesCache)
 			if err != nil {
 				logger.Fatal("%v", err)
 			}

pkg/internal/collect/measuredValues.go

@@ -0,0 +1,20 @@
+package collect
+
+import (
+	"github.com/go-flucky/flucky/pkg/types"
+)
+
+func MeasuredValues(measuredValueChannel <-chan types.MeasuredValue) []types.MeasuredValue {
+	cachedMeasuredValues := make([]types.MeasuredValue, 0)
+	for {
+		select {
+		case measuredValue, more := <-measuredValueChannel:
+			if more {
+				cachedMeasuredValues = append(cachedMeasuredValues, measuredValue)
+				continue
+			}
+		default:
+			return cachedMeasuredValues
+		}
+	}
+}

pkg/internal/collect/temperatures.go

@@ -1,20 +0,0 @@
-package collect
-
-import (
-	"github.com/go-flucky/flucky/pkg/types"
-)
-
-func Temperatures(temperatureChannel <-chan *types.Temperature) []*types.Temperature {
-	temperatureList := make([]*types.Temperature, 0)
-	for {
-		select {
-		case temperature, more := <-temperatureChannel:
-			if more {
-				temperatureList = append(temperatureList, temperature)
-				continue
-			}
-		default:
-			return temperatureList
-		}
-	}
-}

pkg/logfile/csv.go

@@ -1,187 +1,175 @@
 package logfile
 
-import (
-	"encoding/csv"
-	"encoding/json"
-	"fmt"
-	"os"
-	"strconv"
-	"time"
+// type csvLogfile struct {
+// 	logfile string
+// }
 
-	"github.com/go-flucky/flucky/pkg/sensor"
-	"github.com/go-flucky/flucky/pkg/types"
-)
+// func (cl *csvLogfile) GetLogfile() string {
+// 	return cl.logfile
+// }
 
-type csvLogfile struct {
-	logfile string
-}
+// func (cl *csvLogfile) ReadHumidities() ([]*types.Humidity, error) {
+// 	if _, err := os.Stat(cl.logfile); os.IsNotExist(err) {
+// 		return nil, fmt.Errorf("%v: %v", errorLogfileNotFound, cl.logfile)
+// 	}
 
-func (cl *csvLogfile) GetLogfile() string {
-	return cl.logfile
-}
+// 	humidities := make([]*types.Humidity, 0)
 
-func (cl *csvLogfile) ReadHumidities() ([]*types.Humidity, error) {
-	if _, err := os.Stat(cl.logfile); os.IsNotExist(err) {
-		return nil, fmt.Errorf("%v: %v", errorLogfileNotFound, cl.logfile)
-	}
+// 	f, err := os.Open(cl.logfile)
+// 	if err != nil {
+// 		return nil, fmt.Errorf("%v: %v", errorLogfileOpen, cl.logfile)
+// 	}
+// 	defer f.Close()
 
-	humidities := make([]*types.Humidity, 0)
+// 	jsonDecoder := json.NewDecoder(f)
+// 	err = jsonDecoder.Decode(&humidities)
+// 	if err != nil {
+// 		return nil, fmt.Errorf("%v: %v", errorLogfileDecode, err)
+// 	}
 
-	f, err := os.Open(cl.logfile)
-	if err != nil {
-		return nil, fmt.Errorf("%v: %v", errorLogfileOpen, cl.logfile)
-	}
-	defer f.Close()
+// 	return humidities, nil
+// }
 
-	jsonDecoder := json.NewDecoder(f)
-	err = jsonDecoder.Decode(&humidities)
-	if err != nil {
-		return nil, fmt.Errorf("%v: %v", errorLogfileDecode, err)
-	}
+// func (cl *csvLogfile) ReadTemperatures() ([]*types.Temperature, error) {
 
-	return humidities, nil
-}
+// 	if _, err := os.Stat(cl.logfile); os.IsNotExist(err) {
+// 		return nil, fmt.Errorf("%v %v: %v", errorLogfileNotFound, cl.logfile, err)
+// 	}
 
-func (cl *csvLogfile) ReadTemperatures() ([]*types.Temperature, error) {
+// 	temperatures := make([]*types.Temperature, 0)
 
-	if _, err := os.Stat(cl.logfile); os.IsNotExist(err) {
-		return nil, fmt.Errorf("%v %v: %v", errorLogfileNotFound, cl.logfile, err)
-	}
+// 	f, err := os.Open(cl.logfile)
+// 	if err != nil {
+// 		return nil, fmt.Errorf("%v %v: %v", errorLogfileOpen, cl.logfile, err)
+// 	}
+// 	defer f.Close()
 
-	temperatures := make([]*types.Temperature, 0)
+// 	r := csv.NewReader(f)
+// 	records, err := r.ReadAll()
+// 	if err != nil {
+// 		return nil, fmt.Errorf("%v %v: %v", errorLogfileDecode, cl.logfile, err)
+// 	}
 
-	f, err := os.Open(cl.logfile)
-	if err != nil {
-		return nil, fmt.Errorf("%v %v: %v", errorLogfileOpen, cl.logfile, err)
-	}
-	defer f.Close()
+// 	for _, record := range records {
+// 		times := make([]time.Time, 0)
+// 		for _, j := range []int{3, 4} {
+// 			time, err := time.Parse(timeFormat, record[j])
+// 			if err != nil {
+// 				return nil, fmt.Errorf("%v %v: %v", errorParseTime, record[j], err)
+// 			}
+// 			times = append(times, time)
+// 		}
 
-	r := csv.NewReader(f)
-	records, err := r.ReadAll()
-	if err != nil {
-		return nil, fmt.Errorf("%v %v: %v", errorLogfileDecode, cl.logfile, err)
-	}
+// 		temperatureValue, err := strconv.ParseFloat(record[1], 64)
+// 		if err != nil {
+// 			return nil, fmt.Errorf("%v %v: %v", errorParseFloat, record[1], err)
+// 		}
 
-	for _, record := range records {
-		times := make([]time.Time, 0)
-		for _, j := range []int{3, 4} {
-			time, err := time.Parse(timeFormat, record[j])
-			if err != nil {
-				return nil, fmt.Errorf("%v %v: %v", errorParseTime, record[j], err)
-			}
-			times = append(times, time)
-		}
+// 		measurementUnit, err := sensor.SelectTemperatureMeasurementUnit(record[2])
+// 		if err != nil {
+// 			return nil, fmt.Errorf("%v %v: %v", errorParseMeasurementUnit, record[2], err)
+// 		}
 
-		temperatureValue, err := strconv.ParseFloat(record[1], 64)
-		if err != nil {
-			return nil, fmt.Errorf("%v %v: %v", errorParseFloat, record[1], err)
-		}
+// 		temperature := &types.Temperature{
+// 			TemperatureID:       record[0],        // 0
+// 			TemperatureValue:    temperatureValue, // 1
+// 			TemperatureUnit:     measurementUnit,  // 2
+// 			TemperatureFromDate: times[0],         // 3
+// 			TemperatureTillDate: times[1],         // 4
+// 			SensorID:            record[5],        // 5
+// 		}
 
-		measurementUnit, err := sensor.SelectTemperatureMeasurementUnit(record[2])
-		if err != nil {
-			return nil, fmt.Errorf("%v %v: %v", errorParseMeasurementUnit, record[2], err)
-		}
+// 		// Creation date
+// 		temperatureCreationDate, err := time.Parse(timeFormat, record[6])
+// 		if err != nil {
+// 			return nil, fmt.Errorf("%v %v: %v", errorParseTime, record[5], err)
+// 		}
+// 		temperature.CreationDate = &temperatureCreationDate
 
-		temperature := &types.Temperature{
-			TemperatureID:       record[0],        // 0
-			TemperatureValue:    temperatureValue, // 1
-			TemperatureUnit:     measurementUnit,  // 2
-			TemperatureFromDate: times[0],         // 3
-			TemperatureTillDate: times[1],         // 4
-			SensorID:            record[5],        // 5
-		}
+// 		if record[7] != "" {
+// 			temperatureUpdateDate, err := time.Parse(timeFormat, record[7])
+// 			if err != nil {
+// 				return nil, fmt.Errorf("%v %v: %v", errorParseTime, record[7], err)
+// 			}
 
-		// Creation date
-		temperatureCreationDate, err := time.Parse(timeFormat, record[6])
-		if err != nil {
-			return nil, fmt.Errorf("%v %v: %v", errorParseTime, record[5], err)
-		}
-		temperature.CreationDate = &temperatureCreationDate
+// 			temperature.UpdateDate = &temperatureUpdateDate
+// 		}
 
-		if record[7] != "" {
-			temperatureUpdateDate, err := time.Parse(timeFormat, record[7])
-			if err != nil {
-				return nil, fmt.Errorf("%v %v: %v", errorParseTime, record[7], err)
-			}
+// 		temperatures = append(temperatures, temperature)
+// 	}
 
-			temperature.UpdateDate = &temperatureUpdateDate
-		}
+// 	return temperatures, nil
+// }
 
-		temperatures = append(temperatures, temperature)
-	}
+// func (cl *csvLogfile) WriteHumidities(humidities []*types.Humidity) error {
 
-	return temperatures, nil
-}
+// 	f, err := os.Create(cl.logfile)
+// 	if err != nil {
+// 		return fmt.Errorf("%v: %v", errorLogfileCreate, cl.logfile)
+// 	}
+// 	defer f.Close()
 
-func (cl *csvLogfile) WriteHumidities(humidities []*types.Humidity) error {
+// 	w := csv.NewWriter(f)
 
-	f, err := os.Create(cl.logfile)
-	if err != nil {
-		return fmt.Errorf("%v: %v", errorLogfileCreate, cl.logfile)
-	}
-	defer f.Close()
+// 	for _, humidity := range humidities {
+// 		w.Write([]string{
+// 			fmt.Sprintf("%v", humidity.HumidityID),
+// 			fmt.Sprintf("%v", humidity.HumidityValue),
+// 			fmt.Sprintf("%v", humidity.HumidityFromDate.Format(timeFormat)),
+// 			fmt.Sprintf("%v", humidity.HumidityTillDate.Format(timeFormat)),
+// 			fmt.Sprintf("%v", humidity.SensorID),
+// 			fmt.Sprintf("%v", humidity.CreationDate.Format(timeFormat)),
+// 			fmt.Sprintf("%v", humidity.UpdateDate.Format(timeFormat)),
+// 		})
+// 	}
 
-	w := csv.NewWriter(f)
+// 	w.Flush()
 
-	for _, humidity := range humidities {
-		w.Write([]string{
-			fmt.Sprintf("%v", humidity.HumidityID),
-			fmt.Sprintf("%v", humidity.HumidityValue),
-			fmt.Sprintf("%v", humidity.HumidityFromDate.Format(timeFormat)),
-			fmt.Sprintf("%v", humidity.HumidityTillDate.Format(timeFormat)),
-			fmt.Sprintf("%v", humidity.SensorID),
-			fmt.Sprintf("%v", humidity.CreationDate.Format(timeFormat)),
-			fmt.Sprintf("%v", humidity.UpdateDate.Format(timeFormat)),
-		})
-	}
+// 	return nil
+// }
 
-	w.Flush()
+// func (cl *csvLogfile) WriteTemperatures(temperatures []*types.Temperature) error {
+// 	f, err := os.Create(cl.logfile)
+// 	if err != nil {
+// 		return fmt.Errorf("%v: %v", errorLogfileCreate, cl.logfile)
+// 	}
+// 	defer f.Close()
 
-	return nil
-}
+// 	writeCreationDate(temperatures)
 
-func (cl *csvLogfile) WriteTemperatures(temperatures []*types.Temperature) error {
-	f, err := os.Create(cl.logfile)
-	if err != nil {
-		return fmt.Errorf("%v: %v", errorLogfileCreate, cl.logfile)
-	}
-	defer f.Close()
+// 	w := csv.NewWriter(f)
 
-	writeCreationDate(temperatures)
+// 	for _, temperature := range temperatures {
+// 		record := make([]string, 0)
 
-	w := csv.NewWriter(f)
+// 		if temperature.UpdateDate != nil {
+// 			record = []string{
+// 				fmt.Sprintf("%v", temperature.TemperatureID),
+// 				fmt.Sprintf("%v", temperature.TemperatureValue),
+// 				fmt.Sprintf("%v", temperature.TemperatureUnit),
+// 				fmt.Sprintf("%v", temperature.TemperatureFromDate.Format(timeFormat)),
+// 				fmt.Sprintf("%v", temperature.TemperatureTillDate.Format(timeFormat)),
+// 				fmt.Sprintf("%v", temperature.SensorID),
+// 				fmt.Sprintf("%v", temperature.CreationDate.Format(timeFormat)),
+// 				fmt.Sprintf("%v", temperature.UpdateDate.Format(timeFormat)),
+// 			}
+// 		} else {
+// 			record = []string{
+// 				fmt.Sprintf("%v", temperature.TemperatureID),
+// 				fmt.Sprintf("%v", temperature.TemperatureValue),
+// 				fmt.Sprintf("%v", temperature.TemperatureUnit),
+// 				fmt.Sprintf("%v", temperature.TemperatureFromDate.Format(timeFormat)),
+// 				fmt.Sprintf("%v", temperature.TemperatureTillDate.Format(timeFormat)),
+// 				fmt.Sprintf("%v", temperature.SensorID),
+// 				fmt.Sprintf("%v", temperature.CreationDate.Format(timeFormat)),
+// 				fmt.Sprintf(""),
+// 			}
+// 		}
 
-	for _, temperature := range temperatures {
-		record := make([]string, 0)
+// 		w.Write(record)
+// 	}
 
-		if temperature.UpdateDate != nil {
-			record = []string{
-				fmt.Sprintf("%v", temperature.TemperatureID),
-				fmt.Sprintf("%v", temperature.TemperatureValue),
-				fmt.Sprintf("%v", temperature.TemperatureUnit),
-				fmt.Sprintf("%v", temperature.TemperatureFromDate.Format(timeFormat)),
-				fmt.Sprintf("%v", temperature.TemperatureTillDate.Format(timeFormat)),
-				fmt.Sprintf("%v", temperature.SensorID),
-				fmt.Sprintf("%v", temperature.CreationDate.Format(timeFormat)),
-				fmt.Sprintf("%v", temperature.UpdateDate.Format(timeFormat)),
-			}
-		} else {
-			record = []string{
-				fmt.Sprintf("%v", temperature.TemperatureID),
-				fmt.Sprintf("%v", temperature.TemperatureValue),
-				fmt.Sprintf("%v", temperature.TemperatureUnit),
-				fmt.Sprintf("%v", temperature.TemperatureFromDate.Format(timeFormat)),
-				fmt.Sprintf("%v", temperature.TemperatureTillDate.Format(timeFormat)),
-				fmt.Sprintf("%v", temperature.SensorID),
-				fmt.Sprintf("%v", temperature.CreationDate.Format(timeFormat)),
-				fmt.Sprintf(""),
-			}
-		}
+// 	w.Flush()
 
-		w.Write(record)
-	}
-
-	w.Flush()
-
-	return nil
-}
+// 	return nil
+// }

pkg/logfile/errors.go

@@ -22,3 +22,5 @@ var errorNoValidSensorID = errors.New("No sensor id detected or available")
 var errorNoValidTemperatureID = errors.New("No valid temperature id detected or available")
 var errorNoValidTime = errors.New("No time detected or available")
 var errorNoValidTimePeriods = errors.New("No valid time periods")
+
+var errorTypeSwitch = errors.New("Can not detect type via type switch")

pkg/logfile/interfaces.go

@@ -5,9 +5,9 @@ import (
 )
 
 type Logfile interface {
-	GetLogfile() string
-	ReadHumidities() ([]*types.Humidity, error)
-	ReadTemperatures() ([]*types.Temperature, error)
-	WriteHumidities(humidities []*types.Humidity) error
-	WriteTemperatures(temperatures []*types.Temperature) error
+	Append(compression bool, measuredValues []types.MeasuredValue) error
+	Read() ([]types.MeasuredValue, error)
+	// ReadCustom(r io.Reader) ([]types.MeasuredValue, error)
+	Write(measuredValues []types.MeasuredValue) error
+	// WriteCustom(w io.Writer, measuredValues []types.MeasuredValue) error
 }

pkg/logfile/json.go

@@ -3,68 +3,162 @@ package logfile
 import (
 	"encoding/json"
 	"fmt"
+	"log"
 	"os"
+	"sync"
+
+	"github.com/go-flucky/flucky/pkg/internal/collect"
+	"github.com/go-flucky/flucky/pkg/internal/prittyprint"
+
+	"github.com/go-flucky/flucky/pkg/config"
 
 	"github.com/go-flucky/flucky/pkg/types"
 )
 
 type jsonLogfile struct {
-	logfile string
+	cnf *config.Configuration
 }
 
-func (jl *jsonLogfile) GetLogfile() string {
-	return jl.logfile
+func (jl *jsonLogfile) Append(compression bool, measuredValues []types.MeasuredValue) error {
+
+	allMeasuredValues, err := jl.Read()
+	if err != nil {
+		return err
+	}
+
+	log.Println(len(allMeasuredValues))
+
+	allMeasuredValues = append(allMeasuredValues, measuredValues...)
+
+	log.Println(len(allMeasuredValues))
+
+	err = jl.Write(allMeasuredValues)
+	if err != nil {
+		return err
+
+	}
+
+	return nil
 }
 
-func (jl *jsonLogfile) ReadHumidities() ([]*types.Humidity, error) {
-	if _, err := os.Stat(jl.logfile); os.IsNotExist(err) {
-		return nil, fmt.Errorf("%v: %v", errorLogfileNotFound, jl.logfile)
+func (jl *jsonLogfile) Read() ([]types.MeasuredValue, error) {
+
+	measuredValues := make([]types.MeasuredValue, 0)
+
+	humidityValues, err := jl.readHumidities()
+	if err != nil {
+		return nil, err
+	}
+	measuredValues = append(measuredValues, humidityValues...)
+
+	temperatureValues, err := jl.readTemperatures()
+	if err != nil {
+		return nil, err
+	}
+	measuredValues = append(measuredValues, temperatureValues...)
+
+	return measuredValues, nil
+}
+
+func (jl *jsonLogfile) readHumidities() ([]types.MeasuredValue, error) {
+
+	if _, err := os.Stat(jl.cnf.Device.HumidityLogfile); os.IsNotExist(err) {
+		return nil, fmt.Errorf("%v: %v", errorLogfileNotFound, jl.cnf.Device.HumidityLogfile)
 	}
 
 	humidities := make([]*types.Humidity, 0)
 
-	f, err := os.Open(jl.logfile)
+	f, err := os.Open(jl.cnf.Device.HumidityLogfile)
 	if err != nil {
-		return nil, fmt.Errorf("%v: %v", errorLogfileOpen, jl.logfile)
+		return nil, fmt.Errorf("%v: %v", errorLogfileOpen, jl.cnf.Device.HumidityLogfile)
+
 	}
 	defer f.Close()
 
-	jsonDecoder := json.NewDecoder(f)
-	err = jsonDecoder.Decode(&humidities)
-	if err != nil {
+	if err = json.NewDecoder(f).Decode(&humidities); err != nil {
 		return nil, fmt.Errorf("%v: %v", errorLogfileDecode, err)
 	}
 
-	return humidities, nil
+	measuredValues := make([]types.MeasuredValue, 0)
+
+	for _, humidity := range humidities {
+		measuredValues = append(measuredValues, humidity)
+	}
+
+	return measuredValues, nil
+
 }
 
-func (jl *jsonLogfile) ReadTemperatures() ([]*types.Temperature, error) {
-	if _, err := os.Stat(jl.logfile); os.IsNotExist(err) {
-		return nil, fmt.Errorf("%v: %v", errorLogfileNotFound, jl.logfile)
+func (jl *jsonLogfile) readTemperatures() ([]types.MeasuredValue, error) {
+	if _, err := os.Stat(jl.cnf.Device.TemperatureLogfile); os.IsNotExist(err) {
+		return nil, fmt.Errorf("%v: %v", errorLogfileNotFound, jl.cnf.Device.TemperatureLogfile)
+
 	}
 
 	temperatures := make([]*types.Temperature, 0)
 
-	f, err := os.Open(jl.logfile)
+	f, err := os.Open(jl.cnf.Device.TemperatureLogfile)
 	if err != nil {
-		return nil, fmt.Errorf("%v: %v", errorLogfileOpen, jl.logfile)
+		return nil, fmt.Errorf("%v: %v", errorLogfileOpen, jl.cnf.Device.TemperatureLogfile)
+
 	}
 	defer f.Close()
 
-	jsonDecoder := json.NewDecoder(f)
-	err = jsonDecoder.Decode(&temperatures)
-	if err != nil {
+	if err := json.NewDecoder(f).Decode(&temperatures); err != nil {
 		return nil, fmt.Errorf("%v: %v", errorLogfileDecode, err)
 	}
 
-	return temperatures, nil
+	measuredValues := make([]types.MeasuredValue, 0)
+
+	for _, temperature := range temperatures {
+		measuredValues = append(measuredValues, temperature)
+	}
+
+	return measuredValues, nil
+
 }
 
-func (jl *jsonLogfile) WriteHumidities(humidities []*types.Humidity) error {
+func (jl *jsonLogfile) Write(measuredValues []types.MeasuredValue) error {
+	humidities := make([]*types.Humidity, 0)
+	temperatures := make([]*types.Temperature, 0)
 
-	f, err := os.Create(jl.logfile)
+	for _, measuredValue := range measuredValues {
+		switch v := measuredValue.(type) {
+		case *types.Humidity:
+			humidities = append(humidities, v)
+		case *types.Temperature:
+			temperatures = append(temperatures, v)
+		default:
+			return fmt.Errorf("%v", errorTypeSwitch)
+		}
+	}
+
+	errorChannel := make(chan error, 0)
+
+	wg := new(sync.WaitGroup)
+	wg.Add(2)
+
+	go jl.writeHumidities(humidities, errorChannel, wg)
+	go jl.writeTemperatures(temperatures, errorChannel, wg)
+
+	wg.Wait()
+
+	errors := collect.Errors(errorChannel)
+	if len(errors) > 0 {
+		return prittyprint.FormatErrors(errors)
+	}
+
+	return nil
+
+}
+
+func (jl *jsonLogfile) writeHumidities(humidities []*types.Humidity, errorChannel chan<- error, wg *sync.WaitGroup) {
+	defer wg.Done()
+
+	f, err := os.Create(jl.cnf.Device.HumidityLogfile)
 	if err != nil {
-		return fmt.Errorf("%v: %v", errorLogfileCreate, jl.logfile)
+		errorChannel <- fmt.Errorf("%v: %v", errorLogfileCreate, jl.cnf.Device.HumidityLogfile)
+		return
 	}
 	defer f.Close()
 
@@ -72,25 +166,28 @@ func (jl *jsonLogfile) WriteHumidities(humidities []*types.Humidity) error {
 	jsonEncoder.SetIndent("", "  ")
 	err = jsonEncoder.Encode(humidities)
 	if err != nil {
-		return fmt.Errorf("%v: %v", errorLogfileEncode, err)
+		errorChannel <- fmt.Errorf("%v: %v", errorLogfileEncode, err)
+		return
 	}
-	return nil
 }
 
-func (jl *jsonLogfile) WriteTemperatures(temperatures []*types.Temperature) error {
-	f, err := os.Create(jl.logfile)
+func (jl *jsonLogfile) writeTemperatures(temperatures []*types.Temperature, errorChannel chan<- error, wg *sync.WaitGroup) {
+	defer wg.Done()
+
+	f, err := os.Create(jl.cnf.Device.TemperatureLogfile)
 	if err != nil {
-		return fmt.Errorf("%v: %v", errorLogfileCreate, jl.logfile)
+		errorChannel <- fmt.Errorf("%v: %v", errorLogfileCreate, jl.cnf.Device.TemperatureLogfile)
+		return
 	}
 	defer f.Close()
 
-	writeCreationDate(temperatures)
+	//writeCreationDate(temperatures)
 
 	jsonEncoder := json.NewEncoder(f)
 	jsonEncoder.SetIndent("", "  ")
 	err = jsonEncoder.Encode(temperatures)
 	if err != nil {
-		return fmt.Errorf("%v: %v", errorLogfileEncode, err)
+		errorChannel <- fmt.Errorf("%v: %v", errorLogfileEncode, err)
+		return
 	}
-	return nil
 }

pkg/logfile/logfile.go

@@ -1,45 +1,39 @@
 package logfile
 
 import (
-	"os"
-	"path/filepath"
-	"regexp"
-	"sort"
-	"time"
-
-	"github.com/go-flucky/flucky/pkg/types"
+	"github.com/go-flucky/flucky/pkg/config"
 )
 
-var validUUID = regexp.MustCompile("^[a-fA-F0-9]{8}-[a-fA-F0-9]{4}-4[a-fA-F0-9]{3}-[8|9|aA|bB][a-fA-F0-9]{3}-[a-fA-F0-9]{12}$")
-var timeFormat = "2006-01-02 15:04:05.999999999 -0700"
+// var validUUID = regexp.MustCompile("^[a-fA-F0-9]{8}-[a-fA-F0-9]{4}-4[a-fA-F0-9]{3}-[8|9|aA|bB][a-fA-F0-9]{3}-[a-fA-F0-9]{12}$")
+// var timeFormat = "2006-01-02 15:04:05.999999999 -0700"
 
-// AppendTemperatures with temperature values from a logfile. As additional
-// option it's possible to compress the temperature data.
-func AppendTemperatures(logfile Logfile, compression bool, temperatures []*types.Temperature) error {
+// // AppendTemperatures with temperature values from a logfile. As additional
+// // option it's possible to compress the temperature data.
+// func AppendTemperatures(logfile Logfile, compression bool, temperatures []*types.Temperature) error {
 
-	allTemperatures := make([]*types.Temperature, 0)
+// 	allTemperatures := make([]*types.Temperature, 0)
 
-	if _, err := os.Stat(logfile.GetLogfile()); err == nil {
-		temperaturesFromLogfile, err := logfile.ReadTemperatures()
-		if err != nil {
-			return err
-		}
+// 	if _, err := os.Stat(logfile.GetLogfile()); err == nil {
+// 		temperaturesFromLogfile, err := logfile.ReadTemperatures()
+// 		if err != nil {
+// 			return err
+// 		}
 
-		allTemperatures = append(allTemperatures, temperaturesFromLogfile...)
-	}
+// 		allTemperatures = append(allTemperatures, temperaturesFromLogfile...)
+// 	}
 
-	allTemperatures = append(allTemperatures, temperatures...)
+// 	allTemperatures = append(allTemperatures, temperatures...)
 
-	if compression {
-		allTemperatures = CompressTemperature(allTemperatures)
-	}
+// 	if compression {
+// 		allTemperatures = CompressTemperature(allTemperatures)
+// 	}
 
-	err := logfile.WriteTemperatures(allTemperatures)
-	if err != nil {
-		return err
-	}
-	return nil
-}
+// 	err := logfile.WriteTemperatures(allTemperatures)
+// 	if err != nil {
+// 		return err
+// 	}
+// 	return nil
+// }
 
 // CompressTemperature compresses the temperatures from an array. It is checked
 // whether the measured temperature of a value corresponds to that of the
@@ -47,116 +41,118 @@ func AppendTemperatures(logfile Logfile, compression bool, temperatures []*types
 // validity date of the predecessor value is set to that of the current value.
 // No information is lost as a result. The validity period of the measured value
 // is thereby exclusively increased.
-func CompressTemperature(temperatures []*types.Temperature) []*types.Temperature {
-	compressedTemperatures := make([]*types.Temperature, 0)
-	lastTemperatureBySensors := make(map[string]*types.Temperature, 0)
+// func Compression(measuredValues []types) []*types.Temperature {
+// 	compressedTemperatures := make([]*types.Temperature, 0)
+// 	lastTemperatureBySensors := make(map[string]*types.Temperature, 0)
 
-	// Sort all measured temperatures beforehand by the starting validity date to
-	// avoid errors when compressing the temperatures.
-	SortTemperatures(temperatures)
+// 	// Sort all measured temperatures beforehand by the starting validity date to
+// 	// avoid errors when compressing the temperatures.
+// 	SortTemperatures(temperatures)
 
-	for _, temperature := range temperatures {
-		if lastTemperatureBySensor, ok := lastTemperatureBySensors[temperature.SensorID]; ok {
-			if lastTemperatureBySensor.TemperatureValue == temperature.TemperatureValue {
+// 	for _, temperature := range temperatures {
+// 		if lastTemperatureBySensor, ok := lastTemperatureBySensors[temperature.SensorID]; ok {
+// 			if lastTemperatureBySensor.TemperatureValue == temperature.TemperatureValue {
 
-				lastTemperatureBySensors[temperature.SensorID].TemperatureTillDate = temperature.TemperatureTillDate
+// 				lastTemperatureBySensors[temperature.SensorID].TemperatureTillDate = temperature.TemperatureTillDate
 
-				now := time.Now()
-				lastTemperatureBySensors[temperature.SensorID].UpdateDate = &now
-			} else {
-				compressedTemperatures = append(compressedTemperatures, lastTemperatureBySensors[temperature.SensorID])
-				lastTemperatureBySensors[temperature.SensorID] = temperature
-			}
-		} else {
-			lastTemperatureBySensors[temperature.SensorID] = temperature
-		}
-	}
+// 				now := time.Now()
+// 				lastTemperatureBySensors[temperature.SensorID].UpdateDate = &now
+// 			} else {
+// 				compressedTemperatures = append(compressedTemperatures, lastTemperatureBySensors[temperature.SensorID])
+// 				lastTemperatureBySensors[temperature.SensorID] = temperature
+// 			}
+// 		} else {
+// 			lastTemperatureBySensors[temperature.SensorID] = temperature
+// 		}
+// 	}
 
-	// Copy all remaining entries from the map into the array
-	for _, lastTemperatureBySensor := range lastTemperatureBySensors {
-		compressedTemperatures = append(compressedTemperatures, lastTemperatureBySensor)
-	}
+// 	// Copy all remaining entries from the map into the array
+// 	for _, lastTemperatureBySensor := range lastTemperatureBySensors {
+// 		compressedTemperatures = append(compressedTemperatures, lastTemperatureBySensor)
+// 	}
 
-	return compressedTemperatures
-}
+// 	return compressedTemperatures
+// }
 
 // New returns a log file with basic functions for reading and writing data. The
 // file extension of the logfile is taken into account to format the logfile
 // into the correct format.
-func New(logfile string) Logfile {
+func New(cnf *config.Configuration) Logfile {
 
-	ext := filepath.Ext(logfile)
+	// switch ext {
+	// case ".csv":
+	// 	return &csvLogfile{
+	// 		logfile: logfile,
+	// 	}
+	// case ".json":
+	// 	return &jsonLogfile{
+	// 		cnf: cnf,
+	// 	}
+	// case ".xml":
+	// 	return &xmlLogfile{
+	// 		logfile: logfile,
+	// 	}
+	// default:
+	// 	return &jsonLogfile{
+	// 		logfile: logfile,
+	// 	}
+	// }
 
-	switch ext {
-	case ".csv":
-		return &csvLogfile{
-			logfile: logfile,
-		}
-	case ".json":
-		return &jsonLogfile{
-			logfile: logfile,
-		}
-	case ".xml":
-		return &xmlLogfile{
-			logfile: logfile,
-		}
-	default:
-		return &jsonLogfile{
-			logfile: logfile,
-		}
+	return &jsonLogfile{
+		cnf: cnf,
 	}
 }
 
-// SplittTemperatures into multiple arrays. The Size can be defined by
-// temperatureSplitBy parameter.
-func SplittTemperatures(temperatures []*types.Temperature, templeratureSplitBy int) [][]*types.Temperature {
-	splittedTemperatures := make([][]*types.Temperature, 0)
-	newTemperatures := make([]*types.Temperature, 0)
-	for _, temperature := range temperatures {
-		if len(newTemperatures) == templeratureSplitBy {
-			splittedTemperatures = append(splittedTemperatures, newTemperatures)
-			newTemperatures = make([]*types.Temperature, 0)
-		}
-		newTemperatures = append(newTemperatures, temperature)
-	}
-	splittedTemperatures = append(splittedTemperatures, newTemperatures)
-	return splittedTemperatures
-}
+// // SplittTemperatures into multiple arrays. The Size can be defined by
+// // temperatureSplitBy parameter.
+// func SplittTemperatures(temperatures []*types.Temperature, templeratureSplitBy int) [][]*types.Temperature {
+// 	splittedTemperatures := make([][]*types.Temperature, 0)
+// 	newTemperatures := make([]*types.Temperature, 0)
+// 	for _, temperature := range temperatures {
+// 		if len(newTemperatures) == templeratureSplitBy {
+// 			splittedTemperatures = append(splittedTemperatures, newTemperatures)
+// 			newTemperatures = make([]*types.Temperature, 0)
+// 		}
+// 		newTemperatures = append(newTemperatures, temperature)
+// 	}
+// 	splittedTemperatures = append(splittedTemperatures, newTemperatures)
+// 	return splittedTemperatures
+// }
 
-// SortTemperatures by TemperatureFromDate
-func SortTemperatures(temperatures []*types.Temperature) {
-	sort.SliceStable(temperatures, func(i int, j int) bool {
-		return temperatures[i].TemperatureFromDate.Before(temperatures[j].TemperatureFromDate)
-	})
-}
+// // SortTemperatures by TemperatureFromDate
+// func SortTemperatures(temperatures []*types.Temperature) {
+// 	sort.SliceStable(temperatures, func(i int, j int) bool {
+// 		return temperatures[i].TemperatureFromDate.Before(temperatures[j].TemperatureFromDate)
+// 	})
+// }
 
-// ValidateTemperatures Checks if the temperature data is valid.
-// - Check the temperature id (uuid)
-// - Checks whether the time specifications are historically in a sequence.
-// - Check the sensor id (uuid)
-func ValidateTemperatures(temperatures []*types.Temperature) error {
-	for _, temperature := range temperatures {
-		if !validUUID.MatchString(temperature.TemperatureID) {
-			return errorNoValidTemperatureID
-		} else if temperature.TemperatureValue == 0 {
-			return errorNoValidMesuredValue
-		} else if temperature.TemperatureFromDate.After(temperature.TemperatureTillDate) {
-			return errorNoValidTimePeriods
-		} else if !validUUID.MatchString(temperature.SensorID) {
-			return errorNoValidSensorID
-		} else if temperature.CreationDate.After(*temperature.UpdateDate) && temperature.UpdateDate != nil {
-			return errorNoValidTimePeriods
-		}
-	}
+// // ValidateTemperatures Checks if the temperature data is valid.
+// // - Check the temperature id (uuid)
+// // - Checks whether the time specifications are historically in a sequence.
+// // - Check the sensor id (uuid)
+// func ValidateTemperatures(temperatures []*types.Temperature) error {
+// 	for _, temperature := range temperatures {
+// 		if !validUUID.MatchString(temperature.TemperatureID) {
+// 			return errorNoValidTemperatureID
+// 		} else if temperature.TemperatureValue == 0 {
+// 			return errorNoValidMesuredValue
+// 		} else if temperature.TemperatureFromDate.After(temperature.TemperatureTillDate) {
+// 			return errorNoValidTimePeriods
+// 		} else if !validUUID.MatchString(temperature.SensorID) {
+// 			return errorNoValidSensorID
+// 		} else if temperature.CreationDate.After(*temperature.UpdateDate) && temperature.UpdateDate != nil {
+// 			return errorNoValidTimePeriods
+// 		}
+// 	}
 
-	return nil
-}
+// 	return nil
+// }
 
-func writeCreationDate(temperatures []*types.Temperature) {
-	now := time.Now()
-	for _, temperature := range temperatures {
-		if temperature.CreationDate == nil {
-			temperature.CreationDate = &now
-		}
-	}
-}
+// func writeCreationDate(temperatures []*types.Temperature) {
+// 	now := time.Now()
+// 	for _, temperature := range temperatures {
+// 		if temperature.CreationDate == nil {
+// 			temperature.CreationDate = &now
+// 		}
+// 	}
+// }

pkg/logfile/xml.go

@@ -1,121 +1,112 @@
 package logfile
 
-import (
-	"encoding/xml"
-	"fmt"
-	"io/ioutil"
-	"os"
+// type xmlLogfile struct {
+// 	logfile string
+// }
 
-	"github.com/go-flucky/flucky/pkg/types"
-)
+// func (xl *xmlLogfile) GetLogfile() string {
+// 	return xl.logfile
+// }
 
-type xmlLogfile struct {
-	logfile string
-}
+// func (xl *xmlLogfile) ReadHumidities() ([]*types.Humidity, error) {
+// 	if _, err := os.Stat(xl.logfile); os.IsNotExist(err) {
+// 		return nil, fmt.Errorf("%v: %v", errorLogfileNotFound, xl.logfile)
+// 	}
 
-func (xl *xmlLogfile) GetLogfile() string {
-	return xl.logfile
-}
+// 	humidities := make([]*types.Humidity, 0)
 
-func (xl *xmlLogfile) ReadHumidities() ([]*types.Humidity, error) {
-	if _, err := os.Stat(xl.logfile); os.IsNotExist(err) {
-		return nil, fmt.Errorf("%v: %v", errorLogfileNotFound, xl.logfile)
-	}
+// 	f, err := os.Open(xl.logfile)
+// 	if err != nil {
+// 		return nil, fmt.Errorf("%v: %v", errorLogfileOpen, xl.logfile)
+// 	}
+// 	defer f.Close()
 
-	humidities := make([]*types.Humidity, 0)
+// 	xmlDecoder := xml.NewDecoder(f)
+// 	err = xmlDecoder.Decode(&humidities)
+// 	if err != nil {
+// 		return nil, fmt.Errorf("%v: %v", errorLogfileDecode, err)
+// 	}
 
-	f, err := os.Open(xl.logfile)
-	if err != nil {
-		return nil, fmt.Errorf("%v: %v", errorLogfileOpen, xl.logfile)
-	}
-	defer f.Close()
+// 	return humidities, nil
+// }
 
-	xmlDecoder := xml.NewDecoder(f)
-	err = xmlDecoder.Decode(&humidities)
-	if err != nil {
-		return nil, fmt.Errorf("%v: %v", errorLogfileDecode, err)
-	}
+// func (xl *xmlLogfile) ReadTemperatures() ([]*types.Temperature, error) {
+// 	if _, err := os.Stat(xl.logfile); os.IsNotExist(err) {
+// 		return nil, fmt.Errorf("%v: %v", errorLogfileNotFound, xl.logfile)
+// 	}
 
-	return humidities, nil
-}
+// 	f, err := os.Open(xl.logfile)
+// 	if err != nil {
+// 		return nil, fmt.Errorf("%v: %v", errorLogfileOpen, xl.logfile)
+// 	}
+// 	defer f.Close()
 
-func (xl *xmlLogfile) ReadTemperatures() ([]*types.Temperature, error) {
-	if _, err := os.Stat(xl.logfile); os.IsNotExist(err) {
-		return nil, fmt.Errorf("%v: %v", errorLogfileNotFound, xl.logfile)
-	}
+// 	bytes, err := ioutil.ReadAll(f)
+// 	if err != nil {
+// 		return nil, fmt.Errorf("%v: %v", errorLogfileRead, err)
+// 	}
 
-	f, err := os.Open(xl.logfile)
-	if err != nil {
-		return nil, fmt.Errorf("%v: %v", errorLogfileOpen, xl.logfile)
-	}
-	defer f.Close()
+// 	tmpTemperatures := new(Temperatures)
 
-	bytes, err := ioutil.ReadAll(f)
-	if err != nil {
-		return nil, fmt.Errorf("%v: %v", errorLogfileRead, err)
-	}
+// 	err = xml.Unmarshal(bytes, tmpTemperatures)
+// 	if err != nil {
+// 		return nil, fmt.Errorf("%v: %v", errorLogfileUnmarshal, err)
+// 	}
 
-	tmpTemperatures := new(Temperatures)
+// 	temperatures := make([]*types.Temperature, 0)
 
-	err = xml.Unmarshal(bytes, tmpTemperatures)
-	if err != nil {
-		return nil, fmt.Errorf("%v: %v", errorLogfileUnmarshal, err)
-	}
+// 	for _, tmpTemperature := range tmpTemperatures.Temperatures {
+// 		temperatures = append(temperatures, tmpTemperature.Temperature)
+// 	}
 
-	temperatures := make([]*types.Temperature, 0)
+// 	return temperatures, nil
+// }
 
-	for _, tmpTemperature := range tmpTemperatures.Temperatures {
-		temperatures = append(temperatures, tmpTemperature.Temperature)
-	}
+// func (xl *xmlLogfile) WriteHumidities(humidities []*types.Humidity) error {
 
-	return temperatures, nil
-}
+// 	f, err := os.Create(xl.logfile)
+// 	if err != nil {
+// 		return fmt.Errorf("%v: %v", errorLogfileCreate, xl.logfile)
+// 	}
+// 	defer f.Close()
 
-func (xl *xmlLogfile) WriteHumidities(humidities []*types.Humidity) error {
+// 	xmlEncoder := xml.NewEncoder(f)
+// 	xmlEncoder.Indent("", "  ")
+// 	err = xmlEncoder.Encode(humidities)
+// 	if err != nil {
+// 		return fmt.Errorf("%v: %v", errorLogfileEncode, err)
+// 	}
+// 	return nil
+// }
 
-	f, err := os.Create(xl.logfile)
-	if err != nil {
-		return fmt.Errorf("%v: %v", errorLogfileCreate, xl.logfile)
-	}
-	defer f.Close()
+// func (xl *xmlLogfile) WriteTemperatures(temperatures []*types.Temperature) error {
+// 	f, err := os.Create(xl.logfile)
+// 	if err != nil {
+// 		return fmt.Errorf("%v: %v", errorLogfileCreate, xl.logfile)
+// 	}
+// 	defer f.Close()
 
-	xmlEncoder := xml.NewEncoder(f)
-	xmlEncoder.Indent("", "  ")
-	err = xmlEncoder.Encode(humidities)
-	if err != nil {
-		return fmt.Errorf("%v: %v", errorLogfileEncode, err)
-	}
-	return nil
-}
+// 	writeCreationDate(temperatures)
 
-func (xl *xmlLogfile) WriteTemperatures(temperatures []*types.Temperature) error {
-	f, err := os.Create(xl.logfile)
-	if err != nil {
-		return fmt.Errorf("%v: %v", errorLogfileCreate, xl.logfile)
-	}
-	defer f.Close()
+// 	tmpTemperatures := new(Temperatures)
 
-	writeCreationDate(temperatures)
+// 	for _, temperature := range temperatures {
+// 		tmpTemperature := &Temperature{
+// 			Temperature: temperature,
+// 		}
 
-	tmpTemperatures := new(Temperatures)
+// 		tmpTemperatures.Temperatures = append(tmpTemperatures.Temperatures, tmpTemperature)
+// 	}
 
-	for _, temperature := range temperatures {
-		tmpTemperature := &Temperature{
-			Temperature: temperature,
-		}
+// 	bytes, err := xml.MarshalIndent(tmpTemperatures, "", "  ")
+// 	if err != nil {
+// 		return fmt.Errorf("%v: %v", errorLogfileMarshal, err)
+// 	}
 
-		tmpTemperatures.Temperatures = append(tmpTemperatures.Temperatures, tmpTemperature)
-	}
+// 	_, err = f.Write(bytes)
+// 	if err != nil {
+// 		return fmt.Errorf("%v: %v", errorLogfileWrite, err)
+// 	}
 
-	bytes, err := xml.MarshalIndent(tmpTemperatures, "", "  ")
-	if err != nil {
-		return fmt.Errorf("%v: %v", errorLogfileMarshal, err)
-	}
-
-	_, err = f.Write(bytes)
-	if err != nil {
-		return fmt.Errorf("%v: %v", errorLogfileWrite, err)
-	}
-
-	return nil
-}
+// 	return nil
+// }

pkg/sensor/dht11.go

@@ -3,7 +3,6 @@ package sensor
 import (
 	"context"
 	"fmt"
-	"math"
 	"sync"
 	"time"
 
@@ -22,8 +21,9 @@ func (s *DHT11) GetSensorModel() types.SensorModel {
 	return s.Sensor.SensorModel
 }
 
-// ReadHumidity measure the humidity
-func (s *DHT11) ReadHumidity(round float64) (*types.Humidity, error) {
+// Read measured values
+func (s *DHT11) Read() ([]types.MeasuredValue, error) {
+
 	err := dht.HostInit()
 	if err != nil {
 		return nil, fmt.Errorf("HostInit error: %v", err)
@@ -39,117 +39,59 @@ func (s *DHT11) ReadHumidity(round float64) (*types.Humidity, error) {
 		return nil, fmt.Errorf("NewDHT error: %v", err)
 	}
 
-	humidityValue, _, err := dht.Read()
+	humidityValue, temperatureValue, err := dht.Read()
 	if err != nil {
 		return nil, fmt.Errorf("Read error: %v", err)
 	}
 
-	if round != 0 {
-		humidityValue = math.Round(humidityValue/round) * round
+	measuredValues := []types.MeasuredValue{
+		&types.Humidity{
+			HumidityID:       uuid.NewV4().String(),
+			HumidityValue:    humidityValue,
+			HumidityFromDate: time.Now(),
+			HumidityTillDate: time.Now(),
+			SensorID:         s.SensorID,
+		},
+		&types.Temperature{
+			TemperatureID:       uuid.NewV4().String(),
+			TemperatureValue:    temperatureValue,
+			TemperatureFromDate: time.Now(),
+			TemperatureTillDate: time.Now(),
+			SensorID:            s.SensorID,
+		},
 	}
 
-	humidity := &types.Humidity{
-		HumidityID:       uuid.NewV4().String(),
-		HumidityValue:    humidityValue,
-		HumidityFromDate: time.Now(),
-		HumidityTillDate: time.Now(),
-		SensorID:         s.SensorID,
-	}
-
-	return humidity, nil
+	return measuredValues, nil
 }
 
-// ReadHumidityWriteIntoChannel and write values into a channel
-func (s *DHT11) ReadHumidityWriteIntoChannel(round float64, humidityChannel chan<- *types.Humidity, errorChannel chan<- error, wg *sync.WaitGroup) {
+// ReadChannel reads the measured values from the sensor and writes them to a
+// channel.
+func (s *DHT11) ReadChannel(measuredValueChannel chan<- types.MeasuredValue, errorChannel chan<- error, wg *sync.WaitGroup) {
 	if wg != nil {
 		defer wg.Done()
 	}
 
-	humidity, err := s.ReadHumidity(round)
+	measuredValues, err := s.Read()
 	if err != nil {
 		errorChannel <- err
 		return
 	}
-	humidityChannel <- humidity
+
+	for _, measuredValue := range measuredValues {
+		measuredValueChannel <- measuredValue
+	}
 }
 
-// ReadHumidityContinously into a channel until context closed
-func (s *DHT11) ReadHumidityContinously(ctx context.Context, round float64, humidityChannel chan<- *types.Humidity, errorChannel chan<- error) {
+// ReadContinously reads the measured values continously from the sensor and
+// writes them to a channel.
+func (s *DHT11) ReadContinously(ctx context.Context, measuredValueChannel chan<- types.MeasuredValue, errorChannel chan<- error) {
 	for {
 		select {
 		case <-ctx.Done():
 			errorChannel <- fmt.Errorf("%v: Context closed: %v", s.SensorName, ctx.Err())
 			return
 		default:
-			s.ReadHumidityWriteIntoChannel(round, humidityChannel, errorChannel, nil)
-		}
-	}
-}
-
-// ReadTemperature measure the temperature
-func (s *DHT11) ReadTemperature(degree types.TemperatureUnit, round float64) (*types.Temperature, error) {
-	err := dht.HostInit()
-	if err != nil {
-		return nil, fmt.Errorf("HostInit error: %v", err)
-	}
-
-	gpio, err := types.GPIOToString(*s.GPIONumber)
-	if err != nil {
-		return nil, err
-	}
-
-	dht, err := dht.NewDHT(gpio, dht.Celsius, "")
-	if err != nil {
-		return nil, fmt.Errorf("NewDHT error: %v", err)
-	}
-
-	_, temperatureValue, err := dht.Read()
-	if err != nil {
-		return nil, fmt.Errorf("Read error: %v", err)
-	}
-
-	// Convert temperature degree
-	temperatureValue = convertTemperatureMeasurementUnit(temperatureValue, types.TemperatureUnitCelsius, degree)
-
-	if round != 0 {
-		temperatureValue = math.Round(temperatureValue/round) * round
-	}
-
-	temperature := &types.Temperature{
-		TemperatureID:       uuid.NewV4().String(),
-		TemperatureValue:    temperatureValue,
-		TemperatureUnit:     degree,
-		TemperatureFromDate: time.Now(),
-		TemperatureTillDate: time.Now(),
-		SensorID:            s.SensorID,
-	}
-
-	return temperature, nil
-}
-
-// ReadTemperatureWriteIntoChannel and write values into a channel
-func (s *DHT11) ReadTemperatureWriteIntoChannel(degree types.TemperatureUnit, round float64, temperatureChannel chan<- *types.Temperature, errorChannel chan<- error, wg *sync.WaitGroup) {
-	if wg != nil {
-		defer wg.Done()
-	}
-
-	temperature, err := s.ReadTemperature(degree, round)
-	if err != nil {
-		errorChannel <- err
-		return
-	}
-	temperatureChannel <- temperature
-}
-
-// ReadTemperatureContinously into a channel until context closed
-func (s *DHT11) ReadTemperatureContinously(ctx context.Context, degree types.TemperatureUnit, round float64, temperatureChannel chan<- *types.Temperature, errorChannel chan<- error) {
-	for {
-		select {
-		case <-ctx.Done():
-			errorChannel <- fmt.Errorf("%v: Context closed: %v", s.SensorName, ctx.Err())
-			return
-		default:
-			s.ReadTemperatureWriteIntoChannel(degree, round, temperatureChannel, errorChannel, nil)
+			s.ReadChannel(measuredValueChannel, errorChannel, nil)
 		}
 	}
 }

pkg/sensor/dht22.go

@@ -3,7 +3,6 @@ package sensor
 import (
 	"context"
 	"fmt"
-	"math"
 	"sync"
 	"time"
 
@@ -22,8 +21,9 @@ func (s *DHT22) GetSensorModel() types.SensorModel {
 	return s.Sensor.SensorModel
 }
 
-// ReadHumidity measure the humidity
-func (s *DHT22) ReadHumidity(round float64) (*types.Humidity, error) {
+// Read measured values
+func (s *DHT22) Read() ([]types.MeasuredValue, error) {
+
 	err := dht.HostInit()
 	if err != nil {
 		return nil, fmt.Errorf("HostInit error: %v", err)
@@ -39,118 +39,59 @@ func (s *DHT22) ReadHumidity(round float64) (*types.Humidity, error) {
 		return nil, fmt.Errorf("NewDHT error: %v", err)
 	}
 
-	humidityValue, _, err := dht.Read()
+	humidityValue, temperatureValue, err := dht.Read()
 	if err != nil {
 		return nil, fmt.Errorf("Read error: %v", err)
 	}
 
-	if round != 0 {
-		humidityValue = math.Round(humidityValue/round) * round
+	measuredValues := []types.MeasuredValue{
+		&types.Humidity{
+			HumidityID:       uuid.NewV4().String(),
+			HumidityValue:    humidityValue,
+			HumidityFromDate: time.Now(),
+			HumidityTillDate: time.Now(),
+			SensorID:         s.SensorID,
+		},
+		&types.Temperature{
+			TemperatureID:       uuid.NewV4().String(),
+			TemperatureValue:    temperatureValue,
+			TemperatureFromDate: time.Now(),
+			TemperatureTillDate: time.Now(),
+			SensorID:            s.SensorID,
+		},
 	}
 
-	humidity := &types.Humidity{
-		HumidityID:       uuid.NewV4().String(),
-		HumidityValue:    humidityValue,
-		HumidityFromDate: time.Now(),
-		HumidityTillDate: time.Now(),
-		SensorID:         s.SensorID,
-	}
-
-	return humidity, nil
+	return measuredValues, nil
 }
 
-// ReadHumidityWriteIntoChannel and write values into a channel
-func (s *DHT22) ReadHumidityWriteIntoChannel(round float64, humidityChannel chan<- *types.Humidity, errorChannel chan<- error, wg *sync.WaitGroup) {
+// ReadChannel reads the measured values from the sensor and writes them to a
+// channel.
+func (s *DHT22) ReadChannel(measuredValueChannel chan<- types.MeasuredValue, errorChannel chan<- error, wg *sync.WaitGroup) {
 	if wg != nil {
 		defer wg.Done()
 	}
 
-	humidity, err := s.ReadHumidity(round)
+	measuredValues, err := s.Read()
 	if err != nil {
 		errorChannel <- err
 		return
 	}
-	humidityChannel <- humidity
+
+	for _, measuredValue := range measuredValues {
+		measuredValueChannel <- measuredValue
+	}
 }
 
-// ReadHumidityContinously into a channel until context closed
-func (s *DHT22) ReadHumidityContinously(ctx context.Context, round float64, humidityChannel chan<- *types.Humidity, errorChannel chan<- error) {
+// ReadContinously reads the measured values continously from the sensor and
+// writes them to a channel.
+func (s *DHT22) ReadContinously(ctx context.Context, measuredValueChannel chan<- types.MeasuredValue, errorChannel chan<- error) {
 	for {
 		select {
 		case <-ctx.Done():
 			errorChannel <- fmt.Errorf("%v: Context closed: %v", s.SensorName, ctx.Err())
 			return
 		default:
-			s.ReadHumidityWriteIntoChannel(round, humidityChannel, errorChannel, nil)
-		}
-	}
-}
-
-// ReadTemperature measure the temperature
-func (s *DHT22) ReadTemperature(degree types.TemperatureUnit, round float64) (*types.Temperature, error) {
-	err := dht.HostInit()
-	if err != nil {
-		return nil, fmt.Errorf("HostInit error: %v", err)
-	}
-
-	gpio, err := types.GPIOToString(*s.GPIONumber)
-	if err != nil {
-		return nil, err
-	}
-
-	dht, err := dht.NewDHT(gpio, dht.Celsius, "")
-	if err != nil {
-		return nil, fmt.Errorf("NewDHT error: %v", err)
-	}
-
-	_, temperatureValue, err := dht.Read()
-	if err != nil {
-		return nil, fmt.Errorf("Read error: %v", err)
-	}
-
-	// Convert temperature degree
-	temperatureValue = convertTemperatureMeasurementUnit(temperatureValue, types.TemperatureUnitCelsius, degree)
-
-	// round
-	if round != 0 {
-		temperatureValue = math.Round(temperatureValue/round) * round
-	}
-
-	temperature := &types.Temperature{
-		TemperatureID:       uuid.NewV4().String(),
-		TemperatureValue:    temperatureValue,
-		TemperatureUnit:     degree,
-		TemperatureFromDate: time.Now(),
-		TemperatureTillDate: time.Now(),
-		SensorID:            s.SensorID,
-	}
-
-	return temperature, nil
-}
-
-// ReadTemperatureWriteIntoChannel and write values into a channel
-func (s *DHT22) ReadTemperatureWriteIntoChannel(degree types.TemperatureUnit, round float64, temperatureChannel chan<- *types.Temperature, errorChannel chan<- error, wg *sync.WaitGroup) {
-	if wg != nil {
-		defer wg.Done()
-	}
-
-	temperature, err := s.ReadTemperature(degree, round)
-	if err != nil {
-		errorChannel <- err
-		return
-	}
-	temperatureChannel <- temperature
-}
-
-// ReadTemperatureContinously into a channel until context closed
-func (s *DHT22) ReadTemperatureContinously(ctx context.Context, degree types.TemperatureUnit, round float64, temperatureChannel chan<- *types.Temperature, errorChannel chan<- error) {
-	for {
-		select {
-		case <-ctx.Done():
-			errorChannel <- fmt.Errorf("%v: Context closed: %v", s.SensorName, ctx.Err())
-			return
-		default:
-			s.ReadTemperatureWriteIntoChannel(degree, round, temperatureChannel, errorChannel, nil)
+			s.ReadChannel(measuredValueChannel, errorChannel, nil)
 		}
 	}
 }

pkg/sensor/ds18b20.go

@@ -4,7 +4,6 @@ import (
 	"context"
 	"fmt"
 	"io/ioutil"
-	"math"
 	"path/filepath"
 	"strconv"
 	"strings"
@@ -25,13 +24,8 @@ func (s *DS18B20) GetSensorModel() types.SensorModel {
 	return s.Sensor.SensorModel
 }
 
-// GetSensor return the sensor struct
-func (s *DS18B20) GetSensor() *types.Sensor {
-	return s.Sensor
-}
-
-// ReadTemperature measure the temperature
-func (s *DS18B20) ReadTemperature(degree types.TemperatureUnit, round float64) (*types.Temperature, error) {
+// Read measured values
+func (s *DS18B20) Read() ([]types.MeasuredValue, error) {
 
 	data, err := ioutil.ReadFile(filepath.Join("/sys/bus/w1/devices", *s.WireID, "/w1_slave"))
 	if err != nil {
@@ -52,50 +46,49 @@ func (s *DS18B20) ReadTemperature(degree types.TemperatureUnit, round float64) (
 
 	temperatureValue := c / 1000
 
-	// Convert temperature degree
-	temperatureValue = convertTemperatureMeasurementUnit(temperatureValue, types.TemperatureUnitCelsius, degree)
-
-	// round
-	if round != 0 {
-		temperatureValue = math.Round(temperatureValue/round) * round
+	measuredValues := []types.MeasuredValue{
+		&types.Temperature{
+			TemperatureID:       uuid.NewV4().String(),
+			TemperatureValue:    temperatureValue,
+			TemperatureFromDate: time.Now(),
+			TemperatureTillDate: time.Now(),
+			SensorID:            s.SensorID,
+		},
 	}
 
-	temperature := &types.Temperature{
-		TemperatureID:       uuid.NewV4().String(),
-		TemperatureValue:    temperatureValue,
-		TemperatureUnit:     degree,
-		TemperatureFromDate: time.Now(),
-		TemperatureTillDate: time.Now(),
-		SensorID:            s.SensorID,
-	}
-
-	return temperature, nil
+	return measuredValues, nil
 
 }
 
-// ReadTemperatureWriteIntoChannel and write values into a channel
-func (s *DS18B20) ReadTemperatureWriteIntoChannel(degree types.TemperatureUnit, round float64, temperatureChannel chan<- *types.Temperature, errorChannel chan<- error, wg *sync.WaitGroup) {
+// ReadChannel reads the measured values from the sensor and writes them to a
+// channel.
+func (s *DS18B20) ReadChannel(measuredValueChannel chan<- types.MeasuredValue, errorChannel chan<- error, wg *sync.WaitGroup) {
 	if wg != nil {
 		defer wg.Done()
 	}
 
-	temperature, err := s.ReadTemperature(degree, round)
+	measuredValues, err := s.Read()
 	if err != nil {
 		errorChannel <- err
 		return
 	}
-	temperatureChannel <- temperature
+
+	for _, measuredValue := range measuredValues {
+		measuredValueChannel <- measuredValue
+	}
+
 }
 
-// ReadTemperatureContinously into a channel until context closed
-func (s *DS18B20) ReadTemperatureContinously(ctx context.Context, degree types.TemperatureUnit, round float64, temperatureChannel chan<- *types.Temperature, errorChannel chan<- error) {
+// ReadContinously reads the measured values continously from the sensor and
+// writes them to a channel.
+func (s *DS18B20) ReadContinously(ctx context.Context, measuredValueChannel chan<- types.MeasuredValue, errorChannel chan<- error) {
 	for {
 		select {
 		case <-ctx.Done():
 			errorChannel <- fmt.Errorf("%v: Context closed: %v", s.SensorName, ctx.Err())
 			return
 		default:
-			s.ReadTemperatureWriteIntoChannel(degree, round, temperatureChannel, errorChannel, nil)
+			s.ReadChannel(measuredValueChannel, errorChannel, nil)
 		}
 	}
 }

pkg/sensor/interfaces.go

@@ -7,18 +7,9 @@ import (
 	"github.com/go-flucky/flucky/pkg/types"
 )
 
-// HumiditySensor is a interface to describe required functions to measure humidities
-type HumiditySensor interface {
+type Sensor interface {
 	GetSensorModel() types.SensorModel
-	ReadHumidity(round float64) (*types.Humidity, error)
-	ReadHumidityWriteIntoChannel(round float64, humidityChannel chan<- *types.Humidity, errorChannel chan<- error, wg *sync.WaitGroup)
-	ReadHumidityContinously(ctx context.Context, round float64, humidityChannel chan<- *types.Humidity, errorChannel chan<- error)
-}
-
-// TemperatureSensor is a interface to describe required functions to measure temperatures
-type TemperatureSensor interface {
-	GetSensorModel() types.SensorModel
-	ReadTemperature(degree types.TemperatureUnit, round float64) (*types.Temperature, error)
-	ReadTemperatureWriteIntoChannel(degree types.TemperatureUnit, round float64, temperatureChannel chan<- *types.Temperature, errorChannel chan<- error, wg *sync.WaitGroup)
-	ReadTemperatureContinously(ctx context.Context, degree types.TemperatureUnit, round float64, temperatureChannel chan<- *types.Temperature, errorChannel chan<- error)
+	Read() ([]types.MeasuredValue, error)
+	ReadChannel(measuredValueChannel chan<- types.MeasuredValue, errorChannel chan<- error, wg *sync.WaitGroup)
+	ReadContinously(ctx context.Context, measuredValueChannel chan<- types.MeasuredValue, errorChannel chan<- error)
 }

pkg/sensor/sensor.go

@@ -10,16 +10,16 @@ import (
 	"github.com/go-flucky/flucky/pkg/types"
 )
 
-// ReadHumidities returns a list of measured humidities by humidity sensors
-func ReadHumidities(humiditySensors []HumiditySensor, round float64) ([]*types.Humidity, error) {
-	humidityChannel := make(chan *types.Humidity, len(humiditySensors))
-	errorChannel := make(chan error, len(humiditySensors))
+// Read measured values from sensors
+func Read(ctx context.Context, sensors []Sensor) ([]types.MeasuredValue, error) {
+	measuredValueChannel := make(chan types.MeasuredValue, len(sensors))
+	errorChannel := make(chan error, len(sensors))
 
 	wg := new(sync.WaitGroup)
-	wg.Add(len(humiditySensors))
+	wg.Add(len(sensors))
 
-	for _, humiditySensor := range humiditySensors {
-		go humiditySensor.ReadHumidityWriteIntoChannel(round, humidityChannel, errorChannel, wg)
+	for _, sensor := range sensors {
+		go sensor.ReadContinously(ctx, measuredValueChannel, errorChannel)
 	}
 
 	wg.Wait()
@@ -29,132 +29,29 @@ func ReadHumidities(humiditySensors []HumiditySensor, round float64) ([]*types.H
 		return nil, prittyprint.FormatErrors(errors)
 	}
 
-	humidities := collect.Humidities(humidityChannel)
+	measuredValues := collect.MeasuredValues(measuredValueChannel)
 
-	return humidities, nil
+	return measuredValues, nil
 }
 
-// ReadHumiditiesWriteIntoChannel reads the humidity values of humidity sensors and writes them into a channel
-func ReadHumiditiesWriteIntoChannel(ctx context.Context, humiditySensors []HumiditySensor, round float64, humidityChannel chan<- *types.Humidity, errorChannel chan<- error, wg *sync.WaitGroup) {
-	for _, humiditySensor := range humiditySensors {
-		humiditySensor.ReadHumidityWriteIntoChannel(round, humidityChannel, errorChannel, wg)
+// ReadChannel reads the measured values from sensors and writes them to a
+// channel.
+func ReadChannel(ctx context.Context, sensors []Sensor, measuredValueChannel chan<- types.MeasuredValue, errorChannel chan<- error, wg *sync.WaitGroup) {
+	for _, sensor := range sensors {
+		sensor.ReadChannel(measuredValueChannel, errorChannel, wg)
 	}
 }
 
-// ReadHumiditiesContinuously reads the humidity values of humidity sensors continuously and writes them into a channel
-func ReadHumiditiesContinuously(ctx context.Context, humiditySensors []HumiditySensor, round float64, humidityChannel chan<- *types.Humidity, errorChannel chan<- error) {
+// ReadContinuously reads the measured values continously from sensors and writes
+// them to a channel.
+func ReadContinuously(ctx context.Context, sensors []Sensor, measuredValueChannel chan<- types.MeasuredValue, errorChannel chan<- error) {
 	for {
 		select {
 		case <-ctx.Done():
 			errorChannel <- fmt.Errorf("Context closed: %v", ctx.Err())
 			return
 		default:
-			ReadHumiditiesWriteIntoChannel(ctx, humiditySensors, round, humidityChannel, errorChannel, nil)
+			ReadChannel(ctx, sensors, measuredValueChannel, errorChannel, nil)
 		}
 	}
 }
-
-// ReadTemperatures returns a list of measured temperatures by temperature sensors
-func ReadTemperatures(temperatureSensors []TemperatureSensor, degree types.TemperatureUnit, round float64) ([]*types.Temperature, error) {
-	temperatureChannel := make(chan *types.Temperature, len(temperatureSensors))
-	errorChannel := make(chan error, len(temperatureSensors))
-
-	wg := new(sync.WaitGroup)
-	wg.Add(len(temperatureSensors))
-
-	for _, temperatureSensor := range temperatureSensors {
-		go temperatureSensor.ReadTemperatureWriteIntoChannel(degree, round, temperatureChannel, errorChannel, wg)
-	}
-
-	wg.Wait()
-
-	errors := collect.Errors(errorChannel)
-	if len(errors) > 0 {
-		return nil, prittyprint.FormatErrors(errors)
-	}
-
-	temperatures := collect.Temperatures(temperatureChannel)
-
-	return temperatures, nil
-}
-
-// ReadTemperaturesWriteIntoChannel reads the temperature values of temperature sensors and writes them into a channel
-func ReadTemperaturesWriteIntoChannel(ctx context.Context, temperatureSensors []TemperatureSensor, degree types.TemperatureUnit, round float64, temperatureChannel chan<- *types.Temperature, errorChannel chan<- error, wg *sync.WaitGroup) {
-	for _, temperatureSensor := range temperatureSensors {
-		temperatureSensor.ReadTemperatureWriteIntoChannel(degree, round, temperatureChannel, errorChannel, wg)
-	}
-}
-
-// ReadTemperaturesContinuously reads the temperature values of temperature sensors continuously and writes them into a chann
-func ReadTemperaturesContinuously(ctx context.Context, temperatureSensors []TemperatureSensor, degree types.TemperatureUnit, round float64, temperatureChannel chan<- *types.Temperature, errorChannel chan<- error) {
-	for {
-		select {
-		case <-ctx.Done():
-			errorChannel <- fmt.Errorf("Context closed: %v", ctx.Err())
-			return
-		default:
-			ReadTemperaturesWriteIntoChannel(ctx, temperatureSensors, degree, round, temperatureChannel, errorChannel, nil)
-		}
-	}
-}
-
-func convertTemperatureMeasurementUnit(value float64, fromDegree types.TemperatureUnit, toDegree types.TemperatureUnit) float64 {
-
-	switch fromDegree {
-	// Celsius
-	case types.TemperatureUnitCelsius:
-		switch toDegree {
-		// Celsius -> Celsius
-		case types.TemperatureUnitCelsius:
-			return value
-		// Celsius -> Fahrenheit
-		case types.TemperatureUnitFahrenheit:
-			return (value * 9 / 5) + 32
-		// Celsius -> Kelvin
-		case types.TemperatureUnitKelvin:
-			return value + 273.15
-		}
-
-		// Fahrenheit
-	case types.TemperatureUnitFahrenheit:
-		switch toDegree {
-		// Fahrenheit -> Celsius
-		case types.TemperatureUnitCelsius:
-			return (value - 32) * 5 / 9
-		// Fahrenheit -> Fahrenheit
-		case types.TemperatureUnitFahrenheit:
-			return value
-		// Fahrenheit -> Kelvin
-		case types.TemperatureUnitKelvin:
-			return (value-32)*5/9 + 273.15
-		}
-
-	case types.TemperatureUnitKelvin:
-		switch toDegree {
-		// Kelvin -> Celsius
-		case types.TemperatureUnitCelsius:
-			return value - 273.15
-		// Kelvin -> Fahrenheit
-		case types.TemperatureUnitFahrenheit:
-			return (value-273.15)*9/5 + 32
-		// Kevin -> Kelvin
-		case types.TemperatureUnitKelvin:
-			return value
-		}
-	}
-
-	return value
-}
-
-func SelectTemperatureMeasurementUnit(unit string) (types.TemperatureUnit, error) {
-	switch unit {
-	case "celsius":
-		return types.TemperatureUnitCelsius, nil
-	case "fahrenheit":
-		return types.TemperatureUnitFahrenheit, nil
-	case "kelvin":
-		return types.TemperatureUnitKelvin, nil
-	default:
-		return "", fmt.Errorf("Can not determine temperature measurement unit")
-	}
-}

pkg/types/humidity.go

@@ -12,3 +12,15 @@ type Humidity struct {
 	CreationDate     *time.Time `json:"creation_date" xml:"creation_date"`
 	UpdateDate       *time.Time `json:"update_date" xml:"update_date"`
 }
+
+func (h *Humidity) GetID() string {
+	return h.HumidityID
+}
+
+func (h *Humidity) GetSensorID() string {
+	return h.SensorID
+}
+
+func (h *Humidity) GetValue() float64 {
+	return h.HumidityValue
+}

pkg/types/measuredValue.go

@@ -0,0 +1,7 @@
+package types
+
+type MeasuredValue interface {
+	GetID() string
+	GetSensorID() string
+	GetValue() float64
+}

pkg/types/temperature.go

@@ -1,31 +1,26 @@
 package types
 
-import (
-	"time"
-)
+import "time"
 
 // Temperature ...
 type Temperature struct {
-	TemperatureID       string          `json:"temperature_id" xml:"temperature_id"`
-	TemperatureValue    float64         `json:"temperature_value,string" xml:"temperature_value,string"`
-	TemperatureUnit     TemperatureUnit `json:"temperature_unit" xml:"temperature_unit"`
-	TemperatureFromDate time.Time       `json:"temperature_from_date" xml:"temperature_from_date"`
-	TemperatureTillDate time.Time       `json:"temperature_till_date" xml:"temperature_till_date"`
-	SensorID            string          `json:"sensor_id" xml:"sensor_id"`
-	CreationDate        *time.Time      `json:"creation_date" xml:"creation_date"`
-	UpdateDate          *time.Time      `json:"update_date" xml:"update_date"`
+	TemperatureID       string     `json:"temperature_id" xml:"temperature_id"`
+	TemperatureValue    float64    `json:"temperature_value,string" xml:"temperature_value,string"`
+	TemperatureFromDate time.Time  `json:"temperature_from_date" xml:"temperature_from_date"`
+	TemperatureTillDate time.Time  `json:"temperature_till_date" xml:"temperature_till_date"`
+	SensorID            string     `json:"sensor_id" xml:"sensor_id"`
+	CreationDate        *time.Time `json:"creation_date" xml:"creation_date"`
+	UpdateDate          *time.Time `json:"update_date" xml:"update_date"`
 }
 
-// TemperatureUnit of measurement for temperature
-type TemperatureUnit string
+func (t *Temperature) GetID() string {
+	return t.TemperatureID
+}
 
-const (
-	// TemperatureUnitCelsius indicates the temperature in Celsius
-	TemperatureUnitCelsius TemperatureUnit = "celsius"
+func (t *Temperature) GetSensorID() string {
+	return t.SensorID
+}
 
-	// TemperatureUnitFahrenheit indicates the temperature in Fahrenheit
-	TemperatureUnitFahrenheit = "fahrenheit"
-
-	// TemperatureUnitKelvin indicates the temperature in Kelvin
-	TemperatureUnitKelvin = "kelvin"
-)
+func (t *Temperature) GetValue() float64 {
+	return t.TemperatureValue
+}