fix: temperature, sensor

changes:
- sensor temperature add
- sensor temperature list
- sensor temperature rm
- temperature get
- temperature log
- temperature push

Gopkg.lock

@@ -3,11 +3,11 @@
 
 [[projects]]
   branch = "master"
-  digest = "1:67bdb81292d46305e49b2c67585e9d4fbf6832aa86be02e27081fb3c171d6cdb"
+  digest = "1:fc0785e9dcf11c34eba33d5b308e5cdc47ef03a5fea6bb9e6bc55f9cbcaa70a6"
   name = "git.cryptic.systems/fh-trier/go-flucky-server"
   packages = ["pkg/types"]
   pruneopts = "UT"
-  revision = "71ed96f2661f290526cb151fd02a2c561452d6ae"
+  revision = "6ee773aeec13f439a8d963bf37d67999cbfcd85c"
 
 [[projects]]
   digest = "1:870d441fe217b8e689d7949fef6e43efbc787e50f200cb1e70dbca9204a1d6be"
@@ -41,6 +41,14 @@
   revision = "298182f68c66c05229eb03ac171abe6e309ee79a"
   version = "v1.0.3"
 
+[[projects]]
+  branch = "master"
+  digest = "1:5e110e5484070e6bd848e87039c68d477cd592ea06cbd20020fd5df58f8c0b5f"
+  name = "github.com/yryz/ds18b20"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "3cf383a406247c49e48a80014f3e17ddee418742"
+
 [solve-meta]
   analyzer-name = "dep"
   analyzer-version = 1
@@ -48,6 +56,7 @@
     "git.cryptic.systems/fh-trier/go-flucky-server/pkg/types",
     "github.com/satori/go.uuid",
     "github.com/spf13/cobra",
+    "github.com/yryz/ds18b20",
   ]
   solver-name = "gps-cdcl"
   solver-version = 1

cmd/cmd.go

@@ -3,6 +3,8 @@ package cmd
 import (
 	"git.cryptic.systems/fh-trier/go-flucky/cmd/config"
 	"git.cryptic.systems/fh-trier/go-flucky/cmd/remote"
+	"git.cryptic.systems/fh-trier/go-flucky/cmd/sensor"
+	"git.cryptic.systems/fh-trier/go-flucky/cmd/temperature"
 	"github.com/spf13/cobra"
 )
 
@@ -21,7 +23,8 @@ func Execute(version string) {
 
 	config.InitCmd(rootCmd, configDir)
 	remote.InitCmd(rootCmd, configDir)
-	//temperature.InitCmd(rootCmd)
+	sensor.InitCmd(rootCmd, configDir)
+	temperature.InitCmd(rootCmd, configDir)
 
 	rootCmd.Execute()
 }

cmd/config/config.go

@@ -8,7 +8,7 @@ var configDir string
 
 var configCmd = &cobra.Command{
 	Use:   "config",
-	Short: "config",
+	Short: "Manage configuration",
 }
 
 func InitCmd(cmd *cobra.Command, c string) {

cmd/remote/register.go

@@ -7,12 +7,14 @@ import (
 	"github.com/spf13/cobra"
 )
 
+var force bool
+
 var registerRemoteCmd = &cobra.Command{
 	Use:   "register",
 	Short: "register on remote servers",
 	Run: func(cmd *cobra.Command, args []string) {
 
-		if err := remote.SendDevice(configDir); err != nil {
+		if err := remote.RegisterDevice(configDir, force); err != nil {
 			log.Fatal(err)
 		}
 	},
@@ -20,4 +22,5 @@ var registerRemoteCmd = &cobra.Command{
 
 func init() {
 	remoteCmd.AddCommand(registerRemoteCmd)
+	registerRemoteCmd.Flags().BoolVarP(&force, "force", "f", false, "Force register on a remote server")
 }

cmd/remote/remote.go

@@ -8,11 +8,11 @@ var configDir string
 
 var remoteCmd = &cobra.Command{
 	Use:   "remote",
-	Short: "remote",
+	Short: "Manage Remote",
 }
 
-func InitCmd(cmd *cobra.Command, c string) {
+func InitCmd(cmd *cobra.Command, cnf string) {
-	configDir = c
+	configDir = cnf
 
 	cmd.AddCommand(remoteCmd)
 }

cmd/sensor/sensor.go

@@ -0,0 +1,23 @@
+package sensor
+
+import (
+	"git.cryptic.systems/fh-trier/go-flucky/cmd/sensor/temperature"
+	"github.com/spf13/cobra"
+)
+
+var configDir string
+
+var sensorCmd = &cobra.Command{
+	Use:   "sensor",
+	Short: "Manage Sensors",
+}
+
+// Execute a
+func InitCmd(cmd *cobra.Command, cnf string) {
+	configDir = cnf
+
+	cmd.AddCommand(sensorCmd)
+
+	temperature.InitCmd(sensorCmd, cnf)
+
+}

cmd/sensor/temperature/add.go

@@ -0,0 +1,24 @@
+package temperature
+
+import (
+	"log"
+
+	"git.cryptic.systems/fh-trier/go-flucky/pkg/sensor"
+	"github.com/spf13/cobra"
+)
+
+var addTemperatureSensorCmd = &cobra.Command{
+	Use:   "add",
+	Short: "Add Temperature Sensor",
+	Args:  cobra.ExactArgs(1),
+	Run: func(cmd *cobra.Command, args []string) {
+
+		if err := sensor.AddTemperature(args[0], sensorName, configDir, wirePath); err != nil {
+			log.Fatal(err)
+		}
+	},
+}
+
+func init() {
+	temperatureSensorCmd.AddCommand(addTemperatureSensorCmd)
+}

cmd/sensor/temperature/list.go

@@ -0,0 +1,28 @@
+package temperature
+
+import (
+	"log"
+	"os"
+
+	"git.cryptic.systems/fh-trier/go-flucky/pkg/sensor"
+	"github.com/spf13/cobra"
+)
+
+var quiet bool
+
+var listTemperatureSensorCmd = &cobra.Command{
+	Use:   "list",
+	Short: "List Temperature Sensors",
+	Run: func(cmd *cobra.Command, args []string) {
+
+		if err := sensor.PrintTemperature(os.Stdout, configDir, quiet); err != nil {
+			log.Fatal(err)
+		}
+	},
+}
+
+func init() {
+	temperatureSensorCmd.AddCommand(listTemperatureSensorCmd)
+
+	listTemperatureSensorCmd.Flags().BoolVarP(&quiet, "quiet", "q", false, "List only sensor id's")
+}

cmd/sensor/temperature/rm.go

@@ -0,0 +1,24 @@
+package temperature
+
+import (
+	"log"
+
+	"git.cryptic.systems/fh-trier/go-flucky/pkg/sensor"
+	"github.com/spf13/cobra"
+)
+
+var rmTemperatureSensorCmd = &cobra.Command{
+	Use:   "rm",
+	Short: "Remove Temperature Sensor",
+	Args:  cobra.ExactArgs(1),
+	Run: func(cmd *cobra.Command, args []string) {
+
+		if err := sensor.RemoveTemperature(args[0], configDir); err != nil {
+			log.Fatal(err)
+		}
+	},
+}
+
+func init() {
+	temperatureSensorCmd.AddCommand(rmTemperatureSensorCmd)
+}

cmd/sensor/temperature/temperature.go

@@ -0,0 +1,22 @@
+package temperature
+
+import (
+	"github.com/spf13/cobra"
+)
+
+var configDir, sensorName, wirePath string
+
+var temperatureSensorCmd = &cobra.Command{
+	Use:   "temperature",
+	Short: "Manage Temperature Sensors",
+}
+
+// Execute a
+func InitCmd(cmd *cobra.Command, cnf string) {
+	configDir = cnf
+
+	cmd.AddCommand(temperatureSensorCmd)
+	temperatureSensorCmd.PersistentFlags().StringVarP(&sensorName, "name", "n", "", "Define an name for the sensor")
+	temperatureSensorCmd.PersistentFlags().StringVarP(&wirePath, "wire-path", "w", "/sys/bus/w1/devices", "Default path for wire devices")
+
+}

cmd/temperature/get.go

@@ -1,4 +1,4 @@
-package remote
+package temperature
 
 import (
 	"log"
@@ -8,13 +8,15 @@ import (
 	"github.com/spf13/cobra"
 )
 
+var push bool
+
 var getTemperatureCmd = &cobra.Command{
 	Use:   "get",
 	Short: "get temperature from sensor",
-	//	Args:  cobra.ExactArgs(2),
+	Args:  cobra.ExactArgs(1),
 	Run: func(cmd *cobra.Command, args []string) {
 
-		if err := temperature.Get(os.Stdout); err != nil {
+		if err := temperature.Get(os.Stdout, args[0], configDir); err != nil {
 			log.Fatal(err)
 		}
 	},

cmd/temperature/logs.go

@@ -0,0 +1,27 @@
+package temperature
+
+import (
+	"log"
+	"os"
+
+	"git.cryptic.systems/fh-trier/go-flucky/pkg/temperature"
+	"github.com/spf13/cobra"
+)
+
+//var seconds int32
+
+var logTemperatureCmd = &cobra.Command{
+	Use:   "logs",
+	Short: "logs print all temperatures from all sensors",
+	Run: func(cmd *cobra.Command, args []string) {
+
+		if err := temperature.Logs(os.Stdout, configDir); err != nil {
+			log.Fatal(err)
+		}
+	},
+}
+
+func init() {
+	temperatureCmd.AddCommand(logTemperatureCmd)
+	//logTemperatureCmd.Flags().Int32VarP(&seconds, "seconds", "s", 1, "Interval to print new temperatures from sensors")
+}

cmd/temperature/push.go

@@ -0,0 +1,24 @@
+package temperature
+
+import (
+	"log"
+
+	"git.cryptic.systems/fh-trier/go-flucky/pkg/temperature"
+	"github.com/spf13/cobra"
+)
+
+var pushTemperatureCmd = &cobra.Command{
+	Use:   "push",
+	Short: "push temperature from sensor to remote servers",
+	Args:  cobra.ExactArgs(1),
+	Run: func(cmd *cobra.Command, args []string) {
+
+		if err := temperature.Push(args[0], configDir); err != nil {
+			log.Fatal(err)
+		}
+	},
+}
+
+func init() {
+	temperatureCmd.AddCommand(pushTemperatureCmd)
+}

cmd/temperature/temperature.go

@@ -1,16 +1,19 @@
-package remote
+package temperature
 
 import (
 	"github.com/spf13/cobra"
 )
 
+var configDir string
+
 var temperatureCmd = &cobra.Command{
 	Use:   "temperature",
 	Short: "Read temperature from sensor",
 }
 
 // Execute a
-func Init(cmd *cobra.Command) {
+func InitCmd(cmd *cobra.Command, cnf string) {
+	configDir = cnf
 
 	cmd.AddCommand(temperatureCmd)
 

pkg/config/config.go

@@ -22,7 +22,6 @@ func Create(configDir string, force bool) error {
 	}
 
 	// If no config file exists, create a new one on the location
-
 	if !force {
 		if _, err := os.Stat(configPath); !os.IsNotExist(err) {
 			return fmt.Errorf("%v already exists. Use -f to overwrite", configPath)
@@ -54,7 +53,7 @@ func Read(configDir string) (*types.Config, error) {
 
 	var config types.Config
 
-	// If no config file exists, create a new one on the location
+	// If no config file exists, return an error
 	if _, err := os.Stat(configPath); os.IsNotExist(err) {
 		return nil, fmt.Errorf("Can not find config %v: %v", configPath, err)
 	}
@@ -78,7 +77,7 @@ func Write(config *types.Config, configDir string) error {
 
 	configPath := filepath.Join(configDir, configFilename)
 
-	// If no config file exists, create a new one on the location
+	// If no config file exists, return an error
 	if _, err := os.Stat(configPath); os.IsNotExist(err) {
 		return fmt.Errorf("Can not find config %v: %v", configPath, err)
 	}

pkg/remote/remote.go

@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"fmt"
 	"io"
+	"io/ioutil"
 	"net/http"
 	"text/tabwriter"
 
@@ -44,10 +45,10 @@ func List(w io.Writer, configDir string) error {
 
 	tw := tabwriter.NewWriter(w, 0, 0, 5, ' ', 0)
 
-	fmt.Fprint(tw, "name\taddress\n")
+	fmt.Fprint(tw, "name\taddress\tregistered\n")
 
 	for _, remote := range configuration.Remotes {
-		fmt.Fprintf(tw, "%v\t%v\n", remote.Name, remote.Address)
+		fmt.Fprintf(tw, "%v\t%v\t%v\n", remote.Name, remote.Address, remote.Registered)
 	}
 
 	tw.Flush()
@@ -123,7 +124,11 @@ func SendTemperature(temperature *stypes.Temperature, configDir string) error {
 		defer resp.Body.Close()
 
 		if resp.StatusCode < 200 || resp.StatusCode > 299 {
-			return fmt.Errorf("Invalid HTTP-Statuscode - expected 200, got %d", resp.StatusCode)
+			b, err := ioutil.ReadAll(resp.Body)
+			if err != nil {
+				return fmt.Errorf("Invalid HTTP-Statuscode - expected 200, got %d - can not read response body: %v", resp.StatusCode, err)
+			}
+			return fmt.Errorf("Invalid HTTP-Statuscode - expected 200, got %d: %v", resp.StatusCode, string(b))
 		}
 	}
 
@@ -131,8 +136,8 @@ func SendTemperature(temperature *stypes.Temperature, configDir string) error {
 
 }
 
-// SendDevice ..
+// RegisterDevice ..
-func SendDevice(configDir string) error {
+func RegisterDevice(configDir string, force bool) error {
 	con, err := config.Read(configDir)
 	if err != nil {
 		return err
@@ -145,6 +150,7 @@ func SendDevice(configDir string) error {
 	device.EncodeToJSON(&buffer)
 
 	for _, remote := range con.Remotes {
+		if !remote.Registered || force {
 			requestURL := fmt.Sprintf("%s%s", remote.Address, "/devices")
 			req, err := http.NewRequest("POST", requestURL, &buffer)
 			if err != nil {
@@ -159,9 +165,24 @@ func SendDevice(configDir string) error {
 			defer resp.Body.Close()
 
 			if resp.StatusCode < 200 || resp.StatusCode > 299 {
-			return fmt.Errorf("Invalid HTTP-Statuscode - expected 200, got %d", resp.StatusCode)
+				b, err := ioutil.ReadAll(resp.Body)
+				if err != nil {
+					return fmt.Errorf("Invalid HTTP-Statuscode - expected 200, got %d - can not read response body: %v", resp.StatusCode, err)
 				}
+				return fmt.Errorf("Invalid HTTP-Statuscode - expected 200, got %d: %v", resp.StatusCode, string(b))
+			}
+			remote.Registered = true
+		}
+	}
+
+	if err := config.Write(con, configDir); err != nil {
+		return err
 	}
 
 	return nil
 }
+
+func UnregisterDevice(configDir string) error {
+
+	return nil
+}

pkg/sensor/sensor.go

@@ -0,0 +1,14 @@
+package sensor
+
+import (
+	"os"
+	"path/filepath"
+)
+
+func sensorExists(wirePath, sensorID string) bool {
+	sensorPath := filepath.Join(wirePath, sensorID)
+	if _, err := os.Stat(sensorPath); os.IsNotExist(err) {
+		return false
+	}
+	return true
+}

pkg/sensor/temperature.go

@@ -0,0 +1,99 @@
+package sensor
+
+import (
+	"fmt"
+	"io"
+	"path/filepath"
+	"text/tabwriter"
+
+	"git.cryptic.systems/fh-trier/go-flucky/pkg/config"
+	"git.cryptic.systems/fh-trier/go-flucky/pkg/types"
+)
+
+func AddTemperature(sensorID, sensorName, configDir, wirePath string) error {
+
+	// read cnf file
+	cnf, err := config.Read(configDir)
+	if err != nil {
+		return err
+	}
+
+	// check if sensor exists
+	if !sensorExists(wirePath, sensorID) {
+		return fmt.Errorf("Can not find sensor: %v", filepath.Join(wirePath, sensorID))
+	}
+
+	temperatureSensor := &types.WireSensor{
+		ID:       sensorID,
+		Name:     sensorName,
+		WirePath: wirePath,
+	}
+
+	// append sensor to list
+	cnf.TemperatureSensors = append(cnf.TemperatureSensors, temperatureSensor)
+
+	// write cnf file
+	if err := config.Write(cnf, configDir); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func PrintTemperature(w io.Writer, configDir string, quiet bool) error {
+
+	// read cnf file
+	cnf, err := config.Read(configDir)
+	if err != nil {
+		return err
+	}
+
+	// declar tabwriter
+	tw := tabwriter.NewWriter(w, 0, 0, 5, ' ', 0)
+
+	// headline
+	if !quiet {
+		fmt.Fprint(tw, "id\tname\tpath\n")
+	}
+
+	for _, sensor := range cnf.TemperatureSensors {
+		if quiet {
+			fmt.Fprintf(tw, "%v\n", sensor.ID)
+		} else {
+			fmt.Fprintf(tw, "%v\t%v\t%v\n", sensor.ID, sensor.Name, sensor.WirePath)
+		}
+	}
+
+	tw.Flush()
+
+	return nil
+}
+
+func RemoveTemperature(sensorID, configDir string) error {
+
+	// read cnf file
+	cnf, err := config.Read(configDir)
+	if err != nil {
+		return err
+	}
+
+	// remove matching sensor ids
+	var j int
+	for _, sensor := range cnf.TemperatureSensors {
+		if sensor.ID == sensorID {
+			cnf.TemperatureSensors = append(cnf.TemperatureSensors[:j], cnf.TemperatureSensors[j+1:]...)
+			if j > 0 {
+				j = j - 1
+			}
+			continue
+		}
+		j++
+	}
+
+	// write cnf file
+	if err := config.Write(cnf, configDir); err != nil {
+		return err
+	}
+
+	return nil
+}

pkg/temperature/temperature.go

@@ -1,10 +1,146 @@
 package temperature
 
 import (
+	"fmt"
 	"io"
+	"log"
+	"os"
+	"os/signal"
+	"syscall"
+	"text/tabwriter"
+	"time"
+
+	stypes "git.cryptic.systems/fh-trier/go-flucky-server/pkg/types"
+	"git.cryptic.systems/fh-trier/go-flucky/pkg/remote"
+	"git.cryptic.systems/fh-trier/go-flucky/pkg/types"
+
+	"git.cryptic.systems/fh-trier/go-flucky/pkg/config"
+
+	uuid "github.com/satori/go.uuid"
+	"github.com/yryz/ds18b20"
 )
 
-func Get(w io.Writer) error {
+// Get ...
+func Get(w io.Writer, sensorName string, configDir string) error {
+
+	temperature, err := getTemperature(sensorName, configDir)
+	if err != nil {
+		return err
+	}
+
+	fmt.Fprintf(w, "%3.3f\n", temperature.TemperatureValue)
+	return nil
+
+}
+
+// Logs ...
+func Logs(w io.Writer, configDir string) error {
+
+	// get cnf
+	cnf, err := config.Read(configDir)
+	if err != nil {
+		return err
+	}
+
+	// declar tabwriter
+	tw := tabwriter.NewWriter(w, 0, 0, 5, ' ', 0)
+
+	// headlines
+	for _, sensor := range cnf.TemperatureSensors {
+		if sensor.Name != "" {
+			fmt.Fprintf(tw, "%v\t", sensor.Name)
+		} else {
+			fmt.Fprintf(tw, "%v\t", sensor.ID)
+		}
+
+	}
+	fmt.Fprint(tw, "\n")
+
+	// body
+	ticker := time.NewTicker(1 * time.Second)
+
+	go func() {
+		for {
+			select {
+			case _, more := <-ticker.C:
+				if !more {
+					return
+				}
+
+				for _, sensor := range cnf.TemperatureSensors {
+					temperature, err := ds18b20.Temperature(sensor.ID)
+					if err != nil {
+						return
+					}
+					fmt.Fprintf(tw, "%3.3f°\t", temperature)
+				}
+
+				fmt.Fprint(tw, "\n")
+
+				tw.Flush()
+
+			}
+		}
+	}()
+
+	signalChannel := make(chan os.Signal)
+	signal.Notify(signalChannel, syscall.SIGINT, syscall.SIGTERM)
+
+	sig := <-signalChannel
+	log.Printf("Got signal %s, initiating shutdown\n", sig)
+	ticker.Stop()
 
 	return nil
 }
+
+// Push ...
+func Push(sensorName, configDir string) error {
+
+	temperature, err := getTemperature(sensorName, configDir)
+	if err != nil {
+		return err
+	}
+
+	if err := remote.SendTemperature(&temperature, configDir); err != nil {
+		return err
+	}
+
+	return nil
+
+}
+
+func getTemperature(sensorName, configDir string) (stypes.Temperature, error) {
+	cnf, err := config.Read(configDir)
+	if err != nil {
+		return stypes.Temperature{}, err
+	}
+
+	var foundSensor types.WireSensor
+	var sensorFound bool
+	for _, sensor := range cnf.TemperatureSensors {
+		if sensor.ID == sensorName || sensor.Name == sensorName {
+			foundSensor = *sensor
+			sensorFound = true
+			break
+		}
+	}
+
+	if !sensorFound {
+		return stypes.Temperature{}, fmt.Errorf("Sensor not found sensor %v in config", sensorName)
+	}
+
+	t, err := ds18b20.Temperature(foundSensor.ID)
+	if err != nil {
+		return stypes.Temperature{}, fmt.Errorf("Can not read temperature from sensor %v: %v", foundSensor.ID, err)
+	}
+
+	temperature := stypes.Temperature{
+		TemperatureID:    uuid.NewV4().String(),
+		TemperatureValue: t,
+		SensorID:         foundSensor.ID,
+		TemperatureDate:  time.Now(),
+		DeviceID:         cnf.DeviceID,
+	}
+
+	return temperature, nil
+}

pkg/types/types.go

@@ -10,6 +10,7 @@ import (
 type Config struct {
 	DeviceID           string        `json:"device_id"`
 	Remotes            []*Remote     `json:"remotes"`
+	TemperatureSensors []*WireSensor `json:"temperature_sensors"`
 }
 
 func (c *Config) ToJSON() (string, error) {
@@ -45,4 +46,11 @@ func (c *Config) JSONDecoder(r io.Reader) error {
 type Remote struct {
 	Name       string `json:"remote_name"`
 	Address    string `json:"remote_address"`
+	Registered bool   `json:"remote_registered"`
+}
+
+type WireSensor struct {
+	ID       string `json:"sensor_id"`
+	Name     string `json:"sensor_name"`
+	WirePath string `json:"wire_path"`
 }

vendor/git.cryptic.systems/fh-trier/go-flucky-server/pkg/types/types.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
+	"time"
 )
 
 // TypeObject ...
@@ -15,6 +16,7 @@ type TypeObject interface {
 // Device ...
 type Device struct {
 	DeviceID     string    `json:"device_id"`
+	CreationDate time.Time `json:"creation_date"`
 }
 
 // EncodeToJson needs a writer to write the struct into json string
@@ -40,9 +42,11 @@ func (d *Device) DecodeFromJSON(r io.Reader) error {
 // Humidity ...
 type Humidity struct {
 	HumidityID    string      `json:"humidity_id"`
-	HumidityValue string `json:"humidity_value"`
+	HumidityValue json.Number `json:"humidity_value"`
-	HumidityDate  string `json:"humidity_date"`
+	HumidityDate  time.Time   `json:"humidity_date"`
+	SensorID      string      `json:"sensor_id"`
 	DeviceID      string      `json:"device_id"`
+	CreationDate  time.Time   `json:"creation_date"`
 }
 
 // EncodeToJson needs a writer to write the struct into json string
@@ -68,9 +72,11 @@ func (h *Humidity) DecodeFromJSON(r io.Reader) error {
 // Temperature ...
 type Temperature struct {
 	TemperatureID    string    `json:"temperature_id"`
-	TemperatureValue string `json:"temperature_value"`
+	TemperatureValue float64   `json:"temperature_value,string"`
-	TemperatureDate  string `json:"temperature_date"`
+	TemperatureDate  time.Time `json:"temperature_date"`
+	SensorID         string    `json:"sensor_id"`
 	DeviceID         string    `json:"device_id"`
+	CreationDate     time.Time `json:"creation_date"`
 }
 
 // EncodeToJson needs a writer to write the struct into json string

vendor/github.com/yryz/ds18b20/.gitignore

@@ -0,0 +1,24 @@
+# Compiled Object files, Static and Dynamic libs (Shared Objects)
+*.o
+*.a
+*.so
+
+# Folders
+_obj
+_test
+
+# Architecture specific extensions/prefixes
+*.[568vq]
+[568vq].out
+
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+
+_testmain.go
+
+*.exe
+*.test
+*.prof

vendor/github.com/yryz/ds18b20/LICENSE

@@ -0,0 +1,201 @@
+                                 Apache License
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+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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+   limitations under the License.

vendor/github.com/yryz/ds18b20/README.md

@@ -0,0 +1,53 @@
+# ds18b20
+
+Get sensor data from ds18b20 connected to the Raspberry (GPIO w1 pin).
+
+## Usage
+
+### Connect DS18B20
+On the Raspberry Pi, you will need to add `dtoverlay=w1-gpio"` (for regular connection) or `dtoverlay=w1-gpio,pullup="y"` (for parasitic connection) to your /boot/config.txt. The default data pin is GPIO4 (RaspPi connector pin 7), but that can be changed from 4 to `x` with `dtoverlay=w1-gpio,gpiopin=x`.
+
+Here's what I did:
+```
+sudo echo dtoverlay=w1-gpio-pullup,gpiopin=4 >> /boot/config.txt
+sudo modprobe w1_gpio && sudo modprobe w1_therm
+```
+
+### Drivers
+
+1-Wire drivers need to be loaded in order to create the connection between the physical sensor and the rPI.
+You can load them from the terminal (or from the bin/modules.sh script).
+
+    sudo modprobe wire
+    sudo modprobe w1-gpio
+    sudo modprobe w1-therm
+
+### Install
+    go get github.com/yryz/ds18b20
+
+### Code
+```go
+package main
+
+import (
+    "fmt"
+
+    "github.com/yryz/ds18b20"
+)
+
+func main() {
+    sensors, err := ds18b20.Sensors()
+    if err != nil {
+        panic(err)
+    }
+
+    fmt.Printf("sensor IDs: %v\n", sensors)
+
+    for _, sensor := range sensors {
+        t, err := ds18b20.Temperature(sensor)
+        if err == nil {
+            fmt.Printf("sensor: %s temperature: %.2f°C\n", sensor, t)
+        }
+    }
+}
+```

vendor/github.com/yryz/ds18b20/ds18b20.go

@@ -0,0 +1,49 @@
+// Copyright 2016 yryz Author. All Rights Reserved.
+
+package ds18b20
+
+import (
+	"errors"
+	"io/ioutil"
+	"strconv"
+	"strings"
+)
+
+var ErrReadSensor = errors.New("failed to read sensor temperature")
+
+// Sensors get all connected sensor IDs as array
+func Sensors() ([]string, error) {
+	data, err := ioutil.ReadFile("/sys/bus/w1/devices/w1_bus_master1/w1_master_slaves")
+	if err != nil {
+		return nil, err
+	}
+
+	sensors := strings.Split(string(data), "\n")
+	if len(sensors) > 0 {
+		sensors = sensors[:len(sensors)-1]
+	}
+
+	return sensors, nil
+}
+
+// Temperature get the temperature of a given sensor
+func Temperature(sensor string) (float64, error) {
+	data, err := ioutil.ReadFile("/sys/bus/w1/devices/" + sensor + "/w1_slave")
+	if err != nil {
+		return 0.0, ErrReadSensor
+	}
+
+	raw := string(data)
+
+	i := strings.LastIndex(raw, "t=")
+	if i == -1 {
+		return 0.0, ErrReadSensor
+	}
+
+	c, err := strconv.ParseFloat(raw[i+2:len(raw)-1], 64)
+	if err != nil {
+		return 0.0, ErrReadSensor
+	}
+
+	return c / 1000.0, nil
+}