Markus Pesch
dbef4f8241
changes: - Only one storage endpoint can be defined. This consists of a URL which can be used to specify whether the data is to be stored in a file or in a database.
101 lines
2.4 KiB
Go
101 lines
2.4 KiB
Go
package sensor
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"sync"
|
|
|
|
"github.com/go-flucky/flucky/pkg/internal/format"
|
|
"github.com/go-flucky/flucky/pkg/types"
|
|
"github.com/go-flucky/go-dht"
|
|
uuid "github.com/satori/go.uuid"
|
|
)
|
|
|
|
// DHT22 is a sensor to measure humidity and temperature.
|
|
type DHT22 struct {
|
|
*types.Sensor
|
|
}
|
|
|
|
// GetSensorModel returns the sensor model
|
|
func (s *DHT22) GetSensorModel() types.SensorModel {
|
|
return s.Sensor.SensorModel
|
|
}
|
|
|
|
// Read measured values
|
|
func (s *DHT22) Read() ([]*types.MeasuredValue, 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)
|
|
}
|
|
|
|
humidityValue, temperatureValue, err := dht.Read()
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Read error: %v", err)
|
|
}
|
|
|
|
measuredValues := []*types.MeasuredValue{
|
|
&types.MeasuredValue{
|
|
ID: uuid.NewV4().String(),
|
|
Value: float64(humidityValue),
|
|
ValueType: types.MeasuredValueTypeHumidity,
|
|
FromDate: format.FormatedTime(),
|
|
TillDate: format.FormatedTime(),
|
|
SensorID: s.SensorID,
|
|
},
|
|
&types.MeasuredValue{
|
|
ID: uuid.NewV4().String(),
|
|
Value: float64(temperatureValue),
|
|
ValueType: types.MeasuredValueTypeTemperature,
|
|
FromDate: format.FormatedTime(),
|
|
TillDate: format.FormatedTime(),
|
|
SensorID: s.SensorID,
|
|
},
|
|
}
|
|
|
|
return measuredValues, nil
|
|
}
|
|
|
|
// 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()
|
|
}
|
|
|
|
measuredValues, err := s.Read()
|
|
if err != nil {
|
|
errorChannel <- err
|
|
return
|
|
}
|
|
|
|
for _, measuredValue := range measuredValues {
|
|
measuredValueChannel <- measuredValue
|
|
}
|
|
|
|
}
|
|
|
|
// 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.ReadChannel(measuredValueChannel, errorChannel, nil)
|
|
}
|
|
}
|
|
}
|