package sensor import ( "fmt" "sync" "git.cryptic.systems/volker.raschek/flucky/pkg/internal/format" "git.cryptic.systems/volker.raschek/flucky/pkg/types" "git.cryptic.systems/volker.raschek/go-dht" uuid "github.com/satori/go.uuid" ) // DHT11 is a sensor to measure humidity and temperature. type DHT11 struct { *types.Sensor mutex *sync.Mutex } // Read measured values func (dht11 *DHT11) Read() ([]*types.MeasuredValue, error) { // Lock multiple access dht11.mutex.Lock() defer dht11.mutex.Unlock() err := dht.HostInit() if err != nil { return nil, fmt.Errorf("Failed to initialize periph: %v", err) } dht, err := dht.NewDHT(dht11.GPIONumber, dht.Celsius, "") if err != nil { return nil, fmt.Errorf("Failed to initialize new DHT11 sensor: %v", err) } humidityValue, temperatureValue, err := dht.Read() if err != nil { return nil, fmt.Errorf("Read error: %v", err) } measuredValues := []*types.MeasuredValue{ { ID: uuid.NewV4().String(), Value: float64(humidityValue), ValueType: types.Humidity, Date: format.FormatedTime(), SensorID: dht11.ID, }, { ID: uuid.NewV4().String(), Value: float64(temperatureValue), ValueType: types.Temperature, Date: format.FormatedTime(), SensorID: dht11.ID, }, } return measuredValues, nil }