d2r2/go-aosong

Golang library to interact with humidity and temperature Aosong Electronics DHT12/AM2320 sensors working via i2c-bus

go-aosong's Issues

CRCs doesn't match

Code:

const i2CAddress = 0x5c
const i2CBus = 1

// Server struct
type Server struct {
	Sensor *aosong.Sensor
	I2C    *i2c.I2C
}
func main() {
        var err error
	s := Server{Sensor: aosong.NewSensor(aosong.AM2320)}
	s.I2C, err = i2c.NewI2C(i2CAddress, i2CBus)
	if err != nil {
		log.Printf(err.Error())
	}
	fmt.Println(s.Sensor.ReadRelativeHumidityAndTemperature(s.I2C))
	defer s.I2C.Close()
}

Debug info:

2019-02-12T10:29:19.692 [     i2c] DEBUG  Write 3 hex bytes: [030004]
2019-02-12T10:29:19.697 [     i2c] DEBUG  Read 8 hex bytes: [0304012500d92045]
2019-02-12T10:29:19.698 [     i2c] DEBUG  Read 8 hex bytes: [0000000000000000]
CRCs doesn't match: CRC from sensor(0) != calculated CRC(6912)

Any ideea why the CRC from sensor is 0?
I am able to read the sensor on the same bus with the same address with a python script.