Random Sensor Readings

[diggs]

Hi all,

Not sure if this a domoticz or mysensor issue. Every once in a while I will get a random temp reading on my graph and I am not sure exactly how to go about tracking down the issue, so any advice appreciated. The sensor being used is a DS18B20 on a serial gateway to a PI. Normally if I lose radio connection the sensor data will flatline so the issue must be somewhere else. In this case it has dropped to zero degrees.

[AWI]

@diggs my blind conclusion would be that your sensor node is sending the wrong value. i.e. that it doesn't read the right (or no) value from the DS18B20..

[fleinze]

@diggs: This is definitely the sensor sending zero degree. I think a digital reading of zero also corresponds to 0 degree C.

[robosensor]

Dallas sensor reading code contains CRC checksum validation, so invalid readings from sensor should be skipped.

[diggs]

Thanks for the input all

I might put two sensors together and see what transpires to see if I can narrow things down a bit and see if it is specifically a sensor issue or the controller.