DS18B20 OneWire -127 error with sonoff th16
Posted: Tue Jan 08, 2019 12:59 pmHi,
Got strange inconsistent problem with DS18B20 OneWire and esp8266. Inside it’s working fine but outside putting the sensor in the pond I get frequent error -127 reading. I can filter out but would like to get idea if someone knows why. Can it be a ground issue? The sonoff th16 got none and the pond of course has one via the pump. Can this cause the crc errors. Can temp outside pull down more voltage so the parasite voltage is going down more resulting in less voltage for the sensor? Is the wifi asking more amps outside due to temp or range and pulling down gpio? Any clues?
Frank
Got strange inconsistent problem with DS18B20 OneWire and esp8266. Inside it’s working fine but outside putting the sensor in the pond I get frequent error -127 reading. I can filter out but would like to get idea if someone knows why. Can it be a ground issue? The sonoff th16 got none and the pond of course has one via the pump. Can this cause the crc errors. Can temp outside pull down more voltage so the parasite voltage is going down more resulting in less voltage for the sensor? Is the wifi asking more amps outside due to temp or range and pulling down gpio? Any clues?
Frank