Most DS18B20 are faked and out of specifications.
A new code is in development, that build the average of the connected sensors and add an offset to every sensor. After the calibration, all sensors will show the same value.
Calibration will be initiate by a published MQTT message.
You have to bring all connected sensors to the same environment, wait a little bit and send the calibration message.
Next step is calibration to a connected BME280 or a transmitted value.
Most DS18B20 are faked and out of specifications. A new code is in development, that build the average of the connected sensors and add an offset to every sensor. After the calibration, all sensors will show the same value. Calibration will be initiate by a published MQTT message. You have to bring all connected sensors to the same environment, wait a little bit and send the calibration message.
Next step is calibration to a connected BME280 or a transmitted value.
Originally posted by @Zeppelin500 in https://github.com/Zeppelin500/MBusino/discussions/8