Temperature sensing

The emonPi supports temperature sensing using DS18B20 one-wire digital temperature sensors. The standard firmware on the emonPi supports up to 6x temperature sensors.

The emonPi has a special RJ45 socket to which either a single RJ45 DS18B20 temperature sensor can be connected directly or multiple sensors can be connected via either a RJ45 breakout board or terminal block breakout board.

Example: 4x temperature sensors and a RJ45 breakout

RJ45 Pinout

The RJ45 implements a standard pinout used by other manufacturers of DS18B20 temperate sensing hardware such as Sheepwalk Electronics.

Note: The RJ45 socket does not support power supply switching via Dig19 (ADC5) as described above.

Further reading

If you are using temperature sensors with heating systems such as heat pumps the following blog post by John Cantor provides a number of useful mounting suggestions: John Cantor’s Blog: Temperature sensors for monitoring heat pumps