Include Raspberry Pi System Temperature in openHAB

Fri, 13 May 2016 14:00:00 +0000

(This post is also contributed to the openHAB wiki)

The Systeminfo Binding enables you to read system information through Sigar. The system information provided through this library can be extended with some additional important features. For example, reading system temperatures for your Raspberry Pi.

CPU temperature

The CPU temperature can be read with a terminal command:

$ cat /sys/class/thermal/thermal_zone0/temp
46540

This output can be captured using the Exec binding. The value returned represents millidegrees Celsius. (I’m not sure if another OS localization returns Fahrenheit). So the actual needed CPU temperature is computed through a Javascript transformation.

My First Raspberry Pi

Fri, 03 Apr 2015 06:57:08 +0000

Earlier this week my first Raspberry Pi arrived by mail. What a great little device. I intend to use it to replace my Mac Mini. That Mac is currently running an openHAB server. Where the previous model B was said to be somewhat slow for larger openHAB installations, the hardware specs of this new Raspberry Pi 2 model B have increased. I expect it to be faster and fast enough for my purposes.

Raspberry Pi on Robert van Bregt

Include Raspberry Pi System Temperature in openHAB

CPU temperature

My First Raspberry Pi