Temperature monitoring for OPNSense and PRTG

Monitor temperatures on OPNSense without any external tools

Tested on

• OPNsense 26.1.8 / FreeBSD 14.3
• Should work on other BSD os if you have Python3 installed

Setup

Create a HTTP Push Data Advanced sensor in your PRTG and grab the Identification Token.

Download the files and restart configd service:

mkdir /var/script
curl -O https://raw.githubusercontent.com/stylersnico/prtg-opnsense-temperature/refs/heads/main/prtg_temps_sensor.py > /var/script/prtg_temps_sensor.py
curl -O https://raw.githubusercontent.com/stylersnico/prtg-opnsense-temperature/refs/heads/main/actions_push-prtg-temp.conf > /usr/local/opnsense/service/conf/actions.d/actions_push-prtg-temp.conf
service configd restart

Edit it to put your PRTG IP and Identification token at the beginning of /var/script/prtg_temps_sensor.py

Create a scheduled task that send the data every minute from GUI:

Screenshots