I just implemented a manual check under Setup > Services > Other services > Integrate Nagios plugins
Command line: check_snmp -H $HOSTADDRESS$ -C SNMP-Community -P 2c -o .1.3.6.1.4.1.2011.5.25.31.1.1.1.1.11.16842753 -u “°C” -c 50 -w 40
This way I get the data I want, although I’m sure there are more elegant ways 