I have problem with minus value. I monitor outdoor temperature and if value in minus, graph show 0.
I'm using standart SNMP - Generic OID Template and grabing informations from GIOM 3000 meteostation via SNMP. I can not find this value anywhere I'm using SNMP - Generic OID Template, because it's simple 
Problem you can see here:
http://79.98.74.161/meteo/grafy/graphs/graph_15_1.png