Category Archive for: ‘RRD Tool’

Monitoring temperatures using FHEM, RRDTool, PHP & JavaScript

My Household Temperature Graphs page displays various statistics from my heating system. In this post, I explain how I produce these graphs using a combination of FHEM, PHP and RRDTool. The heating system is based on a number of these Conrad FHT 80 BTFN sets. The programmer controls the actuator via 868Mhz RF and the signal is received by an …

Read More