Owl micro+ Wireless electricity monitor runs on Oregon Scientific V3 protocol.
After buying one of those wonderful little devices to study the energy consumed at home, i browsed the internet to find a way to decode frames sent by the transmitter (CMR180) but I have not found any application describing the coding system of the data within the radio frames. So I decided to study the radio packets to decode the system.
Code available for RaspberryPi and Arduino.
Load arduino sketch to run a mini Owl Micro+ energy monitor as shown on the picture above.(https://raw.github.com/onlinux/OWLCMR180/master/arduino/oregon_owl.ino)