Technical Overview
The aim of the OpenTRV system is to reduce carbon emissions by intelligently controlling central heating systems
There are 3 main components to OpenTRV - they communicate over wireless RF
- Smart radiator valve actuators - fitted to radiator valve heads, running on batteries
- Boiler controller - listens for valves requesting heat
- Secure stats hub - listens to valves, gathers stats and can communicate with to a Raspberry Pi or PC
The different boards are powered by Amtel AVR ATMEGA microcontrollers (similar to Arduinos).
In terms of I/O, the boards use buttons, LEDs, temperature sensors, humidity sensors, light level sensors, relays, motors, serial communications and RFM23B radio transcievers to perform their tasks.
A Raspberry Pi can connect to the secure stats hub to provide more processor intensive tasks.
A single C++ generic code base is used across the AVR based boards - C style macros are used to tailor the binary to the functions required on the board and to conserve ROM space.