Sonic-Amiga/DEVIComm

Demonstration of communication with DEVIReg Smart floor heating thermostat

Introduction

This project is a demostration application, which connects to DEVIReg Smart floor heating thermostat (https://www.devismart.com/ and is able to dump state and send commands.

Legal notice

This project is based on original demo code, released on github by Trifork (https://github.com/trifork/secure-device-grid). According to their license, this code and accompanying library in binary form can be used for evaluation purposes only. Using it in a produce requires a license. Original description from original authors is preserved in README-original.md file, please refer for more information.

I, the author of changes to original Trifork demo code, have no affitiations with either Trifork or Danfoss companies. This work is being done in my private time on behalf of my own purely for evaluation and research purposes. No commercial interests are being (or will be) pursued. My contact email is pavel_fedin@mail.ru.

Acknowledgements

The code and auxilary tools in this repository also use:

• JSMN JSON parser by Serge Zaitsev: https://zserge.com/jsmn/
• Python protobuf decoder: https://github.com/nevermoe/protobuf-decoder

How to use

1. Build and run the demo application.
2. On your smartphone or tablet in DEVIReg^TM Smart application choose "Share house" function. Answer anything to the question whether the new user is allowed to add or delete users and get the pairing code.
3. In the demo app command line execute "/pair " command. Use the code, supplied by the DEVIReg^TM Smart application, enter it as just
   numbers without dashes.
4. The demo application will receive thermostat IDs from your smartphone. The smartphone will also take care about registering the new user on thermostats. The demo application presents itself as "DEVIComm test" user. You will be able to list them using "/lp" command. It will also remember ID of the smartphone.
5. Execute "/pcr " command in order to connect to a thermostat. After successful connection the demo application will decode and display all the incoming data. The thermostat automatically fully dumps its configuration and then keeps on sending updates, if there are any.
6. At the moment you can only send raw hexadecimal commands to the thermostat using "/send-hex" command. However i have not tested it. Be careful and know what you are doing. I have a suggestion that it is extremely easy to crash the thermostat and even perhaps brick it by carelessly doing a wrong thing, like buffer overflow.