Descibes the serial interface of pellet stoves based on the Duepi Evo line. It is known to be working with the "Wamsler Quattro 6" pelletstove.
This code and information comes "as is" without any guarantee for function, functional safety or completeness. Use is entirely at your own risk. Incorrect operation could kill you, others and your cat.
This code was reverse-engineeres by @aceindy and me. We replicated the data passed through between the serial interface of the "WiFi Module" and the stove. The stove uses a simple code with a baudrate of 115200, 8N1. If you have access to a "WiFi Module", you can listen to it on your own, when you attach an Arduino or an ftdi-chip to the correspondenting lines at the stove as "man in the middle". The protocol is unencrypted but minimally obfuscated. This project started as a security-project, as the original Stove-app did not satisfied my personal security demands.
You will need to connect to the serial interface on the Duepi Mainboard. Mostly the interface is accessible on the back of the stove by a 4-pin connector. In my case it was a "ATX 4-Pin CPU Connector".
The serial interface is 5 V TTL. So you might just connect a TTL FTDI to USB adapter to this and your PC. If you want to connect a ESP or Arduino you have to remember, that some devices like the ESP-01s only support 3.3 V logic, so you might use a logic level shifter.
Use a baudrate of 115200, 8N1
For all my examples I use a ESP-01s in the WiFi with a telnet-server, so I can remotely communicate with my stove.
The install script is supposed to be used with Debian / Ubuntu based systems, but the bash scripts can run on any system that can install the dependencies (expect and telent).
To install just run:
curl -s https://git.io/JYfPd | bash -s --Just run ./sendData.sh [command] as shown in the example:
./sendData.sh RD90005FThis will return the status code in the console. To write the status to a file type:
./sendData.sh RD90005F > status.txtWarning! the status code in the commandline is not fully visible, but stdio forwards it correctly including all steering codes. Commandline only shows "2010023&" of full return "^[02010023&"!!!
A full list of known commands and responses is located in commands.txt.
Install apache2 + php . Then download the files in examples/php . Open a webbrowser an navigate to the webservers ip. Now you can steer the pelletstove via webinterface.
