This project implements a proof of concept on how to read out data from the Buderus KM100 internet gateway of different heating systems and log them to influxdb.
- Install micropython on your device.
- Copy config.py.sample to config.py and edit your settings
- Use the internet to find out how to put the right AES key for your device
- configure the IP of the KM100 and the host & credentials to your influxdb
- It uses
urequestsandtracebackfrom micropython-lib, as I was too stupid to figure out how to use the bundled libraries, I added them to the working directory.
I run this on a ATH79 OpenWRT device (WDR3600) which works fine, as long as I restart the python script every few hours.
There seems to be a memory leak which is not visible in python stack, e.g. I suspect it in the ssl or socket bindings.
That is why there is run.sh which runs the micropython script run.py in an endless loop; The python script exits itself after a hundred so points
have been captured. See the script for details.
Feel free to instal the log_buderus procd init script on your device.
I used various PHP implementations to first implement this in lua 4 years ago: https://github.com/NerdyProjects/BuderusWebGatewayLua With the updated OpenWRT, the required packages did not fit anymore onto the WDR3600 (well, yes, it might get replaced at some point as well :D) Micropython and the required libraries use well less space, so now it works again.