bellerofonte / buderus-monitor

Remote monitor for Buderus Logamax 4xxx using Raspberry Pi, Node.js, React.js and Telegram

Buderus Logamax 4xxx monitor

This project is inspired by Peter Holzleitner.

This stuff allows you to monitor your Buderus boiler with Logamatic 4xxx from your smartphone or laptop. Server side runs on a Raspberry Pi, client side runs on any web browser on in a Telegram app.

Unfortunately, Logamatic 4xxx does not have IO port compatible to Raspberry Pi, so you have to assemble a simple connector.

The schematic.png shows how it is supposed to be implemented.

The pins are used on Raspberry Pi:

• +3.3V (pins 1 or 17)
• RXD0 (GPIO15, pin 10)
• Ground (pins 6, 9, 14, 20, 25, 30, 34, or 39)

The BF pins are used on Logamatic 4xxx. Check out your Logamatic 4xxx docs for it's location.

Installing

I mean that Nodejs has been installed and configured already.

First, download release zip archive and extract it's files anywhere on your Raspberry Pi. Then install needed Nodejs modules

npm install

Rename and edit config file

mv sample-config.json config.json
nano config.json

Done!

Configuring

The config.json provides all required settings as a JSON object:

• portName is a device name of Raspberry Pi's serial port
• The web field describes web server configuration
  • allowedIP is an array of allowed IP addresses/masks. Remove it if your do not require IP filtering. More info
  • port number to listen at. Run code with sudo if port 80 specified.
• The telegram field provides config for Telegram bot
  • apikey is obviously your Telergam bot's API key. More info
  • proxy is an address or HTTP/HTTPS proxy server. Use it only if Telegram bots are blocked in your country. This overrides baseApiUrl bot option.
  • phones is an array or allowed Telegram IDs (not phone numbers).
• The db field describes how to save history to SQLite database
  • filename is database file name. Find more info on SQLite's website
  • fields is an array containing fields (i.e. columns) whose will be stored in DB in exactly same order. Acceptable values are: outdoor, water and zone{1..N}.
  • interval is a millisecond period for DB writes. Default is 600000 (10 minutes) i.e. a new row will be written to DB every 10 minutes.

The only required field is portName. Every other field is optional.

The are at least two reasons to configure Telegram bot here:

• World-wide safe remote access to your boiler without VPNs, static IPs, tunnels, port switches, etc.
• Bot will send you a notification immediately if any error occurs.

Running

nodejs index.js

or in case of port 80 (or any other system port)

sudo nodejs index.js

The best idea is to run this code as a Systemd service. Check out the buderus-monitor.service file for a sample configuration.

Accessing from web browser

http://<raspberry_ip>[:<port>]/

or

http://<raspberry_hostname>[:<port>]/

You also can turn this UI to a standalone app on any iOS or Android device. Just use 'Add to main screen' option (or smth like that).

Here is how it should look like on a smartphone

Building from sources

Checkout from Github repository to your PC/Mac and run

npm install
npm run prod

By default, output directory is ./target. You can change it in webpackfile.js