Overview
A custom component for ESPHome for reading meter data sent by the Kaifa MA309M via M-Bus.
Features
- Exposes all data sent from the smart meter as sensors
- Allows grouping data together in a single report for storing in InfluxDB or similar
Supported meters
Supported providers
Exposed sensors
- Voltage L1
- Voltage L2
- Voltage L3
- Amperage L1
- Amperage L2
- Amperage L3
- Active Power Plus
- Active Power Minus
- Active Energy Plus
- Active Energy Minus
- Reactive Energy Plus
- Reactive Energy Minus
Requirements
Notes
- Tested with ESP32-POE (should work without problems over wifi)
Software installation
This software installation guide assumes some familiarity with ESPHome.
- Clone this repository into your ESPHome config files:
git clone git@github.com:DomiStyle/esphome-dlms-meter.git
- Copy the meter01.example.yaml into your ESPHome config folder and adjust it to your needs
- Don't forget to add your decryption key in meter01.yaml
- Connect your ESP
- Run
esphome meter01.yaml run
and choose your serial port (or do this via the Home Assistant UI)
- Disconnect the ESP and continue with hardware installation
Make sure your directory structure looks like this:
- config
- meter01.yaml
- esphome-dlms-meter
- The files from this repo (espdm.h, ...)
Hardware installation
- Cut one end of the RJ11 cable and connect wires to pin 3 & 4 OR Plug RJ11 into a breakout board
- Connect everything according to this table:
ESP32 |
M-Bus Board |
RJ11 |
Notes |
3.3V |
3V3 |
- |
3.3V power |
GND |
GND |
- |
Ground |
GPIO4 |
RX |
- |
Connect RX from the M-Bus board to TX from the ESP |
GPIO36 |
TX |
- |
Connect TX from the M-Bus board to RX from the ESP |
- |
MBUS1 |
3 |
Connect M-Bus board to smart meter, polarity does not matter |
- |
MBUS2 |
4 |
Connect M-Bus board to smart meter, polarity does not matter |