Docker Hub: gtricot/lechacal-mqtt:latest
This project is a simple lightweight docker container, designed to read data from the LeChacal Energy Monitoring PCB's and then transmit data to a Home Assistant server (via MQTT) as part of a wider energy monitoring solution...
The program ** should ** support all LeChacal devices that communicate via Serial, however at the time of writing I only have a RPICT7V1_v3.0 to test it on.
Lastly, the use of a CT Clamp's to monitor energy consumption on your individual circuits, is a great addition to a fully featured smart home, and the Voltronic HA Solar Monitor (if you are running this also).
The program is designed to be run in a Docker Container, and can be deployed on a Raspberry PI, inside your breaker box, using a DIN rail mount such as the Modulbox, from Italtronic.
- RPICT3V1 - 3 CT 1 Voltage.
- RPICT3T1 - 3 CT 1 Temperature
- RPICT4V3_v2.0 - 4 CT 3 AC Voltage.
- RPICT7V1_v2.0 - 7 CT 1 AC Voltage.
- RPICT8 - 8 CT
Note, if your device is not listed here you can create a json mapping file - Please look at the examples in the src/device-mapping directory.
You may need to configure your Raspberry PI's /boot/config.txt file like so:
[all]
enable_uart=1
uart_enable=yes
And disable the Serial Console output using the raspi-config tool.
Run the official Docker image (amd64, armv6, armv7, arm64).
docker run -d --name lechacal-mqtt \
--device=/dev/ttyAMA0:/dev/ttyAMA0 \ # add serial port device from host
- e MQTT_URL=mqtt://my_mqtt_broker:1883 \ # set mqtt broker url
gtricot/lechacal-mqtt
Configuration uses environment variables.
| Env var | Description | Default value |
|---|---|---|
| LOG_LEVEL | Log level (INFO, DEBUG, ERROR) | INFO |
| SERIAL | Serial Port location | /dev/ttyAMA0 |
| BAUD_RATE | Serial Port Baud Rate | 38400 |
| DEVICE_MAPPING | Lechacal Device mapping file | RPICT7V1.json |
| FRACTION_DIGITS | Fraction digits used when rounding sensor values | 2 |
| INVERT_NEGATIVE_VALUES | If true, negative values are inverted (no clamp invert needed) | false |
| SENSOR_VALUE_THRESHOLD | Sensor values inferior to threshold are set to 0 (noise reduction) | 0 |
| MQTT_URL | MQTT Broker connection URL | mqtt://localhost:1883 |
| MQTT_USER | MQTT user (optional) | |
| MQTT_PASSWORD | MQTT password (optional) | |
| IDENTIFIER | Identifier for Home-Assistant Discovery | lechacal |
| DISCOVERY_PREFIX | Topic prefix for Home-Assistant Discovery | homeassistant |
Note:
- builds on docker hub are currently for
linux/arm/v6,linux/arm/v7,linux/arm64/v8,linux/amd64-- If you have issues standing up the image on your Linux distribution (i.e. An old Pi/ARM device) you may need to manually build the image to support your local device architecture - This can be done by uncommenting the build flag in your docker-compose.yml file.
Providing you have setup MQTT with Home Assistant, the device will automatically register in your Home Assistant when the container starts for the first time -- You do not need to manually define any sensors.
From here you can setup Graphs and regular text value sensors to display sensor data.