Using an inexpensive rtl-sdr dongle, it's possible to listen for signals from ERT compatible smart meters using rtlamr. This script runs as a daemon, launches rtl_tcp and rtlamr, and parses the output from rtlamr. If this matches your meter, it will push the data into MQTT for consumption by Home Assistant, OpenHAB, or custom scripts.

TODO: Video for Home Assistant

If you use Docker and would rather launch this under a container see <README.Docker.md>.

Tested under Raspbian GNU/Linux 9.3 (stretch)

Install RTL-SDR package

sudo apt-get install rtl-sdr

Set permissions on rtl-sdr device

/etc/udev/rules.d/rtl-sdr.rules

SUBSYSTEMS=="usb", ATTRS{idVendor}=="0bda", ATTRS{idProduct}=="2838", MODE:="0666"

Prevent tv tuner drivers from using rtl-sdr device

/etc/modprobe.d/rtl-sdr.conf

blacklist dvb_usb_rtl28xxu

sudo apt-get install git

Install pip for python 3

sudo apt-get install python3-pip

Install paho-mqtt package for python3

sudo pip3 install paho-mqtt

Install Go programming language & set gopath

sudo apt-get install golang

https://github.com/golang/go/wiki/SettingGOPATH

If only running go to get rtlamr, just set environment temporarily with the following command

export GOPATH=$HOME/go

Install rtlamr https://github.com/bemasher/rtlamr

go get github.com/bemasher/rtlamr

To make things convenient, I'm copying rtlamr to /usr/local/bin

sudo cp ~/go/bin/rtlamr /usr/local/bin/rtlamr

Clone repo into opt

cd /opt

sudo git clone https://github.com/ragingcomputer/amridm2mqtt.git

Copy template to settings.py

cd /opt/amridm2mqtt

sudo cp settings_template.py settings.py

Edit file and replace with appropriate values for your configuration

sudo nano /opt/amridm2mqtt/settings.py

Copy armidm2mqtt service configuration into systemd config

sudo cp /opt/amridm2mqtt/amridm2mqtt.systemd.service /etc/systemd/system/amridm2mqtt.service

Refresh systemd configuration

sudo systemctl daemon-reload

Start amridm2mqtt service

sudo service amridm2mqtt start

Set amridm2mqtt to run on startup

sudo systemctl enable amridm2mqtt.service

To use these values in Home Assistant,

sensor:
  - platform: mqtt
    state_topic: "readings/12345678/meter_reading"
    name: "Power Meter"
    unit_of_measurement: kWh

  - platform: mqtt
    state_topic: "readings/12345678/meter_rate"
    name: "Power Meter Avg Usage 5 mins"
    unit_of_measurement: W

Assuming you're using mosquitto as the server, and your meter's id is 12345678, you can watch for events using the command:

mosquitto_sub -t "readings/12345678/meter_reading"

Or if you've password protected mosquitto

mosquitto_sub -t "readings/12345678/meter_reading" -u <user_name> -P <password>