ModbusLogMQTT

Energy Meter Logger

Log your Energy Meter data on a Raspberry Pi and plot graphs of your energy consumption. Its been verified to work with a Raspberry Pi with a Linksprite RS485 shield and reading values from WEBIQ131D / SDM120 and WEBIQ343L / SDM630. By changing the meters.yml file and making a corresponding [model].yml file it should be possible to use other modbus enabled models.

Requirements

Hardware

• Raspberry Pi 3
• Linksprite RS485 Shield V3 for RPi
• Modbus based Energy Meter, e.g WEBIQ 131D / Eastron SDM120 or WEBIQ 343L / Eastron SMD630

Software

• Rasbian
• Python 2.7 and PIP
• Minimalmodbus
• InfluxDB
• Grafana

Prerequisite

This project has been documented at Hackster. Please follow the instructions there for more detailed information.

Installation

Install InfluxDB*

Step-by-step instructions

• Add the InfluxData repository

  $ curl -sL https://repos.influxdata.com/influxdb.key | sudo apt-key add -
  $ source /etc/os-release
  $ test $VERSION_ID = "9" && echo "deb https://repos.influxdata.com/debian stretch stable" | sudo tee /etc/apt/sources.list.d/influxdb.list
  

• Download and install

  $ sudo apt-get update && sudo apt-get install influxdb
  

• Start the influxdb service

  $ sudo service influxdb start
  

• Create the database

  $ influx
  CREATE DATABASE db_meters
  exit

  

  *source

Install Grafana*

Step-by-step instructions

• Add APT Repository

  $ echo "deb https://dl.bintray.com/fg2it/deb-rpi-1b jessie main" | sudo tee -a /etc/apt/sources.list.d/grafana.list
  

• Add Bintray key

  $ curl https://bintray.com/user/downloadSubjectPublicKey?username=bintray | sudo apt-key add -
  

• Now install

  $ sudo apt-get update && sudo apt-get install grafana

  

• Start the service using systemd:

  $ sudo systemctl daemon-reload
  $ sudo systemctl start grafana-server
  $ systemctl status grafana-server
  

• Enable the systemd service so that Grafana starts at boot.

  $ sudo systemctl enable grafana-server.service
  

• Go to http://localhost:3000 and login using admin / admin (remember to change password) *source

Install Energy Meter Logger:

• Download and install from Github

  $ git clone https://github.com/samuelphy/energy-meter-logger
  

• Run setup script (must be executed as root (sudo) if the application needs to be started from rc.local, see below)

  $ cd energy-meter-logger
  $ sudo python setup.py install
  

• Make script file executable

  $ chmod 777 read_energy_meter.py
  

• Edit meters.yml to match your configuration

• Test the configuration by running:

  ./read_energy_meter.py
  ./read_energy_meter.py --help # Shows you all available parameters
  

• To run the python script at system startup. Add to following lines to the end of /etc/rc.local but before exit:

  # Start Energy Meter Logger
  /home/pi/energy-meter-logger/read_energy_meter.py --interval 60 > /var/log/energy_meter.log &
  

  Log with potential errors are found in /var/log/energy_meter.log