Kaifa MA309 Smart Meter Logger

Overview

This script was made to read out the new Smart Meter "Kaifa MA309" used by Austrian power grid operators, here tested with TINETZ, EVN and VKW.

Specification of the interface: https://www.tinetz.at/fileadmin/user_upload/Kundenservice/pdf/Beschreibung_Kundenschnittstelle_Smart_Meter_TINETZ.pdf

Discussion about this script: https://www.photovoltaikforum.com/thread/157476-stromz%C3%A4hler-kaifa-ma309-welches-mbus-usb-kabel/?pageNo=2#post2350873

Useful description of TiNetz frames: https://www.gurux.fi/node/18232

This script was only tested with the above meter and the mentioned suppliers.

Required Hardware

1. RJ12 6P6C Plug

   e.g. https://www.amazon.de/6P6C-Stecker-6-polige-Schraubklemmen-Adapterstecker-CCTV-Adapterstecker/dp/B07KFGS3BF
   
   Note: you have to cut off the plastic shell of the RJ12 plug to fit it into the socket of the MA309.
   
   

2. MBUS Slave module like this:

   https://www.amazon.de/JOYKK-USB-zu-MBUS-Slave-Modul-Master-Slave-Kommunikation-Debugging-Bus%C3%BCberwachung/dp/B07PDH2ZBV

Config

Create a file meter.json to configure your serial connection parameters and your AES key.

A template file meter_template.json can be recycled for this.

{
  "loglevel": "logging.INFO",
  "logfile": "/var/log/kaifareader/kaifa.log",
  "port": "/dev/ttyUSB0",
  "baudrate": 2400,
  "parity": "serial.PARITY_NONE",
  "stopbits": "serial.STOPBITS_ONE",
  "bytesize": "serial.EIGHTBITS",
  "key_hex_string": "",
  "interval": 1,
  "supplier": "VKW",
  "export_format": "SOLARVIEW",
  "export_file_abspath": "/var/run/kaifareader/kaifa.txt",
  "export_mqtt_server": "mymqtt.examplebroker.com",
  "export_mqtt_port": 1883,
  "export_mqtt_user": "mymqttuser",
  "export_mqtt_password": "supersecretmqttpass",
  "export_mqtt_basetopic": "kaifareader",
  "wanted_values": [
    "VoltageL1",
    "VoltageL2",
    "VoltageL3",
    "CurrentL1",
    "CurrentL2",
    "CurrentL3",
    "RealPowerIn",
    "RealPowerOut",
    "RealEnergyIn",
    "RealEnergyOut",
    "ReactiveEnergyIn",
    "ReactiveEnergyOut",
    "Factor"
  ]
}

The AES key format is "hex string", e.g. a4f2d...

Please provide your electricity supplier by the field "supplier". Because each supplier uses its own security standard, the telegrams differ. This script was tested with suppliers:

• TINETZ
• EVN
• VKW

Make sure to only select the values you need from the list in wanted_values by deleting the elements you don't want. The logfile will show the related OBIS-Values when run in logging.INFO.

interval must be <5 seconds, 1 second is recommended tho.

Export

Solarview

Currently, the export to a file readable by Solarview (http://solarview.info/) is supported.

• The config key export_format has to be set to SOLARVIEW
• The config key export_file_abspath has to be set to the absolute file path

MQTT

• The config key export_format has to be set to MQTT
• The config keys export_mqtt_server, export_mqtt_port, export_mqtt_user, export_mqtt_password and export_mqtt_basetopic have to be set.

Installation

Systemd automatic service

This installs and automatically starts a systemd service.

Install the debian package

sudo dpkg -i kaifareader_...deb

If there are problems on missing packages, execute afterwards:

sudo apt -f install

Start

Automatically, if service is installed and running

Startup done, automatically.

Status of the service:

sudo systemctl status kaifareader

Start manually (e.g. after manually stopped)

sudo systemctl start kaifareader

Manually

Foreground

python3 kaifa.py

Background

nohup python3 kaifa.py &

Stop

If service is installed and running

sudo systemctl stop kaifareader

Foreground

Press CTRL+C

Background

Possible by killing the process