esp32-smartmeter

A program for obtaining readings from an Iskra MT174 with a serial reading head from Volkszähler.

Required Hardware

- ESP32
- Iskra MT174
- Serial reading head from Volkszähler

Serial Reading Head from Volkszähler

Please note, the instructions are in German:

https://wiki.volkszaehler.org/hardware/controllers/ir-schreib-lesekopf

Home Assistant Configuration

You will be required to create an access token for Home Assistant.

https://www.home-assistant.io/docs/authentication/

Installation

Relying on Thony would be my preferred choice for programming the ESP32.

https://thonny.org/

To-Do

- Incorporate a web server for data reading and configuration.
- Test the code on other power meters.
- Integrate a MQTT client.

Debugging

If you encounter errors, try modifying the end-of-line definition in the code on lines 112/113:

if b'53.5*255' in line or b'1.8.4*15' in line:
    break

(Note: The IR-LED on my first reading head was faulty so it required a replacement.)

License

MIT