UtilitechAS.amsreader-firmware/Electrical

Overview

Here are links to the different board designs together with a short summary.

HAN_ESP_Simple (Was: Board 1)

The project's original board design. It

• is based on the ESP8266 chip.
• is powered by USB.
• uses a very simple voltage divider to demodulate the M-bus signal.
• has shematic and pcb design only available as finished pdf/png files.

Status

Prototypes have been made and some people have started using them(?).

HAN_TTL_TSS721 (Was: Board 2)

This board design is a newer alternative to the original. It

• is an Arduino shield.
• uses the industry standard TSS721 chip to interface the M-bus.
• is optically isolated.
• has shematic and pcb design available in editable KiCad source files.

Status

Unfinished, just started.

MBUS_Simulator (Was: Board 3)

This board is a M-bus master simulator to be able to develop and test the other boards without being dependent on having and using a real AMS unit.

Status

Implementation done.

Please also see Getting started building or modifying