AMS <-> MQTT Bridge

• Electrical design

Background

The purpose of this project is to collect information and build a simplified bridge for reading serial DLSM/M-bus information from electrical power meters (AMS), provided over the HAN port, and publishing to some IoT friendly target.

Components will be ESP8622, Arduino code, a (very simplified) M-bus <-> 3.3V serial interface

As a start, we should try to get information from the three types of AMS meters currently being installed in Norway. Some details about these are available here: NVE_Info_kunder_HANgrensesnitt.pdf

The project should include:

• Simple circuit to transform MBus levels to 3.3V serial
• Code to capture and analyze data from PC
• Code to capture and analyze data from Arduino
• Sample data from various meters
• Documentation on HAN / MBus / DLMS/COSEM
• Code to parse DLMS data into a structure
• Real schematics, including ESP8266
• PCB layout
• Arduino library
• Arduino sample sketch to read values and report to MQTT server

Circuit to read HAN from PC (via FTDI)

Circuit prototype

MQTT output