M-Bus FeatherWing

With this FeatherWing you can expand the well-known Feather microcontroller boards from Adafruit, Sparkfun etc. with functions for smart metering.

Feather boards are available from different manufacturers and for different platforms:

•    RP2040
•     ESP32
•     ESP8266
•     Cortex M0
•     Cortex M4
•     SAMD51
•     STM32
•     nRF52840
•     and many more.

The M-BUS Master Wing can read consumption meters for heat, gas, oil, water etc. that have a built-in M-BUS slave interface.

Features:

• M-Bus (meter bus) Master
• powered by an external 9..30V DC voltage (36V for the MBUS will be generated internally from this voltage)
• up to 6 unit loads can be powered
• isolated interface
• can be combined with any Feather shaped microcontroller board

Software:

Arduino IDE

We are providing code of  a simple data repeater to analyse M-BUS data via a connected PC and also a basic M-BUS master to readout M-BUS slaves directly with the Feather microcontroller board.

The M-BUS slave FeatherWing can be plugged onto a Feather microcontroller board to read consumption meters with a so-called P1 customer interface (e.g. electricity meters in Austria). You can also use the FeatherWing to create your own meters for the M-BUS (e.g. to provide self-recorded data for an M-BUS master).

Features:

• M-Bus Slave Node
• based on the TSS721 M-Bus Transceiver IC from Texas Instruments
• isolated Interface
• can be combined with any Feather microcontroller board

Software:

Arduino IDE

On our GITHUB account we have provided example code for reading consumption meters with P1 customer interface and DLMS/COSAM protocol

The Arduino M-BUS meter example shows how you can program your own simple meters.