Arduino Nano Matter

Overview

The Nano Matter merges the well-known Arduino way of making complex technology more accessible with the powerful MGM240S from Silicon Labs, to bring Matter closer to the maker world, in one of the smallest form factors in the market.

It enables 802.15.4 (Thread®) and Bluetooth® Low Energy connectivity, to interact with Matter-compatible devices with a user-friendly software layer ready for quick prototyping.

The Nano Matter features a compact and efficient architecture powered by the MGM240S (32-bit Arm® Cortex®-M33) from Silicon Labs, a high-performance wireless module optimized for the needs of battery and line-powered IoT devices for 2.4 GHz mesh networks.

Hardware

  • MGM240SD22VNA2 Mighty Gecko SiP

  • CPU core: ARM Cortex®-M33 with FPU

  • Flash memory: 1536 kB

  • RAM: 256 kB

  • Transmit power: up to +20 dBm

  • Operation frequency: 2.4 GHz

  • Crystals for LFXO (32.768 kHz) and HFXO (39 MHz).

  • User RGB LED

  • User button

For more information about the EFR32MG24 SoC and the Arduino Nano Matter, refer to these documents:

Supported Features

The arduino_nano_matter board supports the hardware features listed below.

on-chip / on-board
Feature integrated in the SoC / present on the board.
2 / 2
Number of instances that are enabled / disabled.
Click on the label to see the first instance of this feature in the board/SoC DTS files.
vnd,foo
Compatible string for the Devicetree binding matching the feature.
Click on the link to view the binding documentation.

Connections and IOs

In the following table, the column Name contains Pin names. For example, PA2 means Pin number 2 on PORTA, as used in the board’s datasheets and manuals.

Name

Function

Usage

PC1

GPIO

LED0

PC2

GPIO

LED1

PC3

GPIO

LED2

PA0

GPIO

Button

PC4

USART0_TX

UART Console TX

PC5

USART0_RX

UART Console RX

System Clock

The MGM240S SiP is configured to run at 78 MHz using DPLL and the 39 MHz internal oscillator.

Serial Port

The MGM240S SiP has one USART and two EUSARTs. USART0 is connected to the board controller and is used for the console.

Programming and Debugging

The Arduino Nano Matter contains an SAMD11 with CMSIS-DAP, allowing flashing, debugging, logging, etc. over the USB port. Doing so requires a version of OpenOCD that includes support for the flash on the MG24 MCU. Until those changes are included in stock OpenOCD, the version bundled with Arduino can be used, or can be installed from the OpenOCD Arduino Fork. When flashing, debugging, etc. you may need to include --openocd=/usr/local/bin/openocd --openocd-search=/usr/local/share/openocd/scripts/ options to the command.

Flashing

Connect the Arduino Nano Matter board to your host computer using the USB port. A USB CDC ACM serial port should appear on the host, that can be used to view logs from the flashed application.

Here is an example for the Hello World application.

# From the root of the zephyr repository
west build -b arduino_nano_matter samples/hello_world
west flash

Open a serial terminal (minicom, putty, etc.) connecting to the UCB CDC ACM serial port.

Reset the board and you should see the following message in the terminal:

Hello World! arduino_nano_matter