IoT consortium adopts M2 format for IoT sensor nodes

Advantech, ARM, Bosch Sensortec, Sensirion, and Texas Instruments are to co-operate on a physically interchangeable standard for wireless IoT sensor nodes and have started an industry body.

M2.COM on sensor motherboard

Based on the 22x30mm M.2 (also known as NGFF – next-generation form-factor) physical shape, developed for computer expansion boards, it is to be know as M2.COM and will combine wireless technology, a microcontroller and networking capability. The industry body will share the M2.COM name.

“One of the key challenges hindering a fast growth of sensor-enabled devices in IoT relevant markets is the lack of widely adopted open -platform” said Bosch v-p marketing Jeanne Forget. “For Bosch Sensortec, it’s therefore essential to actively participate in developing open platforms like the M2.COM. We believe that through the collaboration of these partners the M2.COM open platform will become a driver for sensors in IoT markets.”

M2.COM form factorThe idea is that companies will be able to develop their own sensor boards, into which the small M2.COM board is plugged to provide intelligence and radio links.

“You no longer need to put everything into one sensor but can develop M2.COM and your sensor carrier board separately,” said M2.COM. “Now the sensor maker can choose different M2.COM modules to transmit data by different methods, and the module maker can develop another M2.COM module that supports many sensors.”

M2.COM block diagThe M2.COM edge connector is the standard type 2230 M.2 form factor 75 position interface and includes USB, PWM, SDIO, I²C, I²S, UART, GPIO, SPI, and ADC.

M2.COM block diag

“It’s very simple to connect various sensors to M2.COM by utilizing the rich I/O interfaces powered by the built-in MCU,” said M2.COM.


Signal Purpose
USB Interface for extending storage
PWM Motor control and power supply control
SDIO Interface for extending storage through SD/MMC
I²C Interface for sensors eg: pressure, temperature, moisture, light
I²S Supports audio codecs for broadcasting, audio playback through external speakers
UART Protocol for device control eg: motors, electrical control units.
GPIO I/O control eg: indicator lights, alarms, buzzers
SPI LCM support to display
ADC Using GPIO pins. For analogue sensors.


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