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MCUST2M32F103REY – 32-bits, 64kB RAM
external memory128 Mbits external Nor flash (N25Q128A13E1240F)
power3,7V LiPo battery – 650 mAh (063040)
radio chipsetAT86RF231
a IEEE802.15.4-compliant radio at 2.4 GHz
ledsgreen, red, orange


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The M3 Open Node can reset, debug and program the STM32 on JTAG through the FTDI4232H connected to the USB. This component allows also a UART link to the STM32. The Open Node connector gives access to 3 STM32/GPIO and the STM32/I2C. Two power lines are accessible on this connector:
  • a + 5.0 volts for the board power supply
  • a 3.3 volts for the consumption monitoring of the STM32, the RF component and the sensors

The M3 Open Node can be used standalone without a gateway connected to the M3 Open node connector. The powering of the board is then assumed by a battery or by the USB connector  The choice of the power input is done electronically (power management).

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