mbed HRM1017

The Switch Science mbed HRM1017 is FCC and Japan radio type approved Bluetooth low energy development board with the Nordic's nRF51822 SoC. This board is also compatible with nRF51822-mKIT except the 32.768kHz crystal availability.



  • Nordic nRF51822 System-on-Chip combining Bluetooth v4.1-compliant 2.4GHz multiprotocol radio and ARM Cortex-M0 processor on a single chip optimized for ultra-low power operation
  • Flash 256kB, RAM 16kB
  • 2.54mm (0.1inch) pitch, bread board friendly 29 GPIOs
    Be careful! GPIO port can drive up to 0.5mA!
  • USB drag and drop flashing
  • USB Virtual COM port for serial terminal
  • CMSIS-DAP interface for programming and debugging from offline tools
  • Accepts power through:
    • Micro-B
    • Pin header (1.8V-3.6V Typ. 3.0V)


We releaseed switch science mbed HRM1017r3. This product is the updated version of mbed HRM1017. The 3 major changes are below.

  • The revision of [nRF51822] chip on HR1017 (2 to 3)
  • Expanded the long side of board to antenna length.
  • Altered silk.



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