BLE Micro is a Tiny Bluetooth 4.0 Development Board

BLE Micro is a Tiny Bluetooth 4.0 Development Board

DFRobot Bluno is a Bluetooth 4.0 LE development board following Arduino UNO form factor, and powered by TI CC2540 chipset. The board sells for $24.90 on their online store, and the company provides firmware and mobile app source code, but if you ever wanted a similar solution in a much smaller form factor, and powered by a coin cell battery, the company has now launched BLE Micro board.

BLE Micro board specifications:

  • Bluetooth Chip – Texas Instruments CC2540 8051 MCU with USB, Bluetooth 4.0 LE connectivity
  • Wireless Connectivity
    • Frequency: 2.4GHz
    • Transfer rate:  ≤1Mbps
    • Modulation: GFSK, Bluetooth low power, V4.0
    • Sensitivity: -93dB
    • Transmission distance – 30m in free space
  • USB – 1x micro USB port
  • Expansion – 21 through holes with reset, power signals, UART, and GPIOs.
  • Input Voltage: +3.3 DC
  • Power Consumption – Working: 10.6mA average, ready mode:8.7mA
  • Temperature Range – -10 ℃ ~ +65 ℃
  • Dimensions – 49mm x 35mm

You can find more details including schematics, AT command set, links and info for Android and iOS apps in the Wiki.

DFrobot’s BLE Micro board is sold for $19.90 in single quantity and a bit lower in higher quantities, e.g. $17 per unit for 10 pieces or more.

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Mike is the founder and editor of, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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