Bluetooth for promini 3.3V


Which bluetooth module can be preferred for arduino promini 3.3V?

(Can the bluetooth LE work when powered with 3.3V)



All blueteeth are 3.3v devices. I think your practical choices are twofold.

  1. I have seen an HC-05 on a breakout board specifically for 3.3v operations, i.e. no on-board level shifting.

  2. I guess a sensible way of using the Pro Mini is to mount it on a PC board, and that same board can be designed to also accommodate a bare bluetooth module, HC-05 or HM-10.

Hello ,

I got a Adafruit Bluefruit LE UART Friend - Bluetooth Low Energy (BLE) : ID 2479 : $17.50 : Adafruit Industries, Unique & fun DIY electronics and kits UART to communicate with arduino promini 3.3 V

I have a sensor wired to the promini which communicates through I2C protocol.
Is it possible to send the pressure data via the above module to the computer.

Thank you!

That is my understanding but i have never actually use mine. The Pro Mini is just like a Uno, and works the same way, except that the USB hardware is missing.