I just started working on a project involving bluno beetle ble. For now, i'm sending the data from beetle to a android app i made.

But, for a fail safe mechanism in case the mobile is not in range or has disconnected from the device, i want to add a SD card reader to the device so i can save the data.

Is it really possible to add SD card reader to beetle ble? If yes, can someone provide any hint on what connections need to be made?


  • Have you found an answer to this? Jan 23, 2018 at 13:33
  • @RichardWinter check the answer
    – sbk
    Feb 21, 2018 at 16:51

1 Answer 1


Eventually I got it working. The connections that i made are as follows:

  • SDA pin on beetle -> SDA pin on SD card module
  • SCL pin on beetle -> SCL pin on SD card module
  • GND pin on beetle -> GND pin on SD card module
  • VCC pin on beetle -> VIN pin on SD card module

Then upload the sample code present on arduino IDE, or you can find it here as well: https://www.arduino.cc/en/Tutorial/ReadWrite

There we go!

EDIT: The soldering is tricky for bluno beetle. Detailed instructions can be found here :

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