I have an USB keyboard here, and I would like to connect it on bluetooth to other devices (mostly to android phones/phablets/tablets).

Yes, I know that buying a bluetooth keyboard would be more simple and cheap, but not this is what I want to do.

I know that using OTG to connect the USB device to the android directly could also work, and this is a feasible direction, but my this question focus to the other option:

I am looking for a device, where I can plug my USB keyboard into, and my androids would see it as a bluetooth device from that point.

Looking for that on the google/ebay/amazon, the search results are faded away by the reverse direction (connecting a bluetooth device over usb), or by for me irrelevant audio bluetooth transfer solutions. I simply can't find such a device there. (Possibly I did not use the correct search keywords.)

I think such an adapter would require also a battery or/and an external (probably USB) power source.

Price is not very important yet (currently I am only looking for the options), later I will likely buy the cheapest one on the ebay.

  • Any old phone, a USB-OTG cable and this app: play.google.com/store/apps/details?id=io.appground.blek ?
    – towe
    Commented Jul 13, 2020 at 14:01
  • Or a Raspberry Pi: yetanotherpointlesstechblog.blogspot.com/2016/04/…
    – towe
    Commented Jul 13, 2020 at 14:02
  • @towe Thanks, it is a possible direction. But currently I am thinking on an OTG-less solution. Connecting the keyboard with OTG to another phone would not be OTG-less (but possible).
    – peterh
    Commented Jul 20, 2020 at 10:05
  • @towe Using a Raspberry pi for that would be like shooting flies by a cannon.
    – peterh
    Commented Jul 20, 2020 at 10:28
  • Maybe a Teensy on a custom PCB with an HC-05 bluetooth module. My suggestions seem to keep getting more and more DIY though.
    – towe
    Commented Jul 20, 2020 at 11:13


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Browse other questions tagged or ask your own question.