I’m working on a project that needs to send audio from a control board to a bluetooth headset when a certain event occurs. My initial project used an Arduino Nano as the control board, and when said event occurred, it would make a tone through a wired piezo speaker. I instead wanted the tone to output to a bluetooth headset. So I replaced the Nano with a Bluno (since it has the same pinouts). But since that board uses SPP I had to make my own headset with a second Bluno and the piezo speaker. That works, but I would instead like to use a standard bluetooth headset or earbuds. I understand that the Bluno won’t work for that. I think I need a board that has a Digital Signal Processor (DSP) along with HSP and A2DP bluetooth protocols. I was looking at the RN-52 breakout board and was wondering if that would work in sending some audio file to a pair of bluetooth earbuds? Is there a different board that would perform this function as well? Any advice would be appreciated.
Hi, and thanks for posting in the forums!
The RN-52 is an audio sink device and can only connect to an audio source device like a phone or Bluetooth enabled stereo receiver. Unfortunately we don’t currently carry a Bluetooth module capable of being an audio source, but the dev kit in the link below should work for that. It’s based on the BC127 Bluetooth module and that module can operate in sink or source mode depending on how you have it configured.
Hope this helps, and good luck with your project!](https://www.digikey.com/products/en?mpart=BC127-DISKIT001_6001098&v=1645)
Thanks for the reply. I checked out the link, but I was hoping to have something more portable. Since that is based on the BC127, could I get this: https://www.sparkfun.com/products/12819
Although the breakout seems to be retired.
Actually just saw this board: https://www.sparkfun.com/products/14006
This is the little soundie and can store 20 short audio files. Could I connect a bluetooth jack that outputs to bluetooth headphones? If that works, then I think this will solve my problem.
Something like [this might work for you. The Little Soundie could be your audio source and that should be able to transmit the audio.](Bluetooth Audio Receiver / Transmitter with Detached Cable | Bluetooth)
I just noticed that the little soundie doesn’t work with headphones and that it needs to be plugged into a speaker. Would the bluetooth transmitter still work then?
Without actually trying it, I can’t say for sure, but I suspect it would work.
Alright. I’ll go ahead and get it and test it out. Thanks for your help.
Just as an update, I got the little soundie and a bluetooth transmitter with a 3.5mm jack. I was able to play sounds stored on the little soundie to my bluetooth headset. So it works. However, I was also able to plug in headphones directly into the little soundie even though it says that shouldn’t work. Thanks for your help.