I’ve been working with the RN-52 for streaming audio, and i’m aware of the AV+ and AV- commands that increase and decrease volume, but I need to be able to read the volume level on my phone. The AV+/- commands do seem to increase and decrease volume, but the slider on my phone doesn’t move, and the volume up/down buttons on my phone also increase/decrease volume but I can’t seem to read this value from the RN-52.
I want to be able to display the volume level on a strip of LEDs, such that when I turn my volume knob, or turn it up on my phone, the changes are reflected in the same way (on the same scale), but since I can’t read or change the volume level on my phone i’m not sure if this is possible with this module.
I’d really appreciate any input, especially if anyone knows of a way to do this.
I couldn’t find confirmation in the datasheet or programming manual for the module, however, it is my assumption that the volume is specifically increased only in the module. There’s most likely not a feedback to your phone for the audio setting of the module itself. This kind of thing happens with my BLE car stereo and my phone. I can crank my phones audio to 100% and still control volume going to my actual speakers from the car stereo. Most likely, you’ll have to have a voltage or current reading circuit attached to the speakers to read what’s actually going on in those lines.
Thanks, Brandon
I just wanted to make sure I wasn’t missing anything in the documentation.
I’m pretty sure it’s possible to achieve what I’m thinking of, since I have a bose bluetooth speaker (soundlink 2) that can change the volume of my phone, but I’ll have to look into the specifics of AVRCP, A2DP, HFP protocols to make sure. Then I suppose I will try to implement these features on a different bluetooth chip.
Thanks again for your help!
Charlie