![]() My setup is not very clean since I've not designed yet a PCB for it, my doubt is if this can be cleaned up with a decent PCB design and ground separation between digital and analog part, or if this is a problem with this type of module and impossible to be solved. Until a device is paired with the bluetooth module there is no noise in the module output, but after pairing there is some noise, not very loud but it can be listened when the music is more silent. One issue is some noise appearing when I pair a device with the module. I've been using the KRC-86B V3.3 Bluetooth module (Bluecore 5 based) in a wireless speaker and have some issues, since there are some other posts referring this module perhaps someone has already faced them and found some solution.
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