[BPI-R2 Pro] Mic-Switch


it looks like r2pro misses MIC-connection in headphone-jack…but it does not make sense to use a 4-pin-jack instead of a 3pin

mic seems to connected only to on-board-mic, can someone from bpi configm, that mic on headphone cannot work? can this be changed to drop on-board-mic and connect it to the 4pin-jack?

Inspecting the board shows the TRRRS jack is of surface-mount form factor. Any way for users to solder a jumper wire from the jack to the microphone.