Bluetooth to fm transmitter

Projects General Guidance
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This project is to create a bluetooth to fm transmitter music streamer. I originally started it in 2018, when I still owned a vehicle that did not have bluetooth. Got prototype version working, then promptly bought a new vehicle with bluetooth. Since then, bought an rv which has a stereo with dodgy bluetooth connectivity so restarted project.

Next Steps
Add ui buttons to replace hardware vol up/dn, prev, play/pause, next buttons. I plan on using the
RN52 Arduino Library.

So first questions:

  • this means a logic level converter (RN52 is 3.3 v logic)
  • using one of the serial1/2/3 rx/tx pins on the Mega to the RN52 UART_TX & UART_RX
  • pulling GPIO09 on the RN52 low
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