We have the TX/RX Gpio already being used on the Raspberry Pi 3B+ . I believe the onboard Bluetooth uses the same ? How can I get bluetooth working when our TX/RX is already being used.

Right now I've tried a lot of things.. bluetoothctl returns most often "no control device found" ..



Unless you have fiddled with it, Bluetooth uses /dev/ttyAMA0 and the serial port /dev/ttyS0. These are different devices.

You should use /dev/serial0 for serial rather than the physical port.

See How do I make serial work on the Raspberry Pi3 , Pi3B+, PiZeroW


Maybe there is a way of alternatively speak with one device and then the other.

I think managing the UART in the way that you configure it on the the go to speak with the bluetooh then the PINs is possible. Some sort of script to make the switch in the OS may be needed…

But you will not be able to speak to both devices at the same time, thus i believe one of the Raspberry's UART (the mini) is difficult to use (speed varying, etc).

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