I want to use Serial and BT same time on RPi 4B (Python) I thought I cannot use it so I attached usb blutooth dongle (CSR4.0?) on it. But I only can find references on the net using default BT when I try to find how to use BT function,
I found some hint on another question. (How to use serial and bluetooth at the same time ) but I cannot understand all how-to.
My question is 1) How can I do, if I want to use external BT dongle except from on-board one. (final goal is controlling by python)
2) Could somebody kindly help me to understand previous solution? ( How to use serial and bluetooth at the same time ) especially How to setup the pins... Or at least some article to understand the solution.
Thank you very much in advance.