How to use an external CH340 USB to serial port board to download programs? In the later stages of the project, I do not want to use the micro USB interface to download the program, which is not convenient for debugging when integrated into some shells.
At least I wonder if there is a way to connect the micro USB through a cable? If possible, please also let me know the wiring schematic of the micro USB part. Thank you. I’m not sure if anyone has tried this tutorial before, as I haven’t seen a beginner friendly tutorial yet.
you can use the 25, 26 pin to connect with ch340 tx, rx for the download.
https://www.amebaiot.com/en/amebapro2-amb82-mini-arduino-getting-started/
thank you,i will try