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. [1122]

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.

[11] It seems that I can use the burning port through the lead wire

[image] ren_yucheng: download programs? I 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/

Confirmed working: flashing AMB82-mini via external USB-UART adapter (CH340G) connected to pins 25/26. Adapter used: 5 Pcs UART-TTL USB Adapter with CH340G Chip, Make sure to use 3.3V mode Connections: CH340G TX → AMB82-mini pin 26 (LOG_RX / PF3) CH340G RX → AMB82-mini pin 25 (LOG_TX / PF4) CH3…

How to use an external CH340 USB to serial port board to download programs?

Hardware

M-ichae-l July 29, 2026, 3:40am 7

There is a auto download design for the board.
https://forum.amebaiot.com/t/sharing-ameba-family-is-now-supporting-auto-upload-features/795
You may want to refer to hardware and software design.

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How to use an external CH340 USB to serial port board to download programs?

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