When making a custom board where am I supposed to see which upload_protocol I can choose?

1

upload_protocol is listed per board but is implemented per platform.

I was having an issue where “upload_protocol = esptool” regularly failed at the end of the upload when switching from framework “arduino” to “espidf, arduino”. But uploading during debugging worked so I wanted to try that. I eventually found out that “upload_protocol = esp-builtin” was a valid option by looking at the platform source code. I didn’t find it when looking at some boards using the framework, but I have later seen that it is listed for some.

2

https://docs.platformio.org/en/latest/boards/espressif32/esp32dev.html#uploading

https://docs.platformio.org/en/latest/boards/espressif32/esp32-c3-devkitc-02.html#uploading

3

Those are two boards, I don’t understand what you mean.

4

My point is, every officially support board is listed in https://docs.platformio.org/en/latest/boards/index.html#espressif-32. Clicking on a board reveals the list of allowed values for upload_protocol as a bullet point list.

The avialable upload protocols are automatically calculated based on the chip type per

5

So the answer to “When making a custom board where am I supposed to see which upload_protocol I can choose?” is “look at the source code for the platform”?

6

Again, they are also listed in the doc links I’ve sent above. You should be able to use all upload_protocol values from a different official board that has the same type of ESP32 module.

grafik

7

Oh it looks all(?) the boards that have the S3 module does list all(?) protocols.

But would a different official board, in general, list all upload_protocol values that apply to the same type of ESP32 module. Ex a board without JTAG-pins (for whatever reason) probably wouldn’t list esp-prog, even though the module can be programmed using esp-prog.