Serial monitor cannot read ROM boot messages on ESP32-C2 (26 MHz crystal) – needs 74880 baud

[ewpa]

Confirming this project works with ESP32-C2, ESP8684, showing the correct chip and flash details. You may want to update the README to show this chip as tested.

Requesting an enhancement to add new BAUD rate of 74880 so that the serial output from the bootloader is readable when using 26 MHz crystal on C2. Perhaps restrict this BAUD rate to C2 to reduce clutter. Open to comment.

[thelastoutpostworkshop]

Thanks for taking the time to report this.

[thelastoutpostworkshop]

is this baud rate only for the serial monitor ?

[ewpa]

Yes, just the serial monitor. For context, initial boot messages appear at 26/40*115200 (74880) BAUD when using a 26 MHz crystal rather than 40 MHz.

[thelastoutpostworkshop]

Thanks

[Laosepy]

This issue can be resolved by modifying the default baud rate in the firmware through the idf.py menuconfig option.

[ewpa]

I do set CONFIG_XTAL_FREQ_26 and this fixes the BAUD, but only after the ROM bootloader.

[thelastoutpostworkshop]

I am not sure if it's fixed for you @ewpa ?