Help with ESP-C3 and ESP-PROG

Started by Yasen6275, November 12, 2022, 01:13:10 PM

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I messed up my C3 trying to program it with Arduino IDE.

Now I'm trying to restore it to working condition with ESP-PROG, but I cant find the proper baud rate in the documentation. Can someone help with proper value.


Technical support and documentation manager at Olimex


ESP32-PROG baudrate is variable and minimum and maximum are compliant with those of main chip CH340T, e.g. between 50 and 2milion. The datasheet of CH340T can be found here:

If ESP32-PROG is not recognized by your OS, then try installing the drivers from the product page, under "SOFTWARE" section.

It should get listed as COM port.
Technical support and documentation manager at Olimex


I messed up my ESP32-C3 board with Arduino IDE too, but fixed it by manually connecting GPIO9 to GND and reset to put it back in programing mode.

Windows does not recognize the chip after uploading a simple program
Device USB\VID_0000&PID_0002\6&18d0524&0&1 had a problem starting.

By putting the board in programing mode it is detected as
Device USB\VID_303A&PID_1001\<Board MAC address>

By connecting USB-SERIAL-F to the board I can see the program output, but not via the built-in USB-C, so the question is:

How to enable the built-in USB from Arduino as a serial console?


So you can program the board via the USB but not get serial output on the same USB? Seems like some bug in the Arduino IDE package. I feel like this should be a well-known issue within the Arduino IDE community for ESP32-C3.
Technical support and documentation manager at Olimex


I figured it out:

1. 'USB CDC On Boot' is 'disabled' by default in Arduino IDE
2. I have the habit to keep the serial monitor opened, but it requires reopen after reboot of the board

Also if instead of Serial.print() i use log_n(), then even with 'USB CDC On Boot' disabled, the messages are printed