Micropython on ESP32-C3 GPIO18 and GPIO19 cannot be configured as ordinary GPIO

[orztrickster]

from machine import Pin
gpio18=Pin(18, Pin.OUT)
ValueError: invalid pin

How do I set this up?

[robert-hh]

Pin 18 and 19 are reserved for Serial JTAG when the respective flag is set. That flag is set for ESP32_GENERIC_C3 and LOLIN_C3_MINI. To get rid of that, you would have to build your own firmware and remove the setting of CONFIG_ESP_CONSOLE_USB_SERIAL_JTAG=y in boards/ESP32_GENERIC_C3/sdkconfig.c3usb.

[orztrickster]

Thank you for your response.
Is it necessary to modify the sdkconfig.c3usb file? Is there a way to directly modify it within the MicroPython code?

[robert-hh]

You can of course get it to work using Python code by programming the respective registers of the GPIO using machine.mem32() methods. But that is tedious.

[JustDr00py]

The new micropython doesnt have this option? any suggestions.