UART1 pin init in ESP32-C3

[pablogventura]

Hi! I have a MicroPython code that is runing in MicroPython 1.20 in a ESP32-C3 using this line to set the pins to use UART1:
machine.UART(1, baudrate=115200, tx=18, rx=19)

I was trying to update to MicroPython 1.21 and I noticed that now that line raises this excepction:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: invalid pin

I am doing something wrong? Can be possible it is a bug?

Thank you in advance.

[puppet13th]

from version 1.21 they merged build for ESP32_GENERIC_C3, earlier version have 2 build with and without USB.
i just compiled C3 firmware without usb function, and can use pin 18 and 19.
remove this line before compiling the firmware.

[Seruf-Che]

Hi,
Could you please provide a link to the compiled version of firmware?

[pablogventura]

It's works perfect! Thanks you a lot!!!