Open Hard- & Software DokuWiki Module MicroController
https://docs.micropython.org/en/latest/esp32/quickref.html
# PIN_UART0_TX = 1 # USB PIN_UART0_RX = 3 # USB # PIN_UART1_RX = 25 # 9 - not usable PIN_UART1_TX = 26 # 10 - not usable # PIN_UART2_RX = 16 PIN_UART2_TX = 17 #