Pin 1 of my Nano 33 BLE has been damaged (more on this here), preventing me from using Serial1. I'm already using the second hardware UART, so I would like to fix Serial1.
Is it possible to reassign Serial1 RX to another pin? Will it work if I modify this line in core? Is there another solution ? (from sketch)
Thanks.
(@facchinm, I'm allowing myself to notify you as you are the one involved in this area)
No it a fixed peripheral on the chip.
No because that is pointing the code at where the hardware UART is.
Possible use a software serial library, but it has limitations.
Get a UART port expander to connect to the I2C or SPI bus.
Like this one MAX14830 Datasheet and Product Info | Analog Devices
Be aware that using analogue multiplexers is not a real answer.
You may not be able to fix Serial1 but you should be able to add another hardware serial port with this
UART mySerial(digitalPinToPinName(4), digitalPinToPinName(3), NC, NC);
You can change 4 and 3 to other pins as the processor can mux any functionality on any pin.
https://forum.arduino.cc/t/adding-an-additional-uart-port-in-arduino-nano-33-ble/976661
https://github.com/arduino/ArduinoCore-nRF528x-mbedos/issues/38
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