Disable RTS/CTS in Software

[benjaminaigner]

Dear @earlephilhower ,

I've ran into a problem with the default setting of RTS & CTS on an Arduino Nano RP2040 connect.

Because we don't need these pins and I don't want to use up other GPIOs it would be wonderful if
it is possible to disable the HW flow control at all.

Is this possible?

Because in SerialUART.cpp:425-429 Serial2 is always instantiated with CTS & RTS enabled, on GPIO28/27.

This blocks A1&A2, and it is not possible to use setRTS/setCTS with UART_PIN_NOT_DEFINED.

THX for advice & keep up that great repository!

[earlephilhower]

You should be fine just using Serial2.setRTS(UART_PIN_NOT_DEFINED) (and CTS) as long as you do them before begin() after #881 is merged.

[benjaminaigner]

Wow, THX for this quick fix!

[earlephilhower]

No worries. Easy fixes get done fast!