UNO SPE Shield libraries

[ptillisch]

You are welcome. I'm glad if I was able to be of assistance.

@joaquinmart256

this makes me understand that I just need to declare Serial1, wich is physically connected to those pins (TX, RX) and also the enablers to control the RS485 chip and send and read the data using the serial port as usual.

Note that the "ArduinoRS485" library uses Serial1 on the UNO R4 Minima by default:

src/RS485.cpp

src/RS485.h

src/RS485.h

So you don't need to explicitly configure the HardwareSerial object of the serial interface and the TX pin number in your sketch.

It is only necessary to use the library's constructor in your sketch in the case where you want to use a different serial interface than the one configured in the library by default. Doing so wouldn't really make sense with the UNO R4 Minima, for which the core only provides a single HardwareSerial object. However, it could be useful for other boards that have multiple HardwareSerial objects (e.g., if you had a project using the Arduino Mega 2560, which has multiple hardware serial objects, and Serial1 was already in use for another purpose so you found it convenient to use the board's Serial2 for the RS-485 interface).