I am working on Mduino 57r+ model it RS-485 communication. Internally there is a Max 485 converter and the data is logged in serial port 3 tx3 and rx3 but im unable 2 read r write the data in serial 3. I get a error has serial3 was not declared in this scope. I have initialized serial3.begin (9600). What should i do to access serial port 3. If any example of reading holding register in Industrial shields please do share.
I have one more question Rs485 communication through labview how can i fetch data from industrial shiels to labview using modbus communication. If the data is available in serial port 3 how can i read that in labview.
Any help is appreciated and thanks in advance