ArduinoModbus library error with Zero Boards

Projects Programming
1

I have a code I'm using woth Mega board and works fine, If I move to Arduino zero , the same library return these errors (Arduino Modbus library)

..\Documents\Arduino\libraries\ArduinoRS485\src\RS485.h:35:30: error: 'A6' was not declared in this scope

*.\Documents\Arduino\libraries\ArduinoRS485\src\RS485.cpp:191:62: note: in expansion of macro 'RS485_DEFAULT_DE_PIN'

  • RS485Class RS485(SERIAL_PORT_HARDWARE, RS485_DEFAULT_TX_PIN, RS485_DEFAULT_DE_PIN, RS485_DEFAULT_RE_PIN);*

NOTE: I'm not using Modbs RS485, just Modbus TCP

How to fix it?

2

The library was written for the MKR series of Arduinos. It was never adapted for the Zero and some other boards.
You can edit RS485.h and change the lines

#define RS485_DEFAULT_DE_PIN A6
#define RS485_DEFAULT_RE_PIN A5

so the pins match your actual values.

3

what is the right synthax for Arduino 0?

4

As you failed to provide a wiring diagram of your setup, we cannot tell you that.

5

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