I am trying to find a simple example of using Modbus to link several Arduino Boards, simply sending digital and analogue signals from the Master to each Slave. Modbus seems overkill but the application involves large distances outdoor lighting. I have worked through the tutorials:
Long Distance Wired Serial Communication with Arduino using RS485 and CAT Cables
I have made this work but this only works for one Slave
RS-485 MODBUS Serial Communication using Arduino UNO as Slave
RS-485 MODBUS Serial Communication with Arduino as Master
Both of these involve a link to a computer and I can't work out how to adapt them to Arduino to Arduino.
Any assistance will be gratefully received
PS. The tutorials are very good with full detail.