I need to connect arduino nano pro as modbus rs485 slave.
I tried sketch with rs232 ftdi basic usb converter with pc such modbus master and work fine.
If I use rs485 breakout to connect arduino nano pro to rs485 it doesn’t work.
I connect the same pc modbus master with usb to rs485 to the rs485breakout but noting.
The pc modbus master and the usb to rs485 converter work fine, i trier with another modbus slave.
How do I connect arduino nano pro and rs485 breakout?
Thanks
Luca