Hi everyone,
I'm struggling with RS485 Modbus RTU communication between Arduino Opta RS485 and Waveshare Modbus RTU Relay (16/32CH).
Does anyone have experience with this combination? Any advice or known working configs?
Wiring:
Opta A- → Waveshare B-
Opta B+ → Waveshare A+
GND → GND
A+ <-> GND:2.095V, B <-> GND:1.755V