Max485 Modbus rtu between opta and uno

Projects Networking, Protocols, and Devices
1

Hello I can't get any response from the uno . I have tried so many libraries now . Now latest ;
#include <ArduinoRS485.h>
#include <ArduinoModbus.h>
together with ;
""
DE -> Pin 4
RE -> Pin 5

RS485.setPins(1, 4, 5);
""

read from the forums. 
Nothing works ?? Any suggestion on a sktech/ librarie that works ? 
The problems seems to be in the response part. The opta seems to do its job well. And until it turns off because off no response the write single command works fin.
Many many Thanks if someone will help me !
2

Hello ! I didn't get so many answers here but I found the solution myself and I write it here so that it might help someone else.
The library that worked finally was:ModbusRTUSlave**

  1. /ModbusRTUSlaveExample

ModbusRTUSlaveExample.ino

and when I added the instruction to the code:
modbus.setResponseDelay(20);
then finally my opta could receive a response.
Hopefully this will help someone else get their Modbus rollin!
/ M