I am using ISO3082DWG4 for my RS485 circuit. In that, We define chip characteristics in .dts file as per below.
After that, when we establish connection between module and laptop below observation is noted.
Observation: Once we established connection successfully and start sending data using my laptop(running terminal application) to our RS485 module(running cutecom application), we are able to receive data until sending anything from module to laptop. Once we send anything from module to laptop after that we are not getting anything from laptop to board. Also we change voltage between ground and direction pin before any sending from module to laptop is 0V and once we send then getting continuous 3.3V supply on direction pin.