This is my first thread in this forum. I am using Nodmecu unit from amica and Arduino 1.8.5.
I am trying to interface nodemcu with Modbus RTU device. When i connect Tx and rx line The device works normally.There is no issue in communication
Problem i am facing while communicating while restart of nodemcu or power off to power on.During this situation device wont come online itself. If i remove the tx and rx line if it restart/ Reset device start communicating . it start receive response when device tx and rx line connected. during this stage i wont get any problem in communication.
How can i overcome this issue. as product i wanna sale.It wont work at all unlsess tx and rx line are isolated. Some application where tx and rx lines used as digitalo it wont lead any problems.