ASK: R58 4G Industrial Router's Serial port not working

ANSWER:

Problem (1): I can get heartbeat from client on the TCP Server, but PLC data can’t come

Solution: check the baud rate of router and PLC, make sure their parameter settings are same.

Problem (2): I can’t get heartbeat and PLC data from client on the TCP Server.

Solution: check the TCP server and port, make sure they are allowed to visit.