> I am using lwip for Modbus and Http application.
> I have used raw api for both the application.
> I am facing disconnect problem with modbus application while http
> application is running.
> Web page is auto refeshing at 3 seconds.
> kindly let me know what are the reasons and where should i look in firmware
> to solve the problem.
First, I'd Wireshark it... WS is brilliant in diagnosing Modbus
problems. If your TCP and Modbus stuff is OK there, move into lwIP
debugging... turn on the trace features etc.