There is no modbusTCP on lwIP. Go to the ones who wrote that and ask them for help. 1.3.2 is a version perhaps older than the STM32 itself, you should get a more up to date framework for your endeavours.
Before you do that, try to know at least if TCP is connecting. ModbusTCP is a simple protocol, a client connects to a server and sends a request; a timeout means that either the connection or the transaction did not succeed. You can debug either with the proper tools (wireshark) _______________________________________________ lwip-users mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/lwip-users
