Wiz750SR with TCP_NODELAY

Question

with Wiz750SR module there is the possibility to have socket open with TCP_NODELAY set? i’m using it in a application where the comunication is done with small packet frequent and in near real time, bidirectional, with the high speed working i will see some delay on the packet reception, but mainly is not stable like it depends from other packets… on the network there is only one Wiz750SR and a Gigabit Ethernet adpater of the PC. (maybee in future can be also a raspberry or two on the same network, but not connected to internet or other device…) i can disable on the PC software the TCP_NODELAY, but if there is on the Wiznet module i solve only a partial of the problem, not the complete… Best Regards… Davide Valdinoci

becky · Answer

WIZ750SR has TCP_NODELAYACK set. If you want to disable it, you can modify the code to use it. Please Tell me more about your problem.

becky · Answer

Sorry, i don’t understand your problem. teaelettronica: but mainly is not stable like it depends from other packets… Is this your problem? Please tell me the specific symptoms. teaelettronica: the size parameter in the data packing section, can be used to send immediately the tcp message, when received the number of chars indicated? and in case can be combined with the Time (in ms) to ship immediately when the timeout between char expiry? Do you want to add delay? It is possible by modifying code. please tell me more about “the timeout between char expiry?” Even if the response packet is not sent immediately, the ACK is sent automatically, so Timeout doesn’t occurred for the TCP connection. It may be different if you are saying a different timeout.