Hi ESP_Angus, Thank you very much for your answer! Indeed, I also thought about the fact that the entire send buffer would fit inside the TCP window on the Ubuntu PC, but not on the ESP, this could cause the long delays that I am seeing (most probably). I did not attempt to increase the TCP_WND on t...

Hi all, I've searched this forum and quite a lot on google as well, but I can't find an explanation. I am working on a project which uses the ESP32 as a TCP socket client which only sends data to a TCP server (no receiving, just sending). I am using the lwIP stack with standard UNIX sockets API (con...