Hi Joe, udp_sendto is the right API to transmit udp data. Did you have a chance to use the wireshark to see what you are transmitting on the network and if the node you are sending data to is receiving the data. If the receiving node is receiving the data then I think the LwIP stack has properly handled your transmission. Here is a post that you might have looked at. Hope it will help you too. https://e2e.ti.com/support/microcontrollers/other/f/908/t/723207
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