Good afternoon. I repeated the loopback_udps() example. STM32 receives data from PC. When sending data from STM32 to PC (sendto() function) always returns -13(SOCKERR_TIMEOUT). Data is not transmitted from STM32 to PC. Wireshark does not catch packets. Tell me what could be the problem.

[udp-receive] page 68 of the W5100 manual.

W5500 UDP sendto() timeout

Eugeny October 8, 2022, 4:54pm 2

As soon as you get packets, MAC address, source IP address, mask, gateway IP address ad source port number must have been set properly. What is about destination IP address and destination port?

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Not seeing UDP packets via wireshark using sendto function

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W5500 UDP sendto() timeout

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