WIZnet Developer Forum

Wiznet W5100 UDP multicast Socket 0

I have a test setup for socket 0 in multicast. I can receive multicast packets but cannot receive unicast packets on this socket.

Is it possible to receive multicast and unicast packets on socket 0 when configured for multicast?

Matt

Hi Matt,

Before set OPEN command on W5100 socket 0 command register, write the Multicasting group
address, Multicasting Hardware Address and port number to S0_DIPR(Destination IP Register),
S0_DHAR(Destination Hardware Address Register) and S0_DPORT(Destination Port Number
Register).

Please Download the link as below. Some of these files have in How to use Multicast document and firmware.
https://www.wiznet.io/wp-content/uploads/wiznethome/Chip/W5100/Application%20Note/W5100_Application_Note.zip

thanks,

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