How to send data by muticast?

Question

It is W5500,it can’t send data by muticast. for example :the muticast ip is 224.0.0.1; port is 18688; u8 MutiCastIp={224,0,0,1}; u16 MutiCastPort=18688; u8 MutiCastStr=“some data”; I first creat socket as follow: socket(6, Sn_MR_UDP, MutiCastPort, Sn_MR_MULTI); and then send the data: sendto(6, (uint8_t *)MutiCastStr, sizeof(MutiCastStr), MutiCastIp, MutiCastPort); I use a software tool to lisen the port,but it can’t receive any data. Thanks!

imeumimeum · Answer

I solved the problem,thanks.

smashing · Answer

how you solved the problem. I use this code: u8 MutiCastIp={234,6,6,7}; u16 MutiCastPort=3000; u8 MutiCastStr[1024]; I first creat socket as follow: socket(3, Sn_MR_UDP, MutiCastPort, Sn_MR_MULTI); and then send the data: len =sendto(3, (uint8_t *)MutiCastStr, 536, MutiCastIp, MutiCastPort); there is no error of sending len = 536, but I can not receive any data on PC Regards, Smashing

hjjeon0608 · Answer

Hi, smashing I think you should check PC side. Or router could block broad cast packet.