Impossible to join multicast group on RTOS SDK 1.4.x

[gustavo]

I'm trying to use SSDP on the ESP8266 with the RTOS SDK.

I have tried both the 1.4.0 and the 1.4.2 (git 1.4.x branch) but I can't join any group.
I can't even catch any igmp packet from the esp.

I read this thread: viewtopic.php?t=1058 and it seems that at the time it wasn't possible to use multicast on the RTOS SDK.

Please advise.
Gustavo

[gustavo]

It seems to be possible using the espconn api instead of the lwip socket api.

[raspberrypidmx]

Hi Gustavo,

It is possible. I have the following working code with RTOS SDK 1.4.2 :

Code: Select all

void ICACHE_FLASH_ATTR handle_udp_join_group(void) {
   printf("handle_udp_join_group\n");

   struct ip_addr ipgroup;
   struct ip_info local_ip;

   const WIFI_MODE mode = wifi_get_opmode();

   if (mode & STATION_MODE) {
      wifi_get_ip_info(STATION_IF, &local_ip);
   } else {
      wifi_get_ip_info(SOFTAP_IF, &local_ip);
   }

   ipaddr_aton("239.255.0.1", &ipgroup);

   const uint8_t iret = igmp_joingroup(&local_ip.ip,(struct ip_addr *)(&ipgroup));

   if (iret != ERR_OK) {
      printf("Could not join\n");
   }

}

The full code can be found here -> https://github.com/vanvught/rpidmx512/t ... os_sdk_rpi

[gustavo]

I think I tried that at the time...
Either way I got it working with the espconn api.