listenMulticast - slow packet handling?

[QuadCorei8085]

Having an ESP8266 running in AP mode and sending multicast packets each 100ms I receive the packets on the client (connected in STA mode to the AP) with the following timestamps:

Time 22369, Data: hello 7 Time 22644, Data: hello 8 Time 22645, Data: hello 9 Time 22669, Data: hello 0 Time 22951, Data: hello 1 Time 22952, Data: hello 2 Time 22971, Data: hello 3 Time 23258, Data: hello 4 Time 23259, Data: hello 5 Time 23269, Data: hello 6 Time 23565, Data: hello 7 Time 23566, Data: hello 8 Time 23569, Data: hello 9 Time 23872, Data: hello 0 Time 23873, Data: hello 1 Time 23875, Data: hello 2 Time 23970, Data: hello 3 Time 24184, Data: hello 4 Time 24185, Data: hello 5 Time 24269, Data: hello 6 Time 24487, Data: hello 7 Time 24488, Data: hello 8 Time 24569, Data: hello 9 Time 24793, Data: hello 0 Time 24795, Data: hello 1

AP side code: ` udp.listenMulticast(IPAddress(239,1,2,3), 1234); tick.attach_ms(100, &udp_send);

void udp_send(void) { udp.print(String("hello ") + String(cnt++)); cnt %= 10; } `

STA side code: `
udp.listenMulticast(IPAddress(239,1,2,3), 1234); udp.onPacket(&onUdpPacket);

void onUdpPacket(AsyncUDPPacket& packet) { Serial.println(String("Time ")+String(millis())+ String(packet.data())); } `

When using unicast the timstamps are spot on. Any idea what causes the timing issue (that packets are incoming in bursts of 2-3-4 and 3-400ms delay between them)?

[ascillato]

Hi,

On the readme of a repo that uses this library (https://github.com/envy/esp-knx-ip/tree/async-udp) say:

In my case, this was fixed by disabling IGMP snooping on the wifi Router/Switch

Have you tried that?

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