ESP-IDF?

[nagyrobi]

Does not currently work with ESP-IDF framework, as it lacks an arduino-compatible upd multicast library.

But how about just simply broadcast to the entire local network (send the udp packet to just 255.255.255.255)? Or maybe to a configurable target node only?

[Cossid]

Sending is only half the battle (and the easier half), listening and reading in a loop are the parts that are considerably more work and not present. Specifically, esp-idf does not have the arduino equivalent of beginMulticast esp-idf support will come eventually, it's just not immediately. This component works fine on ESP32 with the arduino framework for the time being.

[nagyrobi]

This component works fine on ESP32 with the arduino framework for the time being.

The only real reason for IDF is that beside better performance, there are IDF-only components one wants to use on the same node.

[Cossid]

I'm aware of that, but for now they remain unsupported and on the todo list.

[bkbartk]

I don't know much about esp development, but would this help supporting the unsupported part? https://github.com/espressif/esp-idf/blob/master/examples/protocols/sockets/udp_multicast/main/udp_multicast_example_main.c there is some short description https://github.com/espressif/esp-idf/tree/master/examples/protocols/sockets/udp_multicast

but I don't know if this would automatically be compatible with esphome

[Cossid]

Yes, I'm aware of the esp-idf examples. It definitely needs a wrapper at minimum, and I haven't had the time/priority to look into it further yet.