Hi @Baldhead Have you checked the keep-alive mechanism in the `wss` example (from https_server)? https://github.com/espressif/esp-idf/tree/master/examples/protocols/https_server/wss_server#http-websocket-server-with-ssl-support It's implemented in the main component and uses only public includes fro...

Oh, thanks for the update and for posting the fix! It looks like the same as posted here https://github.com/espressif/esp-lwip/pull/25.

@fpena_inusual Any update on your issue? I've received a patch on esp-lwip fixing pbub links on the SLIP interface. Not sure if it helps fixing your issues, but seems like worth trying. (if it wasn't you who posted the PR)

The code is almost correct (assume you've accidentally pasted the code somewhere into the include section, but the principle seems okay), but you won't receive an IP event when using static address. Also I'd suggest not mixing up the esp-netif and tcpip_adapter API. Here's an example of using esp-ne...

This should work okay without any trouble. Just checked on the latest master. Could you please share the IDF version? The only trouble I think off, could be if these "multiple mqtt brokers TLS/non TLS" is actually one broker with multiple interfaces/protocols (common on mosqutto's). In that case a c...

Hi evalan_floris

I would suggest using v4.1, if you can wait for us to apply some important fixes to the release branch. Some fixes yet need to be backported to the v4.1, see the https://github.com/espressif/esp-idf/is ... -723657688 for the context and for testing locally.

Hi mzimmers,

which IDF version are you using? Is it possible to switch to v4.1 and later? Do you have to use the *tcpip_adapter* API?

Would be it acceptable to workaround this by increasing the MTU size here? https://github.com/espressif/esp-lwip/blob/2.1.2-esp/src/netif/slipif.c#L79 I might be wrong, but it looks like the extra bytes are simply dropped on netif level (here in slipif.c) before getting fragmented. Please note that ...

Hi fpena_inusual,

One possible reason could be that the slip netif doesn't support packets longer than 256 bytes, as per limitation in lwIP (len parameter is uint8_t). There a fix ready for internal review: https://github.com/espressif/esp-idf/pull/5928, Could you please check if that helps?

okay, understand now, thanks for explaining. There's indeed a race condition, as we first switch over to the command mode and then initialise the PPP network interface. This is true for releases v4.0 and earlier. There was a major refactoring of the PPP client and the esp-modem in v4.1 to use the es...