Support for embedded-tls?

[flyaruu]

Hi, I've been trying to get rust-mqtt to work with embedded-tls. I'm not sure if it is supported at all (only sign I found is the 'tls' feature)

Originally for an ESP32C3, but switched to std/tokio until I've got this working.

I've managed to get an encrypted connection up and running, and pass that into the rust-mqtt client, but it seems to hang in the connect_to_broker method, until it finally times out.

Maybe something doesn't get flushed properly? I can dig more, but I thought I'd reach out first.

Gist of my example: https://gist.github.com/flyaruu/71f9448474be28f0c9050fdcc86cbba8

(If I remove the TLS stuff, and pass the tcp connection straight into the mqtt_client (with a FromTokio) it works fine)

Any ideas?

[obabec]

@flyaruu If I remember correctly, I have tried it with embedded tls. However, it is a long, long time ago.

[tlhenvironment]

@flyaruu , did you figure this out in the end on the ESP?

[JadKHaddad]

send should write_all and flush

[tlhenvironment]

Thanks @JadKHaddad, got it to work the ESP32 with your fix 👍
Gist for reference.