I basically have the same question that was asked on jul. 12, 2016:
It is about using MQTT with TLS-coding over a TCP-connection on the HL8548 module. I cant find if this is possible and if so, how to configure this.
It seems it is only available on HTTPS?
Or can I enable TLS-encryption over a TCP connection with MQTT?
I tried searching the forum on Encryption or TLS but i cant seem to find this specific question.