Setting up a SSL server

I am looking for suggestions on how to setup a simple SSL server that listens on a port and when a device coects, tell the device to discoect, and then executes a command

Context: The device is an Amazon dash and when it coects the message is encrypted, but I don't care about the message.

I will be ruing this on an openwrt router

I read about using netcat and openssl s_server, but I would like feed back and suggestions on the best way to implement this.