I would like to use a wifi module that integrates all the functionality of connection and the control of the same to
a private mqtt server and that with simple serial commands is in the possibility of thinking of a module of the expressif equipped with
your operating system.
1) specify ssid, password, crypto for wifi connection on the serial port of the wifi module
2) subscribe to a topic and receive data from broker on the serial port of the wifi module
3) run everything with very low latencies
for the serial dialogue of a wifi module equipped with your OS with an external controller, you have developed a parser or a C library?