To get you startet the ESP8266 firmware has asyncio primitives from Peter Hinch included
uasyncio, uasyncio.core, mqtt_as.py and asyn.py are requiered for Microhomie.
switch.py asyncio switch class
Simple debounced switch class for normally open grounded switch.
pushbutton.py asyncio pushbutton class
Extend the Switch class to support logical state, long press and double-click events
Author: Peter Hinch
mqtt_as.py is a "resilient" asynchronous non-blocking MQTT driver. In Microhomie we use the patched version from Kevin Köck. Kevins version use keywords to initialize the mqtt_as object, support for "unsubscribe" and support for the unix port of MicroPython.
Author: Peter Hinch, Kevin Köck