Arduino Drone Flight Controller - Multiwii | With Smartphone Control - YouTube
Guys I had a micro drone and this is its controller, but I don't know how it communicates with the drone, as there is not wifi (like in a usual drone) or
100Pcs ESP8266 ESP 01 ESP 01S Serial WIFI Wireless Transceiver Module 4MB Flash Upgraded version for Arduino UNO Brand New|Drone GPS| - AliExpress
Build Arduino Quadcopter with Complete Source Code and Circuit Diagram
Make a Quadcopter Using ESP8266 - This Quadcopter Can Climb - Hackster.io