[Paul] picked up a quadcopter kit and started looking at ways to add ... a beacon that can be placed in the backpack. It has a GPS module, an RF modem, and runs a stripped down Python scripting ...

What’s the cheapest quadcopter you can build? As [Circuit Digest] demonstrates with their variant of the ESP-Drone project by Espressif, you only need a minimum of parts: an ESP32 MCU ...