Blynk

Установка и настройка:

https://github.com/blynkkk/blynk-server/blob/master/README.md#quick-local-server-setup-on-raspberry-pi

Интересная статья

https://www.hackster.io/vshymanskyy/control-quadcopter-from-your-phone-in-30-minutes-938251?ref=platform&ref_id=4889_trending___&offset=2