UPDATE: Code not working with iOS 12.2: https://www.redmondpie.com/ios-12.2-will-prevent-motion-orientation-access-in-safari-unless-enabled/

Use the ESP-12E WiFi module and the gyro sensor of your smartphone to control a robot

• ESP-12E on NodeMCU 1.0
• H bridge L298N
• 2x DC motors

• Add ESP boards via Preferences / Settings and add the following url into the Additional Board Manager URLs: http://arduino.esp8266.com/stable/package_esp8266com_index.json
• Add ESPAsyncWebServer library: https://github.com/me-no-dev/ESPAsyncWebServer
• Add ESPAsyncTCP library: https://github.com/me-no-dev/ESPAsyncTCP
• Install the Arduino ESP8266 filesystem uploader to make use of SPIFFS filesystem (https://github.com/esp8266/arduino-esp8266fs-plugin)
  • This plugin allows you to upload html files directly to the ESP
  • All files stored in the data subfolder of your Arduino sketch path will be uploaded
• Board Settings:
  • Board: "NodeMCU 1.0 (ESP-12E Module)"
  • Flash Size: "4M (1M SPIFFS)"

• Upload the Arduino Sketch File with the recommended board settings.
• Upload the html file by cklicking on "Tools" --> "ESP8266 Sketch Data Upload"
• Connect to the Wifi network created by the ESP
• Open your webbrowser and go to 192.168.4.1