CarLeds is an android app made with unity that lets you communicate with an arduino. Through a set of inputs it is possible to change the color and intensity of the LEDs.
To use the app is necessary an arduino with the code present in "Car_leds/arduino/car_leds/ESP32_BLE_UART_Demo/".
This version uses BLE system.
Install the apk, turn on Bluetooth (there is no need to connect). Then open the application, and enjoy it.
The apk saves info in your device, but it isn't encrypted.