Arduino Bluetooth Kit - Free

Features:

- Read & write digital pins.
- Read & write PWM pins.
- Control SERVO motors.
- Read analog pins.
- Charts: for monitoring sensors data.
- LCD: you can send any data from Arduino to your mobile phone.
- Terminal: you can send any data from mobile phone to your Arduino.
- Super easy user interface.
- Remember last status of the pins.
- Change the mode of the pin (Output, PWM, SERVO or Input).
- Automatic connect to Arduino.
- Ability to rename the label of each pin.

Applications:

- Smart Home.
- Automation.
- Hoppy projects.
- Schools & university projects.
- Remote control.
- Robots control.

Requirements:

- Any of Arduino (Uno, Mega, Leonardo, Feather32u4 BLE)
- Bluetooth Module:
- iOS useres(BLE only e.g. Adafruit Bluefruit, HM-10, CC2541, TI, Redbear, Seeeduino, or any hardware with a "Serial Like" service.)
- Android (Classic or BLE e.g. HC-06,HC-05, Adafruit Bluefruit).

Check this youtube to see in real world:
- https://youtu.be/EmQELmq86A4