Bluetooth-car

Chinise car with two motors upgrades to bluetooth car

What is used:

1. Arduino UNO (Copy).
   • I have been trying with Nano, but it does not worked for me. Maybe i am try later again ;)
2. Bluetooth module HC-05.
   • For easy way do not use HC-06 because of problem with Master-Slave.
3. L298N driver for two motors with switch button.
4. Chinise remote car.
   • I have cutted off all except for 2 motors.
5. Bluetooth RC Controller app (Android)

Do not forget: ------!!!!!!!!!------

1. Bluetooth Rx to Uno Tx
2. Bluetooth Tx to Uno Rx
3. L298N power GND to Uno GND.
4. Create the bluetooth pair: Smartphone + HC-05 before open the app (Android 10, maybe it is needed for earlier OS).
5. App always send 'S' (Stop)
6. Do not use any libraries. As i understand it does not work correct.

How does it works:

1. Uno creates Serial on 9600 with HC-05.

   • HC-05 works on 9600, HC-06 on 38400.

2. Uno sets LOW signal to motors.

   • digitalWrite(motorForward, LOW);
   • digitalWrite(motorBack, LOW);

3. HC-05 connects to smartPhone and getting bytes like F - forward, B - backword... e.t.c from the app every 50 ms.

   • S S S S S S S F F F F F S S B B B... e.t.c

4. Uno goes into Loop and Starts to read Serial port.

   • if command from serial matches to one of the case, Uno set HIGH signal to one of the motors.

5. If command does not match it is ignored.