Here we use HC -05 Bluetooth module for the communication between the Arduino and Android app. Whenever you press up button in the app it sends the signal as 1 to the Arduino so the program goes into that state. Similarly 2 for down, 3 for left, 4 for right, and 5 for stop.
You can use this app for your own project by changing the code according to your convenience. You can use this code for home automation also by using relays.
The default password for connecting the Bluetooth is
as password in rare cases.
For app in playstore: https://play.google.com/store/apps/details?id=appinventor.ai_ksjones777.REMOTE_CAR_LOVELYIDEAS
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