Control Arduino via Bluetooth - how it works

You can easily control the Arduino via Bluetooth. You can find out how to do this in this practical tip.

Control Arduino via Bluetooth - how it works

To operate your Arduino via Bluetooth, you need an HC-05 Bluetooth module.

1. Connect TXD to pin 10 and RXD to pin 11. In addition, you connect the ground and 5V pin.
2. First import the required library in the code with the command "#include" and create it with the command "SoftwareSerial mySerial (10, 11);" a new object.
3. In the setup method, implement the "mySerial.begin (9600);" command to start the module.
4. Now you can easily read out the received data with the command "a = mySerial.readString ()". Note: For this to work, you must first use the "String a;" have defined a new string.
5. You can also use "mySerial.available ()" to check whether a signal has actually been received. Only then does it make sense to read the string.

In the next article, you will learn how to debounce a button on the Arduino.