Arduino Bluetooth HC-05 Code: Connecting and Controlling Your Arduino Board

When it comes to connecting your Arduino board to a Bluetooth module, one of the most popular options is the HC-05. This module is a Bluetooth SPP (Serial Port Protocol) module that communicates with your Arduino via serial communication. In this article, we'll take a closer look at how to connect and control your Arduino board using the HC-05 Bluetooth module.

Connecting the HC-05 Module to Your Arduino Board

The first thing you need to do is connect the HC-05 module to your Arduino board. To do this, you'll need to make sure that the voltage levels are compatible between the two devices. The HC-05 module requires a 3V logic level, while the Arduino TX pin has a 5V output. To avoid damaging the module, you'll need to connect them through a voltage divider.

Fortunately, the HC-05 module comes on a breakout board that contains a voltage regulator. This means it can be powered from 3.6 to 6 volts, making it easy to connect to your Arduino board.

Here's what you'll need to get started:

* Breadboard and jump wires (available on Amazon, Banggood, or AliExpress)

* Arduino Board (available on Amazon, Banggood, or AliExpress)

You can find all the components needed for this project at any of these online retailers.

How the HC-05 Module Works

The HC-05 module is a Bluetooth SPP module that allows you to communicate with your Arduino board using serial communication. This means you can use it to send data from your smartphone to your Arduino board, or vice versa.

One of the key features of the HC-05 module is its ability to be set as either a master or slave device. This means you can use it to connect two separate Arduino boards together, allowing them to communicate with each other wirelessly.

Before we move on to some examples of how to use the HC-05 module with your Arduino board, let's take a closer look at its specifications:

* Module type: Bluetooth SPP (Serial Port Protocol) module

* Communication protocol: Serial communication

* Compatible devices: Arduino boards

* Power requirements: 3.6 to 6 volts

Arduino Code for the HC-05 Module

In this example, we'll use the HC-05 module to control an LED light using a smartphone. To do this, you'll need to write some code for your Arduino board that will communicate with the HC-05 module.

Here's an example of how you can use the HC-05 module to control an LED light:

```c

void setup() {

pinMode(13, OUTPUT);

}

void loop() {

if (Serial.available() > 0) {

char data = Serial.read();

if (data == '1') {

digitalWrite(13, HIGH);

} else {

digitalWrite(13, LOW);

}

```

In this example, the HC-05 module is used to receive data from a smartphone and send it to the Arduino board. The Arduino board then uses that data to control an LED light.

The HC-05 Bluetooth module is a popular choice for connecting your Arduino board to a smartphone or other device. With its ability to be set as either a master or slave device, it's easy to use in a variety of applications.

In this article, we've taken a closer look at how to connect and control your Arduino board using the HC-05 Bluetooth module. We've also provided an example of how you can use the HC-05 module to control an LED light using a smartphone.

With its ease of use and versatility, the HC-05 Bluetooth module is a great choice for any project that requires wireless communication between devices.

Arduino bluetooth hc 05 code