BC04-B Bluetooth Module Master/Slave Serial CSR

Description

What it is

The BC04-B Bluetooth module from Arduiner is a wireless device used to establish serial connections between Arduino and other devices. It supports both Master and Slave modes, making it versatile for a variety of projects.

Features

• Supports Master/Slave mode
• Compatible with Arduino

What it is for

Ideal for beginners, the BC04-B module allows creating interactive projects without the use of cables. It can be used to implement home alarm systems that send notifications via Bluetooth or any other project that requires a wireless serial connection.

Tutorial: How to use BC04-B Bluetooth Module

The BC04-B Bluetooth module is a versatile device that allows establishing wireless connections between Arduino and other devices. Ideal for beginners, it helps create interactive projects without cables.

What you need

• Arduino Uno or compatible
• USB-A to B cable
• Arduino IDE software

Steps

1. Connect the BC04-B module to the Arduino’s TX and RX pins, make sure to use pull-up resistors to avoid interference.
2. Download the BC04-B module SDK from the official website or the hardware documentation provided.
3. Open Arduino IDE and create a new sketch. Include the SoftwareSerial library following the instructions in the SDK.
4. In the setup(), configure the TX and RX pins for the BC04-B module, then enable serial communication.
5. In the loop(), send data to the BC04-B module using the Serial.write() or Serial.print() command.
6. Make sure your computer’s Bluetooth device is in ‘scan’ mode and search for the device connected via BC04-B.
7. Once the connection is established, try sending data from the BC04-B module to the Arduino and vice versa.
8. Verify that the received commands are correctly interpreted by the Arduino.

Example code

// Includi la libreria SoftwareSerial
#include <SoftwareSerial.h>

// Definisci TX e RX del modulo BC04-B
const int rxPin = 10;
const int txPin = 11;
SoftwareSerial bluetooth(rxPin, txPin);

void setup() {
  Serial.begin(9600);
  bluetooth.begin(9600); // Verifica sul datasheet la velocità corretta
}

void loop() {
  if (bluetooth.available()) {
    char c = bluetooth.read();
    Serial.print(c);
  }
}

Mini project

Create a home security system that sends a Bluetooth notification when the door is opened.

Common mistakes

• The connection does not establish
• The module receives data but does not send it correctly
• Interference between TX and RX of the Arduino

Recommended accessories

• 10kΩ pull-up resistors
• External antenna for Bluetooth
• RTC module for time synchronization
• Wireless sensors compatible with BC04-B

Frequently asked questions

What is the maximum communication range?
Check the datasheet of the BC04-B module

Can I use the module in Master or Slave mode?
Yes, but check the specifications to set the mode correctly

How can I test if the module is working?
Send a message from Arduino and check that it is received by the Bluetooth device