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How to Connect a Bluetooth Module with a Bluetooth TTS App Using Arduino Code

How to Connect a Bluetooth Module with a Bluetooth TTS App Using Arduino Code

January 05, 2025 Digital

How to Connect a Bluetooth Module with a Bluetooth TTS App Using Arduino Code

Connecting a Bluetooth module to a Text-to-Speech (TTS) app using an Arduino is a great way to automate voice output directly from your projects. This guide will walk you through the process, including the necessary components, wiring, and Arduino code required for this setup.

Components Needed

Arduino board e.g., Arduino Uno Bluetooth module (HC-05 or HC-06) Jumper wires Smartphone with a Bluetooth TTS app installed, such as Google Text-to-Speech

Wiring the Bluetooth Module

To connect the Bluetooth module to the Arduino, follow these steps:

VCC: Connect the HC-05/HC-06 VCC to Arduino 5V GND: Connect the HC-05/HC-06 GND to Arduino GND TXD: Connect the HC-05/HC-06 TXD to Arduino RX Pin 0 RXD: Connect the HC-05/HC-06 RXD to Arduino TX Pin 1

Note: A voltage divider might be needed to prevent damage to the HC-05/HC-06 RX pin since Arduino TX is 5V.

Arduino Code

Below is a simple Arduino sketch that sends a string of text to the Bluetooth module, which can then be read by the TTS app. This example uses the SoftwareSerial library to handle the serial communication.

Include the SoftwareSerial library:

#include SoftwareSerial.h

Below is the example Arduino code:

// Create a software serial port
SoftwareSerial BTSerial(10, 11); // RX, TX Use pins 10 and 11 for software serial
void setup() {
  // Start communication with Bluetooth module
  (9600); // Default baud rate for HC-05/HC-06
  (9600);   // Start serial monitor
}
void loop() {
  // Send text to the Bluetooth TTS app
  String message  "Hello, this is from Arduino!";
  (message);
  delay(5000); // Wait for 5 seconds before sending again
}

Instructions

Upload the Code: Connect your Arduino to your computer and upload the above code using the Arduino IDE. Pair the Bluetooth Module: Turn on Bluetooth on your smartphone. Pair with the Bluetooth module, usually named HC-05 or HC-06. Open the TTS App: Open your chosen TTS app on your smartphone. Set the app to receive text from the Bluetooth connection. Run the Arduino: Once the code is uploaded, the Arduino will start sending messages to the Bluetooth module, which will be received by the TTS app.

Notes

Ensure that the baud rate in the software serial matches the baud rate of the Bluetooth module. You can modify the message variable in the code to send different texts. The TTS app may have specific settings for receiving Bluetooth text, so refer to the app's documentation if needed.

This setup will allow you to send text to your Bluetooth TTS app using an Arduino and a Bluetooth module, making your projects more interactive and user-friendly.

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