How to Use Gravity Speech Synthesis module V2.0: Examples, Pinouts, and Specs

The Gravity Speech Synthesis Module V2.0 is a compact and versatile device designed to convert text into speech. It features high-quality audio output and customizable voice settings, making it ideal for a wide range of applications. This module is particularly useful in robotics, interactive projects, assistive technologies, and educational tools where audible feedback or communication is required.

Common applications include:

• Voice-enabled robots and IoT devices
• Interactive kiosks and displays
• Assistive devices for visually impaired users
• Educational projects and learning aids

The Gravity Speech Synthesis Module V2.0 is designed for ease of use and integration into various projects. Below are its key technical details:

The module has a 4-pin interface for easy connection. The pinout is as follows:

1. Power Supply: Connect the VCC pin to a 3.3V or 5V power source and the GND pin to ground.
2. UART Communication: Connect the TX pin of the module to the RX pin of your microcontroller (e.g., Arduino UNO) and the RX pin of the module to the TX pin of the microcontroller.
3. Audio Output: Plug a 3.5mm audio jack into the module's audio output port to connect a speaker or headphones.

• The module uses UART communication to receive ASCII text or control commands.
• Text sent to the module is converted into speech and output through the audio jack.

Below is an example of how to use the Gravity Speech Synthesis Module V2.0 with an Arduino UNO:

#include <SoftwareSerial.h>

// Define the pins for SoftwareSerial
SoftwareSerial speechModule(10, 11); // RX, TX

void setup() {
  // Initialize the serial communication with the module
  speechModule.begin(9600); // Default baud rate for the module
  Serial.begin(9600);       // For debugging via Serial Monitor

  // Send an initial message to the module
  speechModule.println("Hello, welcome to the project!");
  Serial.println("Speech module initialized.");
}

void loop() {
  // Example: Send a message every 5 seconds
  speechModule.println("This is a test message.");
  Serial.println("Message sent to speech module.");
  delay(5000);
}

• Baud Rate: Ensure the baud rate of the module matches the settings in your code (default is 9600 bps).
• Power Supply: Use a stable power source to avoid noise or distortion in the audio output.
• Audio Output: Use an amplified speaker for louder output if needed.

1. No Audio Output

   • Solution: Check the power supply and ensure the module is properly connected. Verify that the audio jack is securely plugged in and the speaker is functional.

2. Garbled or No Speech

   • Solution: Ensure the baud rate in your code matches the module's default (9600 bps). Check the UART connections (TX and RX) for proper wiring.

3. Module Not Responding

   • Solution: Verify that the module is receiving power. Double-check the connections and ensure the microcontroller is sending valid ASCII text.

4. Low Audio Volume

   • Solution: Use an amplified speaker or adjust the volume settings if supported by your audio device.

Q: Can I change the voice settings (e.g., pitch or speed)?
A: The module supports certain control commands for adjusting voice parameters. Refer to the manufacturer's command set documentation for details.

Q: Can I use this module with a Raspberry Pi?
A: Yes, the module can be used with any device that supports UART communication, including Raspberry Pi. Ensure proper voltage levels and connections.

Q: What is the maximum text length the module can process?
A: The module can process up to 80 characters per command. For longer text, split it into multiple commands.

Q: Is the module compatible with 3.3V logic?
A: Yes, the module supports both 3.3V and 5V logic levels, making it compatible with a wide range of microcontrollers.

By following this documentation, you can effectively integrate the Gravity Speech Synthesis Module V2.0 into your projects and bring them to life with high-quality speech output!