How to Use emic-2 TTS module: Examples, Pinouts, and Specs

The Emic-2 Text-to-Speech (TTS) module is a compact and versatile device designed to convert text input into natural-sounding speech. It supports multiple languages, including English and Spanish, and offers adjustable speech parameters such as pitch, speed, and volume. This module is ideal for applications in robotics, assistive technology, interactive kiosks, and other projects requiring audio feedback or voice interaction.

Common applications and use cases:

• Robotics: Adding voice interaction to robots for enhanced user experience.
• Assistive technology: Providing audio feedback for visually impaired users.
• Interactive projects: Creating talking devices or systems for education and entertainment.
• Home automation: Enabling voice notifications in smart home systems.

The Emic-2 TTS module is designed for ease of use and integration into various projects. Below are its key technical details and pin configuration.

The Emic-2 TTS module is straightforward to use and can be easily integrated into microcontroller-based projects, such as those using an Arduino UNO. Below are the steps to use the module effectively:

1. Power the Module: Connect the VCC pin to a 3.3V or 5.0V power source and the GND pin to ground.
2. Serial Communication: Connect the SIN pin to the TX pin of your microcontroller (e.g., Arduino UNO) and the SOUT pin to the RX pin (optional, for debugging).
3. Audio Output:
   • For direct speaker output, connect a small 8-ohm speaker to the SP+ and SP- pins.
   • Alternatively, use the onboard 3.5mm audio jack for line-level output to an amplifier or headphones.

The module uses simple ASCII commands to control its operation. For example:

• S followed by text: Speak the provided text.
• Vn: Set volume (n = 0 to 15).
• Pn: Set pitch (n = 0 to 15).
• Rn: Set speech rate (n = 0 to 15).

Below is an example Arduino sketch to send text to the Emic-2 module and make it speak:

#include <SoftwareSerial.h>

// Define the pins for software serial communication
SoftwareSerial emicSerial(2, 3); // RX = Pin 2, TX = Pin 3

void setup() {
  // Initialize serial communication with the Emic-2 module
  emicSerial.begin(9600); // Default baud rate for Emic-2
  delay(500); // Allow the module to initialize

  // Send a reset command to the module
  emicSerial.print("R\r"); // Reset the module
  delay(1000); // Wait for the module to reset

  // Send a test message
  emicSerial.print("SHello, I am the Emic-2 Text-to-Speech module.\r");
}

void loop() {
  // No actions in the loop for this example
}

• Power Supply: Ensure a stable power supply to avoid unexpected behavior.
• Speaker Selection: Use an 8-ohm speaker for direct output or an amplifier for higher-quality audio.
• Command Formatting: Always terminate commands with a carriage return (\r).
• Initialization Delay: Allow the module a brief delay (500ms to 1s) after power-up or reset.

1. No Audio Output:

   • Verify the power connections and ensure the module is receiving the correct voltage.
   • Check the speaker connections or use the 3.5mm audio jack for testing.

2. Module Not Responding to Commands:

   • Ensure the correct baud rate (9600) is set in your microcontroller code.
   • Verify the SIN and SOUT connections between the module and the microcontroller.

3. Distorted or Low-Quality Audio:

   • Use a properly rated 8-ohm speaker or an external amplifier for better sound quality.
   • Adjust the volume (Vn) command to an appropriate level.

4. Text Not Being Spoken:

   • Ensure the text is properly formatted and terminated with a carriage return (\r).
   • Check for any syntax errors in the commands sent to the module.

Q: Can the Emic-2 module play pre-recorded audio files?
A: No, the Emic-2 is designed specifically for text-to-speech conversion and does not support pre-recorded audio playback.

Q: How many languages does the module support?
A: The module supports two languages: English and Spanish.

Q: Can I use the module with a 3.3V microcontroller?
A: Yes, the module is compatible with both 3.3V and 5.0V systems.

Q: Is it possible to change the voice type?
A: Yes, the module offers multiple voice options that can be selected using specific commands.

By following this documentation, you can effectively integrate the Emic-2 TTS module into your projects and bring your ideas to life with natural-sounding speech!