How to Use Grove Speech Recognizer: Examples, Pinouts, and Specs

The Grove Speech Recognizer, manufactured by Seeed Technology Co., Ltd, is a versatile module designed to enable voice command recognition. This component allows users to control devices through spoken words, making it ideal for applications in home automation, robotics, and interactive projects. The module is easy to integrate with microcontrollers such as the Arduino UNO, providing a seamless way to add voice control to your projects.

1. Power Supply: Connect the VCC pin to a 3.3V or 5V power supply and the GND pin to the ground.
2. UART Connection: Connect the RX pin of the module to the TX pin of the microcontroller and the TX pin of the module to the RX pin of the microcontroller.
3. Initialization: Initialize the UART communication in your microcontroller code to communicate with the module.
4. Command Recognition: Use the pre-defined commands to control your devices. The module can recognize up to 22 different commands.

• Power Supply: Ensure that the power supply is stable and within the specified range (3.3V to 5V).
• Distance and Angle: For optimal performance, maintain a recognition distance of around 1 meter and a recognition angle of 30 degrees.
• Noise Environment: Use the module in a relatively quiet environment to avoid false recognitions.
• Command Training: The module comes with pre-defined commands. Custom commands are not supported.

#include <SoftwareSerial.h>

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

void setup() {
  // Start the hardware serial communication
  Serial.begin(9600);
  // Start the software serial communication
  mySerial.begin(9600);
  Serial.println("Grove Speech Recognizer Test");
}

void loop() {
  // Check if data is available from the speech recognizer
  if (mySerial.available()) {
    // Read the data from the speech recognizer
    int command = mySerial.read();
    // Print the received command to the serial monitor
    Serial.print("Command Received: ");
    Serial.println(command);
    
    // Perform actions based on the received command
    switch (command) {
      case 0x11:
        Serial.println("Turn on the light");
        // Add code to turn on the light
        break;
      case 0x12:
        Serial.println("Turn off the light");
        // Add code to turn off the light
        break;
      // Add more cases for other commands
      default:
        Serial.println("Unknown command");
        break;
    }
  }
}

1. No Response from the Module:

   • Solution: Check the power connections and ensure the module is properly powered. Verify the UART connections (RX and TX) between the module and the microcontroller.

2. Incorrect Command Recognition:

   • Solution: Ensure you are speaking clearly and within the optimal distance and angle. Reduce background noise and try again.

3. Module Not Recognizing Commands:

   • Solution: Verify that the module is initialized correctly in the code. Check the baud rate settings and ensure they match between the module and the microcontroller.

• Check Connections: Ensure all connections are secure and correct.
• Verify Power Supply: Use a stable power supply within the specified voltage range.
• Use Serial Monitor: Utilize the serial monitor to debug and check the data received from the module.
• Consult Documentation: Refer to the manufacturer's datasheet and user manual for detailed information and troubleshooting tips.

By following this documentation, users can effectively integrate and utilize the Grove Speech Recognizer in their projects, enabling voice command control with ease.