How to Use jJQ6500: Examples, Pinouts, and Specs

The jJQ6500 is a low-power audio playback module designed for embedded systems. It supports various audio formats, including MP3 and WAV, making it ideal for applications requiring sound effects or music playback. The module is compact, easy to integrate, and features a straightforward interface for control. It is commonly used in projects such as interactive displays, toys, alarms, and voice prompts.

• Interactive kiosks and displays
• Toys and educational devices
• Alarm systems with voice prompts
• Audio playback in IoT devices
• Custom sound effects for embedded systems

The jJQ6500 module is designed for efficient audio playback with minimal power consumption. Below are its key technical details:

The jJQ6500 module has a simple pinout for easy integration. Below is the pin configuration:

The jJQ6500 module is straightforward to use in a circuit. It can be controlled via UART commands or GPIO pins for basic playback functionality.

1. Power Supply: Connect the VCC pin to a 3.3V or 5V power source and the GND pin to ground.
2. Audio Output: Use the DAC_R and DAC_L pins to connect to an external amplifier or speaker.
3. Control:
   • For UART control, connect the TX and RX pins to a microcontroller (e.g., Arduino).
   • For GPIO control, use IO1 and IO2 to trigger specific playback functions.

Below is an example of how to control the jJQ6500 module using an Arduino UNO via UART:

• Connect VCC to the Arduino's 5V pin.
• Connect GND to the Arduino's GND pin.
• Connect the RX pin of the jJQ6500 to the Arduino's TX pin (pin 1).
• Connect the TX pin of the jJQ6500 to the Arduino's RX pin (pin 0).

#include <SoftwareSerial.h>

// Define RX and TX pins for SoftwareSerial
SoftwareSerial audioSerial(10, 11); // RX = pin 10, TX = pin 11

void setup() {
  // Initialize serial communication with the jJQ6500 module
  audioSerial.begin(9600);
  Serial.begin(9600); // For debugging

  // Play the first track on the module
  playTrack(1);
}

void loop() {
  // Add your main code here
}

// Function to play a specific track
void playTrack(int trackNumber) {
  audioSerial.write(0x7E); // Start byte
  audioSerial.write(0x03); // Command length
  audioSerial.write(0xA0); // Play track command
  audioSerial.write(trackNumber); // Track number (1-based index)
  audioSerial.write(0x7E); // End byte

  Serial.print("Playing track: ");
  Serial.println(trackNumber);
}

• Ensure the power supply voltage is within the specified range (3.3V to 5V).
• Use a decoupling capacitor (e.g., 10µF) near the power pins to reduce noise.
• If using an external microSD card, format it as FAT32 and ensure the audio files are named sequentially (e.g., 001.mp3, 002.mp3).
• Avoid connecting the module's TX pin directly to a 5V microcontroller's RX pin without a voltage divider or level shifter.

1. No Sound Output

   • Cause: Incorrect wiring or missing audio files.
   • Solution: Verify the connections to the DAC_R and DAC_L pins. Ensure the audio files are correctly formatted and stored on the microSD card or internal flash.

2. Module Not Responding to Commands

   • Cause: Incorrect UART baud rate or wiring.
   • Solution: Ensure the UART baud rate is set to 9600. Double-check the TX and RX connections.

3. Distorted Audio

   • Cause: Insufficient power supply or incorrect audio output connections.
   • Solution: Use a stable power source and ensure proper connections to the amplifier or speaker.

4. MicroSD Card Not Detected

   • Cause: Improper formatting or incompatible card.
   • Solution: Format the card as FAT32 and ensure it is within the supported size range (typically up to 32GB).

Q: Can the jJQ6500 play audio files directly from its internal flash?
A: Yes, the module can store and play audio files from its built-in flash memory (up to 8MB).

Q: What is the maximum number of tracks the module can handle?
A: The module can handle up to 255 tracks, provided they are named sequentially.

Q: Can I control the volume of the audio playback?
A: Yes, volume control commands can be sent via UART to adjust the playback volume.

Q: Is the module compatible with 3.3V microcontrollers?
A: Yes, the jJQ6500 is compatible with both 3.3V and 5V logic levels.