How to Use Ai-Thinker GP-02 Precision GPS/GNSS Module: Examples, Pinouts, and Specs

The Ai-Thinker GP-02 is a compact and high-performance GPS/GNSS module designed for precision positioning applications. Manufactured by Shenzhen Ai-Thinker Technology Co., Ltd., this module supports multiple satellite navigation systems, including GPS, GLONASS, and BeiDou, ensuring reliable and accurate location data. Its low power consumption and small form factor make it ideal for integration into portable devices, IoT applications, and automotive systems.

• IoT Devices: Location tracking for smart devices and wearables.
• Automotive Systems: Navigation and fleet management.
• Drones and Robotics: High-precision positioning for autonomous systems.
• Geolocation Services: Mapping, surveying, and outdoor navigation.
• Asset Tracking: Monitoring the location of valuable goods and equipment.

The GP-02 module has a total of 8 pins. Below is the pinout and description:

1. Power Supply: Connect the VCC pin to a regulated 3.3V power source and the GND pin to ground.
2. UART Communication: Connect the TXD and RXD pins to the corresponding UART pins of your microcontroller or development board (e.g., Arduino UNO).
3. Antenna: Attach an external active antenna to the ANT pin for optimal satellite signal reception.
4. Enable Pin: Pull the EN pin high to activate the module. If unused, connect it to VCC.
5. PPS Signal: Use the PPS pin for precise timing applications if required.

• Antenna Placement: Ensure the external antenna has a clear view of the sky for optimal satellite reception.
• Power Supply: Use a stable and noise-free power source to avoid interference with the module's operation.
• UART Configuration: The default baud rate is 9600 bps. Configure your microcontroller's UART settings accordingly.
• Startup Time: Allow sufficient time for the module to acquire satellite signals, especially during a cold start.

Below is an example of how to interface the GP-02 module with an Arduino UNO and read GPS data:

#include <SoftwareSerial.h>

// Define SoftwareSerial pins for GP-02 communication
SoftwareSerial gpsSerial(10, 11); // RX = Pin 10, TX = Pin 11

void setup() {
  // Initialize serial communication
  Serial.begin(9600); // For debugging via Serial Monitor
  gpsSerial.begin(9600); // For communication with GP-02 module

  Serial.println("GP-02 GPS Module Test");
}

void loop() {
  // Check if data is available from the GPS module
  while (gpsSerial.available()) {
    char c = gpsSerial.read(); // Read one character from the GPS module
    Serial.print(c); // Print the character to the Serial Monitor
  }
}

Note: Ensure the Arduino UNO is powered via USB or an external power source when using the GP-02 module.

1. No GPS Data Output:

   • Cause: Incorrect UART connections or baud rate mismatch.
   • Solution: Verify the TXD and RXD connections and ensure the baud rate is set to 9600 bps.

2. Poor Satellite Signal:

   • Cause: Obstructed antenna placement or interference.
   • Solution: Place the antenna in an open area with a clear view of the sky. Avoid placing it near electronic devices that may cause interference.

3. Module Not Powering On:

   • Cause: Insufficient or unstable power supply.
   • Solution: Ensure the VCC pin is supplied with a stable 3.3V and the GND pin is properly connected.

4. PPS Signal Not Working:

   • Cause: PPS pin not connected or module not locked onto satellites.
   • Solution: Verify the PPS connection and ensure the module has acquired satellite signals.

• Q: Can the GP-02 module operate at 5V?
  A: No, the GP-02 module requires a power supply of 3.0V to 3.6V. Using 5V may damage the module.

• Q: How many satellites does the GP-02 support simultaneously?
  A: The GP-02 can track up to 22 satellites simultaneously, depending on the satellite system and signal conditions.

• Q: Is the GP-02 compatible with NMEA protocol?
  A: Yes, the GP-02 outputs data in standard NMEA format, which is widely supported by GPS software and libraries.

• Q: Can I use the GP-02 indoors?
  A: While the GP-02 may work indoors, satellite signal reception is typically weaker. For best results, use the module outdoors or near a window.

This concludes the documentation for the Ai-Thinker GP-02 Precision GPS/GNSS Module.