How to Use ATGM336H: Examples, Pinouts, and Specs

The ATGM336H is a high-performance GPS+BDS dual-mode module manufactured by Teyleten Robot. It is designed to provide accurate positioning data with minimal power consumption. The module features a built-in antenna and supports multiple communication interfaces, making it versatile for a wide range of applications. Its compact design and reliable performance make it ideal for use in robotics, drones, automotive systems, and other GPS-based navigation solutions.

• Robotics and autonomous systems
• Drones and UAVs
• Automotive navigation and tracking
• IoT devices requiring location services
• Personal navigation devices

1. Power Supply: Connect the VCC pin to a 3.3V or 5.0V power source and the GND pin to ground.
2. Communication Interface:
   • For UART communication, connect the TXD and RXD pins to the corresponding RX and TX pins of your microcontroller.
   • For I2C communication, connect the SDA and SCL pins to the I2C data and clock lines of your microcontroller.
3. Antenna: The module has a built-in antenna, so no external antenna is required for most applications.
4. Pulse Per Second (PPS): Use the PPS pin if precise timing signals are needed for your application.

• Ensure the power supply voltage is within the specified range (3.3V - 5.0V) to avoid damaging the module.
• Place the module in an open area with minimal obstructions for optimal satellite signal reception.
• Use decoupling capacitors near the VCC pin to reduce noise and improve stability.
• If using UART, ensure the baud rate of your microcontroller matches the module's default baud rate (9600 bps) or configure it accordingly.

Below is an example of how to connect and use the ATGM336H module with an Arduino UNO via UART.

#include <SoftwareSerial.h>

// Define RX and TX pins for SoftwareSerial
SoftwareSerial gpsSerial(10, 11); // RX = Pin 10, TX = Pin 11

void setup() {
  Serial.begin(9600); // Initialize Serial Monitor at 9600 bps
  gpsSerial.begin(9600); // Initialize GPS module at 9600 bps

  Serial.println("ATGM336H GPS Module Test");
}

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

• The SoftwareSerial library is used to create a secondary serial port for communication with the GPS module.
• Ensure the Arduino UNO's Serial Monitor is set to 9600 baud to view the GPS data.

1. No Data Output from the Module

   • Cause: Incorrect wiring or baud rate mismatch.
   • Solution: Double-check the connections and ensure the baud rate is set to 9600 bps.

2. Poor GPS Signal Reception

   • Cause: Obstructions or interference in the environment.
   • Solution: Place the module in an open area with a clear view of the sky.

3. Module Not Powering On

   • Cause: Insufficient or incorrect power supply.
   • Solution: Verify the power supply voltage is within the 3.3V - 5.0V range.

4. Data Corruption in Output

   • Cause: Noise or interference on the communication lines.
   • Solution: Use shorter wires and add pull-up resistors for I2C lines if necessary.

Q: Can the ATGM336H be used indoors?
A: While the module can operate indoors, GPS signal reception may be weak or unavailable. For best results, use the module in an open area.

Q: How do I change the baud rate of the module?
A: The baud rate can be configured by sending specific commands to the module. Refer to the manufacturer's datasheet for details.

Q: Does the module support external antennas?
A: The ATGM336H has a built-in antenna, but some variants may support external antennas. Check the specific model's datasheet for more information.

Q: What is the purpose of the PPS pin?
A: The PPS (Pulse Per Second) pin provides a precise timing signal that can be used for synchronization in time-sensitive applications.