How to Use Adafruit PA1010D Mini GPS Module: Examples, Pinouts, and Specs

The Adafruit PA1010D Mini GPS Module is a compact, high-performance GPS receiver with an integrated antenna and built-in data logging capabilities. It utilizes the MTK3333 chipset capable of tracking up to 33 satellites on 99 channels. This module is ideal for a wide range of applications including asset tracking, navigation, and time synchronization.

• Personal and asset tracking devices
• Data logging and geotagging
• Time synchronization for systems
• Navigation aids for drones and remote-controlled vehicles
• Location-based projects and services

• Chipset: MediaTek MT3333
• Channels: 99 tracking, 33 acquisition
• Update Rate: Up to 10 Hz
• Sensitivity: -165 dBm
• Horizontal Position Accuracy: < 3m (50% CEP)
• Operating Voltage: 3.0V to 5.5V
• Operating Current: 25 mA tracking, 20 mA current draw during navigation
• Operating Temperature: -40°C to 85°C

1. Power Supply: Connect the VIN pin to a 3.0V to 5.5V power source and the GND pin to the ground.
2. Serial Communication: Connect the TX pin of the GPS module to the RX pin of your microcontroller and the RX pin to the TX pin.
3. PPS Signal: The PPS pin can be connected to an interrupt pin on your microcontroller if you require precise timing.
4. Enable Pin: The EN pin can be left unconnected for normal operation or connected to a digital pin on your microcontroller to control the power state of the module.

• Ensure that the GPS module has a clear view of the sky for optimal performance.
• Avoid placing the module near devices that emit RF noise, as this can interfere with signal reception.
• Use a level shifter if you are interfacing with a microcontroller that operates at a different logic level than the GPS module.
• For data logging, make sure to have a battery connected to the VBAT pin to keep the real-time clock running.

#include <SoftwareSerial.h>

// Define the RX and TX pins connected to the GPS module
#define GPS_RX_PIN 3
#define GPS_TX_PIN 4

// Set up the software serial port
SoftwareSerial gpsSerial(GPS_RX_PIN, GPS_TX_PIN);

void setup() {
  // Start the serial communication with the host computer
  Serial.begin(9600);
  // Start the serial communication with the GPS module
  gpsSerial.begin(9600);
}

void loop() {
  // Check if new data is available from the GPS module
  if (gpsSerial.available()) {
    // Read the data and print it to the host computer's serial monitor
    Serial.write(gpsSerial.read());
  }
}

• No GPS Fix: Ensure the module has a clear view of the sky and that it is not obstructed by buildings or other structures.
• Garbled Data: Check the baud rate settings and wiring connections between the GPS module and your microcontroller.
• Module Not Powering Up: Verify that the power supply is within the specified voltage range and that the connections are secure.

• No GPS Fix: If you're indoors or in a dense urban area, try moving to a location with a clearer view of the sky.
• Garbled Data: Double-check the serial communication baud rate and ensure it matches the default rate of the GPS module.
• Module Not Powering Up: Check the power supply with a multimeter and inspect the solder joints for any cold solder or breaks.

Q: How long does it take for the PA1010D to get a GPS fix? A: The time to first fix (TTFF) can vary, but typically it takes about 30 seconds with a clear sky view.

Q: Can I use the PA1010D with a 3.3V microcontroller? A: Yes, the PA1010D can be powered with 3.3V and is compatible with 3.3V logic levels.

Q: What is the purpose of the PPS pin? A: The PPS pin outputs a pulse per second, which can be used for precise timing applications.

Q: How can I improve the GPS signal reception? A: Ensure the module's antenna has an unobstructed view of the sky and is placed away from electronic interference sources.