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ESP32 with AI Thinker GP-02 GPS Module

15-07-2025

✅ What is AI Thinker GP-02?

The AI Thinker GP-02 is a GNSS (GPS) module, designed to work with satellite navigation systems to provide:

Real-time location data (latitude, longitude)
Speed
Altitude
Time (UTC)
and more

It supports multiple satellite constellations:

GPS (USA)
GLONASS (Russia)
Galileo (EU)
BeiDou (China)

It communicates using UART (Serial) and is ideal for ESP32, Arduino, STM32, etc.

🧩 Features of GP-02 (AI Thinker GNSS Module):

Feature	Detail
Communication	UART (TX/RX)
Protocol	NMEA0183
Baud Rate	9600 bps (default)
Voltage	3.3V logic and power
Satellite support	GPS, GLONASS, BDS, Galileo
Accuracy	~2.5m
Update Rate	1Hz (default), can be increased

📌 Pinout of AI Thinker GP-02:

GP-02 Pin	Function
VCC	3.3V
GND	Ground
TX	Serial TX (data from GPS to ESP32)
RX	Serial RX (data from ESP32 to GPS)

🧠 Note: You only need TX → RX and VCC/GND for location data reading.

🔌 Connecting GP-02 to ESP32

Use SoftwareSerial alternative like HardwareSerial in ESP32:

GP-02	ESP32
VCC	3.3V
GND	GND
TX	GPIO 16 (RX of ESP32)
RX	GPIO 17 (TX of ESP32)

You can use any available hardware UART (ESP32 has 3 UARTs: Serial0, Serial1, Serial2)

📄 Arduino Code Example for ESP32 + GP-02

We’ll use the TinyGPSPlus library to parse GPS data:

🛠️ Step 1: Install Library

Go to Arduino IDE:

Sketch > Include Library > Manage Libraries
Install TinyGPSPlus

📌 Use Cases for GP-02

Project	Description
📍 GPS Tracker	Real-time location tracking via GSM/LoRa/WiFi
🚴 Bike Speedometer	Get speed, distance, and log path
🛰️ IoT Location Logger	Store location logs in SD card or send to server
🚗 Geo-fencing	Trigger actions based on location boundaries
🧭 Navigation Device	Portable handheld GPS tool with OLED display

🧠 Pro Tips

Must be outdoors or near a window for best signal.
Cold start may take 30–60 seconds for the first lock.
Use a small GPS patch antenna for better reception if available.

HOW TO OPERATE

#include <TinyGPS++.h>

#include <HardwareSerial.h>

TinyGPSPlus gps;

HardwareSerial GPS(1); // UART1

#define RXD2 16 // Connect to GP-02 TX

#define TXD2 17 // Connect to GP-02 RX

void setup() {

Serial.begin(115200); // Debug Serial Monitor

GPS.begin(9600, SERIAL_8N1, RXD2, TXD2); // Start GPS UART

Serial.println("GP-02 GPS Location to Google Maps");

}

void loop() {

while (GPS.available()) {

gps.encode(GPS.read());

if (gps.location.isUpdated()) {

float lat = gps.location.lat();

float lon = gps.location.lng();

Serial.println("Location Updated:");

Serial.print("Latitude: "); Serial.println(lat, 6);

Serial.print("Longitude: "); Serial.println(lon, 6);

// Google Maps URL

Serial.print("Google Maps: ");

Serial.print("https://www.google.com/maps/place/");

Serial.print(lat, 6);

Serial.print(",");

Serial.println(lon, 6);

Serial.println("-----------------------------");

delay(5000); // Wait before printing next update

}

}

Serial.println("INVALID LOCATION");

}

ESP32 with AI Thinker GP-02 GPS Module

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