LC76G GPS Module Library

A simple library for interfacing with the LC76G GPS module. This library provides basic functionality for configuring the LC76G GPS module using the Arduino framework.

Features

• Configurable update rates (100ms to 1s)
• Adjustable baud rates (4800 to 115200)
• Support for different startup modes (hot, warm, cold start)
• Checksum calculation and verification
• Simple serial interface

Refer to the LC76G chip GNSS protocol for more information URL: https://files.waveshare.com/upload/0/06/Quectel_LC26G%26LC76G%26LC86G_GNSS_Protocol_Specification_V1.0.0_Preliminary.pdf

Installation

PlatformIO

1. Open your project
2. Add the following to your platformio.ini:

lib_deps =
    https://github.com/walloutlet/LC76G.git
    mikalhart/TinyGPSPlus@^1.1.0

Feel free to use the TinyGPS library of your liking.

Manual Installation

1. Download this repository
2. Extract into your libraries folder

Usage

#include <LC76G.h>
#include <TinyGPS++.>

// Initialize the LC76G GPS hardware
LC76G lc76g(&Serial2);

// Initialize GPS object
TinyGPSPlus gps;

void setup() {
    // Initialize GPS on pins 16(RX) and 17(TX) at 115200 baud
    lc76g.begin(16, SERIAL_8N1, 17, 115200);
    
    // Set update rate to 1Hz (1000ms)
    lc76g.setUpdateRate(1000);
}

void loop() {
    // Process GPS data
    while (Serial2.available() > 0) {
      gps.encode(Serial2.read());
    }

    // Code to process GPS data
}

Usage example assumes you are using the default Serial2 port on ESP32 chip.

Tested using Waveshare LC76G GNSS Module

Product URL: https://www.waveshare.com/lc76g-gnss-module.htm

Wiki URL: https://www.waveshare.com/wiki/LC76G_GNSS_Module

Configuration Options

Update Rates

• 100ms (10Hz) - Set value: 100
• 200ms (5Hz) - Set value: 200
• 300ms (3.33Hz) - Set value: 300
• 400ms (2.5Hz) - Set value: 400
• 500ms (2Hz) - Set value: 500
• 600ms (1.67Hz) - Set value: 600
• 700ms (1.43Hz) - Set value: 700
• 800ms (1.25Hz) - Set value: 800
• 900ms (1.11Hz) - Set value: 900
• 1000ms (1Hz) - Set value: 1000

Baud Rates

• 4800 - Set value: 4800
• 9600 - Set value: 9600
• 19200 - Set value: 19200
• 38400 - Set value: 38400
• 57600 - Set value: 57600
• 115200 - Set value: 115200

Start Types

• 1 (Hot) - Set value: 1
• 2 (Warm) - Set value: 2
• 3 (Cold) - Set value: 3

License

This library is licensed under the MIT License. See the LICENSE file for details.