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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.