在 YouTube 上观看

Get GPS Location from U-blox Neo-6 and Neo-7 GPS Modules with Arduino

This project demonstrates how to interface a U-blox Neo-6M or Neo-7M GPS module with an Arduino to obtain location data (latitude and longitude). These affordable modules, readily available online, provide a simple way to add GPS functionality to your projects. The distinct blue LED on the Neo-7M (in video at 02:53) signals GPS fix, a handy feature for confirming signal acquisition.

Here are some project ideas using a GPS module and Arduino:

• GPS Tracker: Log location data and display it on a map.
• Geocaching Tool: Navigate to specific coordinates.
• Automated Vehicle Navigation: Guide a robot or drone.
• Weather Station: Add location data to weather readings.
• Wildlife Tracking: Monitor animal movements.

Hardware/Components

• Arduino Uno (or compatible board)
• U-blox Neo-6M or Neo-7M GPS module
• Jumper wires
• USB cable
• (Optional) External antenna and SMA connector

Wiring Guide

The wiring is straightforward (in video at 10:39):

• GPS VCC to Arduino 3.3V
• GPS GND to Arduino GND
• GPS TX to Arduino pin 3 (defined as RX in code)
• GPS RX to Arduino pin 4 (defined as TX in code)

Remember, TX connects to RX and vice-versa (in video at 11:10). The video also shows how to use simple jumper wires for connections (in video at 10:24).

Code Explanation

This project uses the TinyGPS++ library. Download and install it through the Arduino IDE's library manager. The essential code adjustments are the software serial pin definitions and baud rate (in video at 07:00):

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

static const int RXPin = 3, TXPin = 4;
static const uint32_t GPSBaud = 9600; // Default for U-blox modules

The RXPin and TXPin variables define the Arduino pins connected to the GPS module. The default baud rate for the U-blox modules is 9600. The core of the code lies in reading the serial data from the GPS and parsing it using the TinyGPS++ library (in video at 08:03):

// The TinyGPS++ object
TinyGPSPlus gps;

// The serial connection to the GPS device
SoftwareSerial ss(RXPin, TXPin);

// ... (inside loop function) ...
while (ss.available() > 0)
  if (gps.encode(ss.read()))
    displayInfo();

The displayInfo() function then extracts and prints the latitude and longitude whenever a valid GPS fix is obtained (in video at 09:07):

void displayInfo()
{
  // ... other code ...

  if (gps.location.isValid())
  {
    Serial.print(gps.location.lat(), 6); // Latitude with 6 decimal places
    Serial.print(F(","));
    Serial.print(gps.location.lng(), 6); // Longitude with 6 decimal places
  }
  // ... other code ...
}

Live Project/Demonstration

The video (in video at 12:29) demonstrates the project in action, showing the initial "INVALID" output when no GPS signal is present and then displaying valid coordinates once a fix is acquired. The blinking blue LED on the Neo-7M provides visual confirmation of the GPS signal (in video at 13:49).

Chapters

• [00:00] Introduction and Project Overview
• [00:32] GPS Module Variations (Neo-6M and Neo-7M)
• [04:30] Wiring the GPS Module to Arduino
• [06:12] Code Explanation and TinyGPS++ Library
• [10:07] Detailed Wiring Explanation and TX/RX Principles
• [12:29] Live Demonstration and Signal Acquisition

#include <TinyGPS++.h>
#include <SoftwareSerial.h>
/*
 * Original library source: https://github.com/mikalhart/TinyGPSPlus
   This sample sketch demonstrates the normal use of a TinyGPSPlus object.
   It requires the use of SoftwareSerial, and assumes that you have a
   4800-baud serial GPS device hooked up on pins 3(rx) and 4(tx).

   Modified by Ahmad Shamshiri for Robojax.com 
   on September 09, 2018 at 20:20 in Ajax, Ontario, Canada
   Watch video instructions for this code:https://youtu.be/hbRpr1HbDf8
*/
static const int RXPin = 3, TXPin = 4;
static const uint32_t GPSBaud = 9600;

// The TinyGPS++ object
TinyGPSPlus gps;

// The serial connection to the GPS device
SoftwareSerial ss(RXPin, TXPin);

void setup()
{
  Serial.begin(115200);
  ss.begin(GPSBaud);

  Serial.println(F("Robojax GPS Demo"));
  Serial.println(F("A simple demonstration of TinyGPS++ with an attached GPS module"));
  Serial.print(F("Testing TinyGPS++ library v. ")); Serial.println(TinyGPSPlus::libraryVersion());
  Serial.println(F("by Mikal Hart"));
  Serial.println();
}

void loop()
{

  // This sketch displays information every time a new sentence is correctly encoded.
  while (ss.available() > 0)
    if (gps.encode(ss.read()))
      displayInfo();

  if (millis() > 5000 && gps.charsProcessed() < 10)
  {
    Serial.println(F("No GPS detected: check wiring."));
    while(true);
  }
 delay(100);
}

void displayInfo()
{
  Serial.print(F("Location: ")); 
  if (gps.location.isValid())
  {
    Serial.print(gps.location.lat(), 6);
    Serial.print(F(","));
    Serial.print(gps.location.lng(), 6);
  }
  else
  {
    Serial.print(F("INVALID"));
  }

  Serial.print(F("  Date/Time: "));
  if (gps.date.isValid())
  {
    Serial.print(gps.date.month());
    Serial.print(F("/"));
    Serial.print(gps.date.day());
    Serial.print(F("/"));
    Serial.print(gps.date.year());
  }
  else
  {
    Serial.print(F("INVALID"));
  }

  Serial.print(F(" "));
  if (gps.time.isValid())
  {
    if (gps.time.hour() < 10) Serial.print(F("0"));
    Serial.print(gps.time.hour());
    Serial.print(F(":"));
    if (gps.time.minute() < 10) Serial.print(F("0"));
    Serial.print(gps.time.minute());
    Serial.print(F(":"));
    if (gps.time.second() < 10) Serial.print(F("0"));
    Serial.print(gps.time.second());
    Serial.print(F("."));
    if (gps.time.centisecond() < 10) Serial.print(F("0"));
    Serial.print(gps.time.centisecond());
  }
  else
  {
    Serial.print(F("INVALID"));
  }

  Serial.println();
}