Hi everyone,
I'm trying to get GPS data using an ESP32 and a NEO-6M module. I connected everything as shown in the picture below (please see attachment).
After powering it on and going outside, I wait for a while. Eventually, the LED on the NEO-6M starts blinking, which (as I understand) means it has a GPS fix. However, the OLED display still shows "No Data", and I can't figure out why.
I'm really hoping someone can help me understand what might be going wrong. Any guidance would be greatly appreciated!
Thanks in advance!
#include <Wire.h>
#include <Adafruit_SSD1306.h>
#include <TinyGPS++.h>
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
//On ESP32: GPIO-21(SDA), GPIO-22(SCL)
#define OLED_RESET -1 //Reset pin # (or -1 if sharing Arduino reset pin)
#define SCREEN_ADDRESS 0x3C //See datasheet for Address
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
#define RXD2 16
#define TXD2 17
HardwareSerial neogps(1);
TinyGPSPlus gps;
void setup() {
Serial.begin(115200);
//Begin serial communication Arduino IDE (Serial Monitor)
//Begin serial communication Neo6mGPS
neogps.begin(9600, SERIAL_8N1, RXD2, TXD2);
// SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
if(!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
Serial.println(F("SSD1306 allocation failed"));
for(;;); // Don't proceed, loop forever
}
display.clearDisplay();
display.display();
delay(2000);
}
void loop() {
boolean newData = false;
for (unsigned long start = millis(); millis() - start < 1000;)
{
while (neogps.available())
{
if (gps.encode(neogps.read()))
{
newData = true;
}
}
}
//If newData is true
if(newData == true)
{
newData = false;
Serial.println(gps.satellites.value());
print_speed();
}
else
{
display.clearDisplay();
display.setTextColor(SSD1306_WHITE);
display.setCursor(0, 0);
display.setTextSize(3);
display.print("No Data");
display.display();
}
}
void print_speed()
{
display.clearDisplay();
display.setTextColor(SSD1306_WHITE);
if (gps.location.isValid() == 1)
{
//String gps_speed = String(gps.speed.kmph());
display.setTextSize(1);
display.setCursor(25, 5);
display.print("Lat: ");
display.setCursor(50, 5);
display.print(gps.location.lat(),6);
display.setCursor(25, 20);
display.print("Lng: ");
display.setCursor(50, 20);
display.print(gps.location.lng(),6);
display.setCursor(25, 35);
display.print("Speed: ");
display.setCursor(65, 35);
display.print(gps.speed.kmph());
display.setTextSize(1);
display.setCursor(0, 50);
display.print("SAT:");
display.setCursor(25, 50);
display.print(gps.satellites.value());
display.setTextSize(1);
display.setCursor(70, 50);
display.print("ALT:");
display.setCursor(95, 50);
display.print(gps.altitude.meters(), 0);
display.display();
}
else
{
display.clearDisplay();
display.setTextColor(SSD1306_WHITE);
display.setCursor(0, 0);
display.setTextSize(3);
display.print("No Data");
display.display();
}
}