Ciao a tutti ho dei problemi ad utilizzare il modulo GPS (GY-NEO6MV2 ) combinato con il monitor OLED 128x32 (0.91" IIC I2C SPI128x32), vorrei visualizzare le coordinate gps sul monitor:
#include <SoftwareSerial.h>
#include <TinyGPS.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#define OLED_RESET 4
Adafruit_SSD1306 display(OLED_RESET);
/* This sample code demonstrates the normal use of a TinyGPS object.
It requires the use of SoftwareSerial, and assumes that you have a
4800-baud serial GPS device hooked up on pins 4(rx) and 3(tx).
*/
TinyGPS gps;
SoftwareSerial ss(4, 3);
void setup()
{
// by default, we'll generate the high voltage from the 3.3v line internally! (neat!)
display.begin(SSD1306_SWITCHCAPVCC, 0x3C); // initialize with the I2C addr 0x3C (for the 128x32)
// init done
Serial.begin(115200);
ss.begin(9600);
Serial.print("Simple TinyGPS library v. "); Serial.println(TinyGPS::library_version());
Serial.println("by Mikal Hart");
Serial.println();
}
void loop()
{
bool newData = false;
unsigned long chars;
unsigned short sentences, failed;
// For one second we parse GPS data and report some key values
for (unsigned long start = millis(); millis() - start < 1000;)
{
while (ss.available())
{
char c = ss.read();
// Serial.write(c); // uncomment this line if you want to see the GPS data flowing
if (gps.encode(c)) // Did a new valid sentence come in?
newData = true;
}
}
if (newData)
{
float flat, flon;
unsigned long age;
gps.f_get_position(&flat, &flon, &age);
Serial.print("LAT=");
Serial.print(flat == TinyGPS::GPS_INVALID_F_ANGLE ? 0.0 : flat, 6);
Serial.print(" LON=");
Serial.print(flon == TinyGPS::GPS_INVALID_F_ANGLE ? 0.0 : flon, 6);
Serial.print(" SAT=");
Serial.print(gps.satellites() == TinyGPS::GPS_INVALID_SATELLITES ? 0 : gps.satellites());
Serial.print(" PREC=");
Serial.print(gps.hdop() == TinyGPS::GPS_INVALID_HDOP ? 0 : gps.hdop());
display.clearDisplay(); // stampa su display
display.setTextColor(WHITE);
display.setTextSize(1);
display.setCursor(0,0);
display.print("Lat: ");
display.print(flat == TinyGPS::GPS_INVALID_F_ANGLE ? 0.0 : flat, 6);
display.print(" Lon: ");
display.print(flon == TinyGPS::GPS_INVALID_F_ANGLE ? 0.0 : flon, 6);
display.display();
}
gps.stats(&chars, &sentences, &failed);
Serial.print(" CHARS=");
Serial.print(chars);
Serial.print(" SENTENCES=");
Serial.print(sentences);
Serial.print(" CSUM ERR=");
Serial.println(failed);
if (chars == 0)
Serial.println("** No characters received from GPS: check wiring **");
}
in particolare ho fatto alcune prove, togliendo questa riga il monitor seriale mi dà le coordinate giuste ma l'OLED non funziona, lasciandola l'OLED funziona ma non riceve le coordinate perchè restano a 0...
display.begin(SSD1306_SWITCHCAPVCC, 0x3C); // initialize with the I2C addr 0x3C (for the 128x32)
ho provato a cercare nelle librerie ma non son riuscito a capire cosa c'è che non va 
qualcuno può aiutarmi?
Grazie