GPS Module (NEO-6M/7M)

Wiring

GPS Pin	ESP32 Pin
VCC	3.3V
GND	GND
TX	GPIO16 (RX2)
RX	GPIO17 (TX2)

Code

Install TinyGPS++ library.

#include <TinyGPS++.h>
TinyGPSPlus gps;
void setup() { Serial.begin(115200); Serial2.begin(9600); }
void loop() {
  while (Serial2.available()) {
    if (gps.encode(Serial2.read())) {
      if (gps.location.isValid()) {
        Serial.print(gps.location.lat(), 6);
        Serial.print(",");
        Serial.println(gps.location.lng(), 6);
      }
    }
  }
}

Specifications

• NEO-6M: GPS only, 2.5m accuracy
• NEO-7M: GPS + GLONASS, faster fix
• NEO-8M: GPS + GLONASS + Galileo + BeiDou

Troubleshooting

• No fix — First fix takes 5-15 min outdoors. Indoor = no signal.
• No serial data — Check baud rate (default 9600). Check TX/RX not swapped.
• ESP32 GPS not working — See GPS No Fix Guide