Month: July 2026

#include <WiFi.h>

const char *ssid = "wifi";
const char *password = "pass";

// GPS UART
HardwareSerial GPS(2); // UART2

// Standard NMEA TCP port
WiFiServer server(10110);

// Allow multiple clients
WiFiClient clients[5];

String line;

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

  // GPS on GPIO21 (RX), GPIO22 (TX)
  GPS.begin(9600, SERIAL_8N1, 21, 22);

  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);

  Serial.print("Connecting");

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println();
  Serial.print("Connected: ");
  Serial.println(WiFi.localIP());

  server.begin();
  server.setNoDelay(true);

  Serial.println("NMEA TCP server started on port 10110");
}

void loop() {

  // Accept new clients
  if (server.hasClient()) {

    for (int i = 0; i < 5; i++) {

      if (!clients[i] || !clients[i].connected()) {

        if (clients[i])
          clients[i].stop();

        clients[i] = server.available();
        clients[i].setNoDelay(true);

        Serial.printf("Client %d connected\n", i);
        break;
      }
    }

    // No room
    WiFiClient reject = server.available();
    reject.stop();
  }

  // Read GPS
  while (GPS.available()) {

    char c = GPS.read();

    // Echo to USB serial
    Serial.write(c);

    line += c;

    if (c == '\n') {

      // Send complete NMEA sentence to all clients
      for (int i = 0; i < 5; i++) {

        if (clients[i] && clients[i].connected()) {

          clients[i].print(line);

          if (clients[i].getWriteError()) {
            clients[i].stop();
          }
        }
      }

      line.clear();

      // Prevent runaway if malformed data
      if (line.length() > 256)
        line.clear();
    }
  }
}

• xgps to view data

apt install gpsd gpsd-clients
nc ESP-IP 10110
#OR
gpsd tcp://192.168.1.150:10110

#lauch

xgps