Gps tracker sim800l gps neo7m arduino nano

[panthe5on15150]

i want to build gps tracker when you sned an sms containing 'location' to the gsm module it sends back the latitude and longtitude this is the code :

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

SoftwareSerial sim(10, 11); // SIM800L RX, TX pins
SoftwareSerial ss(3, 4); // GPS NEO-7M RX, TX pins
TinyGPSPlus gps;

void setup() {
    delay(7000); // Delay for 7 seconds to make sure the modules get the signal
    Serial.begin(9600);
    sim.begin(9600);
    ss.begin(9600); // Start the software serial for GPS

    // Set SMS to text mode and configure for automatic notification
    sim.println("AT+CMGF=1"); // Set SMS to text mode
    delay(1000);
    sim.println("AT+CNMI=1,2,0,0,0"); // New SMS Message Indications
    delay(1000);

    Serial.println("System Initialized. Ready to receive SMS and respond with GPS location.");
}

void loop() {
    // Automatically read new SMS messages as they arrive
    if (sim.available() > 0) {
        String smsText = sim.readString();
        Serial.println("Received SMS:");
        Serial.println(smsText); // Display received SMS message

        // Check if the SMS contains the keyword 'location'
        if (smsText.indexOf("location") != -1) {
            sendGPSLocation(); // Respond with GPS location
        }
    }

    // Process GPS data
    if (ss.available() > 0) {
        if (gps.encode(ss.read())) {
            // Optionally, display GPS data on Serial for debugging
            if (gps.location.isValid()) {
                Serial.print("Valid GPS Data: Lat = ");
                Serial.print(gps.location.lat(), 6);
                Serial.print(", Lon = ");
                Serial.println(gps.location.lng(), 6);
            }
        }
    }
}

void sendGPSLocation() {
    // Check if we have valid GPS data
    if (gps.location.isValid()) {
        String lat = String(gps.location.lat(), 6);
        String lng = String(gps.location.lng(), 6);
        String message = "Lat: " + lat + ", Long: " + lng;

        Serial.println("Sending GPS Location: " + message);
        sim.print("AT+CMGS=\"");
        sim.print("+216xxxxxxxx"); // Replace with the sender's number or a predefined number
        sim.println("\"");
        delay(1000);
        sim.println(message); // GPS coordinates
        delay(100);
        sim.write(26); // ASCII code of CTRL+Z to send the SMS
        delay(1000);
    } else {
        Serial.println("GPS data not valid, cannot send location.");
    }
}

d11---rxsim
d10---txsim
d4---rxgps
d3---txgps
gndsim---gndarduino---(-)battery