It’s my Summer Internship Project. I really surprise when i hear we can trace location any device without using GPS module only using NodeMCU. Through this we can trace any device .You also surprise how can we trace device using only WiFi . Here are the sort description to understand it.

· It’s Scan your nearly all WiFi .
· Send this device location to Google using Google API
· According to this It’s locate your device location
· You have strong network connection for this Project.

Step 1: Parts & Tool

Parts

NodeMCU(ESP8266 1.0 12E)
USB Cable

Tools

Arduino IDE with NodeMcu 1.0 12E Board

Google API

Step 2: Find Google API

Open Your Browser and type : console.developer.google.com
Create a new project
After Create a new Project click on credential
Click on API Key
Your API Key Has been generated
- For Easily understanding see the following picture |>

Step 3: Setup NodeMCu on Arduino IDE

Download Arduino IDE from thefollowing Link :- https://www. Main/Software arduino.cc/en/
Add Node MCu board on Arduino IDE
For uploading code on NodeMCU youhave to add the NodeMCu board on ARDUINO IDE.
- GO to file & Preference in Arduino IDE
- And in Additional Board managersection copy the following link
- http://arduino.esp8266.com/stable/package_esp8266c...
- and click Ok
- The board is downloaded
- Go to the tools and board and select NodeMCU 1.0 12E
- See the avobe picture for easily understanding

Step 4: Download ArduinoJson Library

Go to the
Sketch--> Include Library--> Manage Library
Type Arduino Json in search box
Download the latest version of ArduinoJson library
after downloading library click close
Add library from
Sketch-->includeLibrary-->ArduinoJson

Step 5: Program

Upload the following program on NodeMCU board. and see your device(NodeMCU 1.0 12E board) location on Serial monitor.

#include<ArduinoJson.h>
#include <ESP8266HTTPClient.h>
#include <ESP8266WiFi.h>
char myssid[] = "Your SSID";         // your network SSID (name)
char mypass[] = "Your Password";          // your network password
//Credentials for Google GeoLocation API...
const char* Host = "www.googleapis.com";
String thisPage = "/geolocation/v1/geolocate?key=";
// --- Get a google maps ap key here :
https://developers.google.com/maps/documentation/geolocation/intro
String key = "Your Google API key ";//Find from step2
Instruction
int status = WL_IDLE_STATUS;
String jsonString = "{\n";
double latitude    = 0.0;
double longitude   = 0.0;
double accuracy    = 0.0;
int more_text = 1; // set to 1 for more debug output
void setup()   {
  Serial.begin(9600);
 
Serial.println("Start");
  // Set WiFi to station mode and
disconnect from an AP if it was previously connected
  WiFi.mode(WIFI_STA);
  WiFi.disconnect();
  delay(100);
  Serial.println("Setup
done");
  // We start by connecting to a
WiFi network
  Serial.print("Connecting to
");
  Serial.println(myssid);
  WiFi.begin(myssid, mypass);
  while (WiFi.status() !=WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println(".");
}
void loop() {
  char bssid[6];
  DynamicJsonBuffer jsonBuffer;
  Serial.println("scan start");
  // WiFi.scanNetworks will return
the number of networks found
  int n = WiFi.scanNetworks();
  Serial.println("scandone");
  if (n == 0)
    Serial.println("no networks found");
  else
  {
    Serial.print(n);
    Serial.println(" networksfound...");
    if (more_text) {
      // Print out the formatted json...
     
Serial.println("{");
      Serial.println("\"homeMobileCountryCode\":234,");  // this is a real UK MCC
     Serial.println("\"homeMobileNetworkCode\":27,");   // and a real UK MNC
     
Serial.println("\"radioType\":\"gsm\",");          //for gsm
     
Serial.println("\"carrier\":\"Vodafone\",");       //associated with Vodafone
     
Serial.println("\"cellTowers\": [");                // I'm not reporting any cell towers
     
Serial.println("],");
     
Serial.println("\"wifiAccessPoints\": [");
      for (int i = 0; i < n;
++i)
      {
       
Serial.println("{");
       
Serial.print("\"macAddress\" : \"");
       
Serial.print(WiFi.BSSIDstr(i));
       
Serial.println("\",");
       
Serial.print("\"signalStrength\": ");
       
Serial.println(WiFi.RSSI(i));
        if (i < n - 1)
        {
         
Serial.println("},");
        }
        else
        {
         
Serial.println("}");
        }
      }
     
Serial.println("]");
     
Serial.println("}");
    }
    Serial.println(" ");
  }
  // now build the jsonString...
  jsonString = "{\n";
  jsonString +="\"homeMobileCountryCode\": 234,\n"; // this is a real UK MCC
  jsonString +="\"homeMobileNetworkCode\": 27,\n";  // and a real UK MNC
  jsonString +="\"radioType\": \"gsm\",\n";         // for gsm
  jsonString +="\"carrier\": \"Vodafone\",\n";      // associated with Vodafone
  jsonString +="\"wifiAccessPoints\": [\n";
  for (int j = 0; j < n; ++j)
  {
    jsonString += "{\n";
    jsonString +="\"macAddress\" : \"";
    jsonString +=(WiFi.BSSIDstr(j));
    jsonString +="\",\n";
    jsonString +="\"signalStrength\": ";
    jsonString += WiFi.RSSI(j);
    jsonString += "\n";
    if (j < n - 1)
    {
      jsonString +="},\n";
    }
    else
    {
      jsonString +="}\n";
    }
  }
  jsonString += ("]\n");
  jsonString += ("}\n");
 
//--------------------------------------------------------------------
  Serial.println("");
  WiFiClientSecure client;
  //Connect to the client and make the api call
  Serial.print("Requesting URL: ");
  // ---- Get Google Maps Api Key here, Link: https://developers.google.com/maps/documentation/geolocation/intro
 
Serial.println("https://" + (String)Host + thisPage +"PUT-YOUR-GOOGLE-MAPS-API-KEY-HERE");
  Serial.println(" ");
  if (client.connect(Host, 443)) {
    Serial.println("Connected");
    client.println("POST" + thisPage + key + " HTTP/1.1");
    client.println("Host:" + (String)Host);
   client.println("Connection: close");
   client.println("Content-Type: application/json");
   client.println("User-Agent: Arduino/1.0");
   client.print("Content-Length: ");
   client.println(jsonString.length());
    client.println();
    client.print(jsonString);
    delay(500);
  }
  //Read and parse all the lines of
the reply from server
  while (client.available()) {
    String line =client.readStringUntil('\r');
    if (more_text) {
      Serial.print(line);
    }
    JsonObject& root =jsonBuffer.parseObject(line);
    if (root.success()) {
      latitude    =root["location"]["lat"];
      longitude   =root["location"]["lng"];
      accuracy   = root["accuracy"];
    }
  }
  Serial.println("closing connection");
  Serial.println();
  client.stop();
  Serial.print("Latitude =");
  Serial.println(latitude, 6);
  Serial.print("Longitude =");
  Serial.println(longitude, 6);
  Serial.print("Accuracy =");
  Serial.println(accuracy);
  delay(10000);
  Serial.println();
 
Serial.println("Restarting...");
  Serial.println();
  delay(2000);
}