Nodemcu gps without gps module error

Projects Programming
3 
#include <ESP8266HTTPClient.h>
#include <ArduinoJson.h>
#include "ESP8266WiFi.h"

char myssid[] = "OnePlus n";     // your network SSID (name)
char mypass[] = "xxx";  // your network password


//Credentials for Google GeoLocation API...
const char* Host = "www.googleapis.com";
String thisPage = "/geolocation/v1/geolocate?key=";
String key = "AIzaSyA3KpvCxxxxxxxXO6DlV-OU21Es";

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("scan done");
  if (n == 0)
    Serial.println("no networks found");
  else {
    Serial.print(n);
    Serial.println(" networks found...");

    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: ");
  Serial.println("https://" + (String)Host + thisPage + "AIzaSyCYNXIYINPmTNIdusMjJloS4_BXSOff1_g");
  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);
}