Has anyone try sending sim808 gps data to firebase using nodemcu??

#include <ESP8266WiFi.h>
#include <FirebaseArduino.h>
#define FIREBASE_HOST "mcuu-xxxx.firebaseio.com"
#define FIREBASE_AUTH "xxxxxxxxxxxxx"
#define WIFI_SSID "xxxxxxx"
#define WIFI_PASSWORD "xxxxxxxxxx"
#include <DFRobot_sim808.h>
#include <SoftwareSerial.h>
#define PIN_TX    4
#define PIN_RX    5
SoftwareSerial mySerial(PIN_TX,PIN_RX);
DFRobot_SIM808 sim808(&mySerial);//Connect RX,TX,PWR,
 
void setup() {
  Serial.begin(9600);
  mySerial.begin(9600);
  // connect to wifi.
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  Serial.print("connecting");
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print(".");
    delay(500);
  }
  Serial.println();
  Serial.print("connected: ");
  Serial.println(WiFi.localIP());
  Firebase.begin(FIREBASE_HOST, FIREBASE_AUTH);
 
  
  while(!sim808.init()) { 
      delay(1000);
      Serial.print("Sim808 init error\r\n");
  }
 
  //************* Turn on the GPS power************
  if( sim808.attachGPS())
      Serial.println("Open the GPS power success");
  else 
      Serial.println("Open the GPS power failure");
  
 
}
 
int n = 0;
 
void loop() {
 
Serial.print("Latgps: ");
Serial.println(sim808.GPSdata.lat, 8);
Serial.print("Longps: ");
Serial.println(sim808.GPSdata.lon, 8);
 
  // set value
  Firebase.setFloat("latitude",sim808.GPSdata.lat);
  // handle error
  if (Firebase.failed()) {
      Serial.print("firebase connection failed");
      Serial.println(Firebase.error());  
      return;
  }
  delay(1000);
  
  // update value
  Firebase.setFloat("longitude", sim808.GPSdata.lon);
  // handle error
  if (Firebase.failed()) {
      Serial.print("firebase connection failed");
      Serial.println(Firebase.error());  
      return;
  }
  delay(1000);
 
  // get value 
  Serial.print("latitudefire: ");
  Serial.println(Firebase.getFloat("latitude"));
  Serial.print("longitudefire: ");
  Serial.println(Firebase.getFloat("longitude"));
  delay(1000);
 
  // set string value
  Firebase.setString("message", "xxxxxxxx");
  // handle error
  if (Firebase.failed()) {
      Serial.print("setting /message failed:");
      Serial.println(Firebase.error());  
      return;
  }
  delay(1000);
 
}
 
 
SERIAL MONITOR:
 
connected: 192.168.1.6
Open the GPS power success
Latgps: 0.00000000
Longps: 0.00000000
latitudefire: 0.00
longitudefire: 0.00
Latgps: 0.00000000
Longps: 0.00000000
latitudefire: 0.00
longitudefire: 0.00
Latgps: 0.00000000
Longps: 0.00000000
latitudefire: 0.00
longitudefire: 0.00