Esp is not connecting to the firebase. This is my project code i am not able to receive the data in the firebase database. what my be the error.

[ghost]

#include <FirebaseArduino.h>
#include <ESP8266WiFi.h>
#define FIREBASE_HOST "arduinotest-f6d5e.firebaseio.com"
#define FIREBASE_AUTH "u65MmIKJqyvHoUmG6hMMK0KoCuMYl7ZRF06Y4JFG"
#define WIFI_SSID "kick"
#define WIFI_PASSWORD "12345678"
float fire;
void setup() {
Serial.begin(9600);
pinMode(D5, OUTPUT);
pinMode(D6, OUTPUT);
pinMode(A0, INPUT);
// 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);
Firebase.set("LED_STATUS", 0);
}
int n = 0;
void loop() {
int analogValue = analogRead(A0);
float millivolts = (analogValue/1024.0) * 3300; //3300 is the voltage provided by NodeMCU
float celsius = millivolts/10;

Serial.print("in DegreeC= ");
Serial.println(celsius);
delay(1);
if(celsius>35){
digitalWrite(D6,HIGH);
Firebase.setInt("fire_sensor_status",1);
}
n = Firebase.getInt("LED_STATUS");
// handle error
if (n==1) {
Serial.println("LED ON");
digitalWrite(D5,HIGH);
return;
delay(10);
}
else {
Serial.println("LED OFF");
digitalWrite(D5,LOW);
digitalWrite(D6,LOW);
Firebase.setInt("fire_sensor_status",0);
return;
}
}

[Arafa-microsys]

Your problem in Fingerprint, the fingerprint of firebase is changing every short period, So the library doesn't work and you need to change fingerprint with a new one.
I advise you to use the best version of this Library and the new one not based on Fingerprint so if changed any time you will not worry about that.
https://github.com/mobizt/Firebase-ESP8266
but if you want to use this old library you can follow the instructions here to change fingerprint to a new one #439.