Introduction: Esp8266 Firebase Connection

To start with this project, You need the following components:

  • esp8266(NodeMcu v3 Lua)
  • google account (firebase)

You can buy a esp8266 from here:

Step 1: Setting Up Arduino IDE, Install Esp8266 Board:

Install esp8266 Board:

Open Arduino IDE > File > Preferences > additional Boards Manager URLs > "> OK

Tools > Board: > Boards Manager > esp8266 > install

Step 2: Setting Up Arduino IDE, Install Arduino Json Library:

Install Arduino json library:

Install version 5.13.1

Watch install video HERE

Step 3: Setting Up Arduino IDE, ​Install Firebase Library:

Install Firebase library:

Download latest stable build HERE > unzip in "Documents\Arduino\libraries"

NOTE, There is a bug in "v0.3 Bi-directional streaming support" > update fingerprint CLICK HERE FOR INFO

Step 4: Firebase, Create Project:

Create Firebase Project:

Go To ""

Step 5: Firebase, Project Rules:

Project rules:

Database(Realtime Database) > rules

/* Visit to learn more about security rules. */ "rules": { ".read": true, ".write": true } }

Step 6: Firebase, Realtime Database Data:

Realtime Database data:

Database(Realtime Database) > Data

Add: "LED1" > " "0" "

Step 7: Code:

#include <ESP8266WiFi.h>

#include <FirebaseArduino.h>


int LED1 = 4;

void setup() { Serial.begin(115200);

pinMode(LED1, OUTPUT);

delay(2000); Serial.println('\n'); wifiConnect();


delay(10); }

void loop() { Serial.print(Firebase.getString("LED1") + "\n");

analogWrite(LED1, Firebase.getString("LED1").toInt()); delay(10);

if(WiFi.status() != WL_CONNECTED) { wifiConnect(); } delay(10);


void wifiConnect() { WiFi.begin(WIFI_SSID, WIFI_PASSWORD); // Connect to the network Serial.print("Connecting to "); Serial.print(WIFI_SSID); Serial.println(" ...");

int teller = 0; while (WiFi.status() != WL_CONNECTED) { // Wait for the Wi-Fi to connect delay(1000); Serial.print(++teller); Serial.print(' '); }

Serial.println('\n'); Serial.println("Connection established!"); Serial.print("IP address:\t"); Serial.println(WiFi.localIP()); // Send the IP address of the ESP8266 to the computer }

Step 8: Code, Personal Info:

personal info:

SSID > name of your wifi network

WIFI PASSWORD > password of your wifi network

FIREBASE HOST > something like "?????????????". You can find it in the "Data" tab of your Realtime Database.

AUTH KEY > Project settings > Service accounts > Database secrets

Step 9: Esp8266 Drivers:


Click HERE > unzip and install

Step 10: Test the Code:

Upload code:

use esp8266 module in board manager > click "ESP-12E module".

Open serial monitor and set it to "115200".

And you should get the same data as in your database.