1.Nodemcu ESP8266 Starting Guide With Firebase |ElectroCSE

Introduction

This tutorial provides a step-by-step guide on using the NodeMCU ESP8266 with Firebase. It covers the necessary components, setup process, and basic coding to get you started with IoT projects. This guide is particularly useful for beginners looking to integrate their ESP8266 with Firebase for real-time data management.

Step 1: Gather Required Components

Before starting your project, ensure you have the following components:

• NodeMCU ESP8266
  • Purchase from here or here.
• Micro USB cable
  • Needed for code uploading. Buy it here.
• LED and Breadboard
• Arduino IDE
  • Download it from the official Arduino website.
• Firebase Database
  • Create an account on Firebase and set up a project.

Step 2: Install Necessary Libraries

To use Firebase with NodeMCU, you need to install specific libraries in the Arduino IDE.

1. Open the Arduino IDE.
2. Go to File > Preferences.
3. In the Additional Board Manager URLs field, add the following link:

   http://arduino.esp8266.com/stable/package_esp8266com_index.json
   

4. Install the ESP8266 board by going to Tools > Board > Boards Manager, search for ESP8266, and install it.

Download the Firebase library from the following link

• Firebase Library
5. Unzip and add the library to Arduino IDE by going to Sketch > Include Library > Add .ZIP Library.

Step 3: Set Up Firebase

1. Create a new Firebase project in the Firebase console.
2. In your project, go to the Database section and create a Realtime Database.
3. Set the database rules to allow read/write access for testing:

   {
     "rules": {
       ".read": "auth != null",
       ".write": "auth != null"
     }
   }
   

Step 4: Write the Arduino Code

1. Open Arduino IDE and create a new sketch.
2. Include the necessary libraries at the top of your sketch:

   #include <ESP8266WiFi.h>
   #include <FirebaseArduino.h>
   

3. Define your WiFi credentials and Firebase database URL:

   #define FIREBASE_HOST "your-database-name.firebaseio.com"
   #define FIREBASE_AUTH "your-database-secret"
   const char* ssid = "your-SSID";
   const char* password = "your-PASSWORD";
   

4. Set up the WiFi connection and Firebase in the setup() function:

   void setup() {
     Serial.begin(115200);
     WiFi.begin(ssid, password);
     Firebase.begin(FIREBASE_HOST, FIREBASE_AUTH);
   }
   

5. Add code to read or write data to Firebase in the loop() function:

   void loop() {
     Firebase.setInt("LED", digitalRead(LED_PIN));
     delay(1000);
   }
   

Step 5: Upload Code and Test

1. Connect your NodeMCU ESP8266 to your computer using the micro USB cable.
2. Select the correct board and port in the Arduino IDE under Tools.
3. Click the upload button to upload the code to the NodeMCU.
4. Open the Serial Monitor to check for connection and data being sent to Firebase.

Conclusion

You have now successfully set up your NodeMCU ESP8266 with Firebase. This foundation allows you to expand your IoT projects and utilize real-time database capabilities. As next steps, consider experimenting with different sensors or devices to send data to Firebase, or explore more complex functionalities such as authentication and data security in your projects. Happy coding!