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Pulasthi Narada
Published © GPL3+

Connecting ESP8266 to Firebase to Send & Receive Data

In this tutorial, you will learn how to upload and download data to/from a Firebase Real time database with Arduino UNO and ESP8266.

BeginnerFull instructions provided119,120
Connecting ESP8266 to Firebase to Send & Receive Data

Things used in this project

Hardware components

ESP8266 ESP-01
Espressif ESP8266 ESP-01
×1
Arduino UNO
Arduino UNO
×1
Breadboard (generic)
Breadboard (generic)
×1
Jumper wires (generic)
Jumper wires (generic)
×1
USB-A to B Cable
USB-A to B Cable
×1

Software apps and online services

Arduino IDE
Arduino IDE
Firebase
Google Firebase

Story

Read more

Schematics

Circuit diagram for upload code to ESP8266 using Arduino.

Circuit diagram for after uploading code to ESP8266 using Arduino.

Code

FirebaseDemo_ESP8266.ino

Arduino
//
// Copyright 2015 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//

// FirebaseDemo_ESP8266 is a sample that demo the different functions
// of the FirebaseArduino API.

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

// Set these to run example.
#define FIREBASE_HOST "your FIREBASE HOST"
#define FIREBASE_AUTH "your secret"
#define WIFI_SSID "your WIFI SSID"
#define WIFI_PASSWORD "your WIF PASSWORD"

void setup() {
  Serial.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);
}

int n = 0;

void loop() {
  // set value
  Firebase.setFloat("number", 42.0);
  // handle error
  if (Firebase.failed()) {
      Serial.print("setting /number failed:");
      Serial.println(Firebase.error());  
      return;
  }
  delay(1000);
  
  // update value
  Firebase.setFloat("number", 43.0);
  // handle error
  if (Firebase.failed()) {
      Serial.print("setting /number failed:");
      Serial.println(Firebase.error());  
      return;
  }
  delay(1000);

  // get value 
  Serial.print("number: ");
  Serial.println(Firebase.getFloat("number"));
  delay(1000);

  // remove value
  Firebase.remove("number");
  delay(1000);

  // set string value
  Firebase.setString("message", "hello world");
  // handle error
  if (Firebase.failed()) {
      Serial.print("setting /message failed:");
      Serial.println(Firebase.error());  
      return;
  }
  delay(1000);
  
  // set bool value
  Firebase.setBool("truth", false);
  // handle error
  if (Firebase.failed()) {
      Serial.print("setting /truth failed:");
      Serial.println(Firebase.error());  
      return;
  }
  delay(1000);

  // append a new value to /logs
  String name = Firebase.pushInt("logs", n++);
  // handle error
  if (Firebase.failed()) {
      Serial.print("pushing /logs failed:");
      Serial.println(Firebase.error());  
      return;
  }
  Serial.print("pushed: /logs/");
  Serial.println(name);
  delay(1000);
}

Credits

Pulasthi Narada
0 projects • 8 followers

Comments

Related channels and tags
  • Espressif
  • Google
  • Internet of Things
  • Internet of Things