Arduino, IoT/Wireless

Send Data to Firebase Using Arduino Uno WiFi Rev2

by Idris
November 25, 2020

Arduino, Arduino Uno WiFi Rev2

Let's try Firebase libraries on Arduino.

Introduction

Firebase (Google’s platform) is a mobile-backend-as-a-service that provides powerful features for building mobile apps. It has three core services: a realtime database, user authentication and hosting. In this tutorial, we will try to explore how to send data to Firebase using Arduino board – Arduino Uno WiFi Rev2.

Video

This video shows how to send data to Firebase using Arduino Uno WiFi Rev2.

Hardware Preparation

This is the list of items used in the video.

Arduino UNO WiFi Rev2.0 Dev Board

USB B Type Cable

Sample Program

This is Arduino sample program to read accelerometer sensor data and send to Firebase. Please install these 2 libraries from Library Manager.

Arduino_LSM6DS3 by Arduino V1.0.0
Firebase Arduino based on WiFiNINA by Mobizt V1.1.4

/*

  Project: Send Data to Firebase Using Arduino Uno WiFi Rev2

  Board: Arduino Uno WiFi Rev2

  External libraries:

  – Arduino_LSM6DS3 by Arduino V1.0.0

  – Firebase Arduino based on WiFiNINA by Mobizt V1.1.4

 */

#include <Arduino_LSM6DS3.h>

#include <Firebase_Arduino_WiFiNINA.h>

#define FIREBASE_HOST "your-firebase-project-id.firebaseio.com"

#define FIREBASE_AUTH "Your_Firebase_Database_Secret"

#define WIFI_SSID "Your WiFi SSID"

#define WIFI_PASSWORD "Your WiFi Password"

FirebaseData firebaseData;

String path = "/IMU_LSM6DS3";

String jsonStr;

void setup()

{

  Serial.begin(9600);

  delay(1000);

  Serial.println();

  Serial.print("Initialize IMU sensor…");

  if (!IMU.begin()) {

    Serial.println(" failed!");

    while (1);

  }

  Serial.println(" done");

  Serial.print("Accelerometer sample rate = ");

  Serial.print(IMU.accelerationSampleRate());

  Serial.println(" Hz");

  Serial.print("Connecting to WiFi…");

  int status = WL_IDLE_STATUS;

  while (status != WL_CONNECTED) {

    status = WiFi.begin(WIFI_SSID, WIFI_PASSWORD);

    Serial.print(".");

    delay(300);

  }

  Serial.print(" IP: ");

  Serial.println(WiFi.localIP());

  Serial.println();

  Firebase.begin(FIREBASE_HOST, FIREBASE_AUTH, WIFI_SSID, WIFI_PASSWORD);

  Firebase.reconnectWiFi(true);

}

void loop()

{

  float x, y, z;

  // Read IMU acceleration data

  if (IMU.accelerationAvailable()) {

    IMU.readAcceleration(x, y, z);

    // Send data to Firebase with specific path

    if (Firebase.setFloat(firebaseData, path + "/1-setFloat/X", x)) {

      Serial.println(firebaseData.dataPath() + " = " + x);

    }

    if (Firebase.setFloat(firebaseData, path + "/1-setFloat/Y", y)) {

      Serial.println(firebaseData.dataPath() + " = " + y);

    }

    if (Firebase.setFloat(firebaseData, path + "/1-setFloat/Z", z)) {

      Serial.println(firebaseData.dataPath() + " = " + z);

    }

    // Push data using pushJSON

    jsonStr = "{\"X\":" + String(x,6) + ",\"Y\":" + String(y,6) + ",\"Z\":" + String(z,6) + "}";

    if (Firebase.pushJSON(firebaseData, path + "/2-pushJSON", jsonStr)) {

      Serial.println(firebaseData.dataPath() + " = " + firebaseData.pushName());

    }

    else {

      Serial.println("Error: " + firebaseData.errorReason());

    }

    Serial.println();

    delay(2000);

  }

}