Create a Real-Time Data Visualization Dashboard

Introduction

This project focuses on building a real-time data visualization dashboard using ESP32 or NodeMCU. It allows you to monitor various sensor data visually using charts and graphs.

Components Required

• ESP32 or NodeMCU
• Sensor(s) (e.g., DHT22 for temperature and humidity)
• Wi-Fi Connection
• HTML/CSS for the frontend
• JavaScript (Chart.js) for data visualization

Wiring Diagram

Code Explanation

The following code demonstrates how to set up the ESP32 to send sensor data to a web page, where it will be visualized:

ESP32 Code

#include <WiFi.h>
#include <DHT.h>

#define DHTPIN 4 // DHT22 pin
#define DHTTYPE DHT22 // DHT 22
DHT dht(DHTPIN, DHTTYPE);

const char* ssid = "your_SSID";
const char* password = "your_PASSWORD";

void setup() {
    Serial.begin(115200);
    dht.begin();
    WiFi.begin(ssid, password);
    
    while (WiFi.status() != WL_CONNECTED) {
        delay(1000);
        Serial.println("Connecting to WiFi...");
    }
    Serial.println("Connected to WiFi");
}

void loop() {
    float temperature = dht.readTemperature();
    float humidity = dht.readHumidity();

    if (isnan(temperature) || isnan(humidity)) {
        Serial.println("Failed to read from DHT sensor!");
        return;
    }

    // Here you would send the data to a server or update a database
    // For example, you can use HTTP POST to send the data
    delay(2000); // Delay between readings
}
        

HTML & JavaScript for Data Visualization

Conclusion

This project demonstrates how to create a real-time data visualization dashboard using ESP32 or NodeMCU. With this setup, you can easily monitor sensor data and visualize it in a user-friendly manner.