https://github.com/ketis21/esp32-dht22-iot-monitor
ESP32-based IoT solution for real-time temperature and humidity monitoring with web visualization.
https://github.com/ketis21/esp32-dht22-iot-monitor
Last synced: about 1 month ago
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ESP32-based IoT solution for real-time temperature and humidity monitoring with web visualization.
- Host: GitHub
- URL: https://github.com/ketis21/esp32-dht22-iot-monitor
- Owner: Ketis21
- License: mit
- Created: 2025-02-23T14:46:40.000Z (4 months ago)
- Default Branch: main
- Last Pushed: 2025-03-04T14:24:44.000Z (3 months ago)
- Last Synced: 2025-05-08T22:54:20.439Z (about 1 month ago)
- Language: JavaScript
- Size: 54.7 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# 🌡️ ESP32 Temperature & Humidity Monitoring System
This project demonstrates how to build a simple IoT system for monitoring temperature and humidity using an ESP32 microcontroller, a DHT22 sensor, and a Node.js backend with MongoDB for data storage. The collected data can be visualized through a web interface.
---
## 🚀 **Features**
- 📡 **Real-time Data Collection:** ESP32 reads temperature and humidity from the DHT22 sensor.
- 🌐 **Wi-Fi Connectivity:** ESP32 sends the data to a Node.js server via HTTP POST requests.
- 🗄️ **Data Storage:** MongoDB stores all readings with timestamps.
- 📊 **Web Dashboard:** A simple frontend visualizes historical data using Chart.js.
- 🔄 **Daily Filtering:** View data by specific date, with automatic timezone adjustments.
---
## 🛠️ **Technologies Used**
### **Hardware:**
- ESP32 microcontroller
- DHT22 (AM2302) temperature and humidity sensor
### **Software:**
- ESP32 Arduino IDE (C++)
- Node.js and Express.js (Backend API)
- MongoDB (Database)
- Docker (Deployment)
- Chart.js (Data visualization)
---
## 📸 **System Architecture**
```mermaid
flowchart LR
ESP32 -- HTTP POST --> Node.js_API --> MongoDB
ESP32 -- Status --> Serial_Monitor
Web_Interface <-- GET API --> Node.js_API
```
---
## ⚙️ **Setup Instructions**
### **1. Hardware Setup:**
- Connect the DHT22 sensor to the ESP32:
- **VCC** → 3.3V
- **GND** → GND
- **DATA** → GPIO 4 (or any GPIO of your choice)
### **2. ESP32 Firmware:**
1. Install **Arduino IDE** and ESP32 board support.
2. Install the following Arduino libraries:
- `DHT sensor library` by Adafruit
- `Adafruit Unified Sensor`
3. Upload the firmware to ESP32 (example code in `esp32_firmware` folder).
### **3. Server Setup:**
1. Clone this repository:
```bash
git clone https://github.com/Ketis21/esp32-dht22-iot-monitor.git
cd esp32-dht22-iot-monitor
```
2. Install dependencies:
```bash
npm install
```
3. Create a `.env` file for MongoDB connection:
```ini
MONGO_URI=mongodb://localhost:27017/temperatureDB
PORT=3000
```
4. Start the server:
```bash
npm start
```
### **4. Docker Deployment (Optional):**
If you are using OpenMediaVault or any server with Docker:
```bash
docker-compose up -d
```
### **5. Access the Web Dashboard:**
Visit: `http://localhost:3000` (or your server's IP address)
---
## 📊 **API Endpoints**
### **1. Send Data from ESP32:**
```http
POST /api/data
Content-Type: application/json
{
"temperature": 22.5,
"humidity": 60
}
```
### **2. Get Data by Date:**
```http
GET /api/data/2025-01-01
```
---
## 🌟 **Screenshots**
---
## 🔒 **Security Considerations**
1. **Environment Variables:** Ensure the `.env` file is excluded from version control.
2. **Authentication:** Add user authentication if exposing the system to the internet.
3. **Firewall:** Close unused ports and use HTTPS for secure connections.
---
## 📜 **License**
This project is licensed under the MIT License. See the `LICENSE` file for more details.
---
🚀 *Happy coding and stay cool! 🌡️*