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https://github.com/codertx/esp32_weather_notifier

ESP32-based asynchronous web server that monitors real-time temperature and humidity data using the DHT11 sensor, with WhatsApp notification integration.
https://github.com/codertx/esp32_weather_notifier

Last synced: 28 days ago
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ESP32-based asynchronous web server that monitors real-time temperature and humidity data using the DHT11 sensor, with WhatsApp notification integration.

Host: GitHub
URL: https://github.com/codertx/esp32_weather_notifier
Owner: CodeRTX
License: apache-2.0
Created: 2024-10-29T03:19:40.000Z (3 months ago)
Default Branch: main
Last Pushed: 2024-10-29T21:55:10.000Z (3 months ago)
Last Synced: 2024-11-10T03:31:28.498Z (3 months ago)
Language: C++
Size: 1.97 MB
Stars: 0
Watchers: 1
Forks: 0
Open Issues: 0
Metadata Files:
- Readme: README.md
- License: LICENSE

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README

# ESP32 Weather Notifier

## Project Overview
This project implements an **ESP32-based asynchronous web server** to monitor temperature and humidity data from a DHT11 sensor in real-time. Additionally, the server sends **automated WhatsApp notifications** of sensor readings to specified contacts.

## Features
- **Real-Time Data Monitoring**: Live temperature and humidity data available via a web server.
- **WhatsApp Notifications**: Automated updates sent through the CallMeBot API.
- **Statistical Analysis**: Script for extended analysis of collected sensor data, including mean, variance, standard deviation, median, and mode.

## Components
- ESP32 MCU (MicroController Unit)
- DHT11 temperature and humidity sensor
- Breadboard and connecting wires
- Resistor (1kΩ)

## Setup Instructions

1. **Arduino Library Setup**:
- Install the "DHT library" and "Adafruit Unified Sensor" library from Arduino Library Manager.
- Include the ESP32 board package by adding the following URL to **Additional Board Manager URLs** in Arduino Preferences:
```
https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json
```

2. **Connection Diagram**:
![Circuit Diagram](images/ckt_diag.jpeg)

3. **Arduino Code Upload**:
- Use `ESP32_WebServer_DHT11_WhatsApp.ino` as the main code for uploading to ESP32.
- `extra_StatisticalAnalysis.ino` contains additional statistical analysis.

4. **WhatsApp API Setup**:
- Configure the CallMeBot API for WhatsApp notifications by entering your phone number and API key in the code.

![WhatsApp API Setup](images/whatsapp_api1.jpg)

![WhatsApp API Notifications](images/whatsapp_api2.jpg)

> **Note**: Replace personal information in the code (such as SSID, Wi-Fi password, phone number, and API key) with your own details, and ensure you keep this information secure.

## Web Interface
![Server on PC](images/Capture-2.PNG)
The web server allows users to view current temperature and humidity readings on any device with a browser.

## Statistical Analysis
For extended data insights, the additional script performs statistical analysis on the sensor readings, providing:
- **Mean**
- **Variance**
- **Standard Deviation**
- **Median**
- **Mode**

![Statistical Analysis](images/statistics.png)

## Results and Demonstrations

- **Serial Monitor Output**:
The data streamed from the ESP32 for debugging.
![Serial Monitor](images/serial_monitor.png)

- **Real-Time Plots**:
Graphical data representations using Arduino’s Serial Plotter.
![Serial Plotter Analysis](images/SerialPlotterAnalysis.png)

## Conclusion
The ESP32 Weather Notifier demonstrates an IoT application with real-time data monitoring and automated messaging. The flexibility of the ESP32 and DHT11 sensor combination allows for numerous IoT applications.

## References
- Truong, Hong Kha. “Temperature and humidity monitor with ESP8266.” [Theseus](https://www.theseus.fi/handle/10024/262546)
- [ESP32-DHT11 Web Server Tutorial](https://randomnerdtutorials.com/esp32-dht11-dht22-temperature-humidity-web-server-arduino-ide/)
- [CallMeBot WhatsApp API Guide](https://randomnerdtutorials.com/esp32-send-messages-whatsapp/)

## MTech Mini-Project
This project was completed as part of my MTech mini-project.