🌡️ Pull Request: Add DHT22 Temperature Monitoring with ESP32 & ThingSpeak

[shirshanag]

🧩 Description

This pull request adds a new IoT project that uses a DHT22 temperature sensor with an ESP32 to collect temperature data and upload it to ThingSpeak over Wi-Fi.
The project demonstrates real-time environmental monitoring and cloud data visualization.

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📁 Added Files

• code.ino → Arduino c code for ESP32 and DHT22 sensor integration.
• README.md → Detailed documentation explaining setup, circuit, and ThingSpeak configuration.
• circuit for DHT22+esp32.pdf → Circuit diagram

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⚙️ Features

• Reads temperature data from the DHT22 sensor
• Connects ESP32 to Wi-Fi using predefined SSID and password
• Sends real-time temperature readings to ThingSpeak every 20 seconds
• Displays current data and HTTP status codes on the Serial Monitor

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🚀 How to Run

1. Open the code.ino file in the Arduino IDE.
2. Install required libraries:
   • DHT sensor library
   • WiFi (built-in with ESP32 core)
   • ThingSpeak library
3. Update your ThingSpeak Channel Number and Write API Key in the code.
4. Connect DHT22 to ESP32 as shown in the README:
   • VCC → 3.3V
   • DATA → GPIO 4
   • GND → GND
5. Upload the code and open the Serial Monitor (baud rate 115200).
6. Check your ThingSpeak dashboard for live temperature updates.

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✅ Checklist

• Code compiles successfully
• Tested on ESP32 board
• ThingSpeak updates verified
• Added documentation and circuit details
• No syntax or library errors

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🧠 Applications

• IoT-based weather monitoring system
• Smart home temperature tracker
• Environmental data logger
• Educational IoT and cloud project

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Contributor: @shirshanag

IoT & AI Enthusiast ⚙️ | Data Science Learner 🤖 |

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Ready for Review ✅

[shirshanag]

@Tejas-Santosh-Nalawade please review and merge !!