IOTAssignment

Smart Weather Station (IoT System)

My project is a personal Smart Weather Station designed to collect data (temperature and humidity) using a DHT11 sensor connected to my Raspberry Pi. The system processes, formats, and transmits sensor data for live monitoring and visualisation.

System Overview

The project implements a complete IoT architecture:

• Sensor Layer: DHT11 temperature and humidity sensor
• Processing Layer: Raspberry Pi running Python scripts
• Gateway Layer: Blynk Cloud
• Application Layer: Mobile dashboard and web dashboard on blynk with live graphs and gauges

Features Implemented

• Raspberry Pi configured and accessed via SSH
• GitHub repository created and linked to device
• Python virtual environment set up for dependency management
• DHT11 sensor successfully integrated with Raspberry Pi GPIO
• Real-time sensor data collection (temperature & humidity)
• JSON-formatted telemetry with timestamped readings
• Live data transmission to Blynk cloud using HTTP API
• Mobile dashboard displaying:
  • Real-time temperature gauge
  • Real-time humidity gauge
  • Historical data graph (time-series visualisation)

Technologies Used

• Python
• Raspberry Pi OS
• DHT11 Temperature & Humidity Sensor
• GPIO (adafruit-circuitpython-dht library)
• Blynk IoT Cloud Platform
• HTTP REST API
• JSON data formatting
• Git & GitHub

Data Format

Sensor readings are structured as JSON before logging and transmission:

{
  "temperature": 18.3,
  "humidity": 58,
  "timestamp": 1777859514.73
}