IoT Development for Beginners

What is IoT?

Internet of Things (IoT) connects physical devices to the internet, enabling data collection and remote control.

Getting Started Hardware

• Arduino: Microcontroller for beginners ($25)
• Raspberry Pi: Full computer for complex projects ($35-75)
• ESP32: WiFi + Bluetooth microcontroller ($5-10)
• Sensors: Temperature, humidity, motion, light

Simple IoT Project: Temperature Monitor

// Arduino + DHT11 sensor
#include "DHT.h"

#define DHTPIN 2
#define DHTTYPE DHT11

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(9600);
  dht.begin();
}

void loop() {
  float temp = dht.readTemperature();
  float humidity = dht.readHumidity();
  
  Serial.print("Temp: ");
  Serial.print(temp);
  Serial.print("°C Humidity: ");
  Serial.println(humidity);
  
  delay(2000);
}

IoT Communication Protocols

• MQTT: Lightweight messaging (perfect for IoT)
• HTTP/HTTPS: REST APIs
• WebSocket: Real-time bidirectional
• CoAP: Constrained devices

Cloud Platforms

• AWS IoT Core: Enterprise IoT platform
• Google Cloud IoT: Device management
• Azure IoT Hub: Microsoft's IoT solution
• ThingSpeak: Simple IoT analytics