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What is Arduino?

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  Arduino   is an open-source electronics platform designed for beginners and professionals to easily create interactive projects. It consists of: Hardware  – Programmable microcontroller boards (e.g., Arduino Uno, Nano, Mega). Software (IDE)  – A simple coding environment based on C/C++. Community & Ecosystem  – Thousands of free libraries, tutorials, and projects. Key Features of Arduino ✅  Easy to Use  – No advanced electronics knowledge required. ✅  Plug-and-Play  – Works with sensors, motors, displays, and more. ✅  Open-Source  – Schematics & code are freely available. ✅  Cross-Platform  – Works on Windows, macOS, and Linux. Popular Arduino Boards Board Microcontroller Key Features Arduino Uno ATmega328P Best for beginners, 14 digital I/O pins Arduino Nano ATmega328P Compact, breadboard-friendly Arduino Mega 2560 ATmega2560 54 digital pins, great for big projects Arduino Due ARM Cortex-M3 32-bit, faster than c...
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How do you troubleshoot network connectivity issues on a Raspberry Pi?

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  Troubleshooting network connectivity issues on a Raspberry Pi involves systematic checks across hardware, software, and network configurations. Here’s a step-by-step guide: 1. Verify Physical Connections Ethernet : Ensure the cable is securely plugged into both the Pi and router/switch. Try a different cable or port on the router. Wi-Fi : Confirm the Pi’s Wi-Fi antenna (if external) is connected. Check signal strength with: bash iwconfig wlan0 | grep "Signal" 2. Check Network Interface Status List all interfaces: bash ip a Look for  eth0  (Ethernet) or  wlan0  (Wi-Fi). If missing, the driver may not be loaded. Bring an interface up/down: bash sudo ip link set eth0 up # Enable sudo ip link set eth0 down # Disable 3. Test DHCP Configuration Renew DHCP lease : bash sudo dhclient -v eth0 # Ethernet sudo dhclient -v wlan0 # Wi-Fi Check assigned IP: bash hostname -I # Quick IP check ifconfig eth0 | grep "inet " # Detailed If no IP is a...
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