Learn ARDUINO-C with Real Code Examples
Updated Nov 27, 2025
Practical Examples
Blinking LED
Temperature/humidity monitoring with DHT11
Servo motor control
IoT device sending data via Wi-Fi
Obstacle-avoiding robot using ultrasonic sensor
Troubleshooting
Check USB connection and board selection
Ensure correct COM port
Verify library inclusion
Use Serial Monitor for debugging
Restart IDE if compilation fails
Testing Guide
Test small sketches first
Use Serial Monitor for debugging
Test peripherals individually
Validate power supply requirements
Check library versions and compatibility
Deployment Options
Upload sketch via USB
Use standalone USB power or battery
Integrate into a PCB with Arduino Nano or Pro Mini
OTA updates for Wi-Fi enabled boards
Combine multiple boards for modular systems
Tools Ecosystem
Arduino IDE
PlatformIO
Arduino CLI
Serial Monitor/Plotter
Third-party libraries (Adafruit, SparkFun, etc.)
Integrations
Sensors (temperature, humidity, motion)
Actuators (motors, servos, relays)
Displays (OLED, LCD, 7-segment)
Communication (I2C, SPI, UART, Wi-Fi, Bluetooth)
External services (ThingSpeak, MQTT, cloud APIs)
Productivity Tips
Reuse sketches as templates
Leverage existing Arduino libraries
Debug incrementally
Use constants for pin assignments
Document wiring diagrams
Challenges
Limited RAM and flash
Debugging without advanced IDE tools
Power management for battery-powered projects
Handling multiple sensors or devices
Transitioning to more advanced MCUs or RTOS