Arduino vs Raspberry Pi: Which One for Your Project?

This is one of the most common questions from students starting a final-year project. The short answer: Arduino for real-time hardware control, Raspberry Pi for computing-heavy tasks. Here is the longer version.

Arduino: what it is good at

Arduino is a microcontroller — it runs a single loop of code with no operating system. This makes it extremely reliable for time-sensitive tasks: reading sensors at precise intervals, controlling motors, generating PWM signals, and responding to interrupts in microseconds.

Raspberry Pi: what it is good at

Raspberry Pi is a single-board computer running Linux. It can run Python scripts, host a web server, process images with OpenCV, connect to databases, and run multiple processes simultaneously. It is not suitable for hard real-time control.

The hybrid approach

Many professional projects use both: Arduino handles sensor reading and actuator control, while Raspberry Pi handles data logging, display, and network communication. They communicate over UART or I2C.

For final-year projects

If your project involves sensor data, motor control, or simple automation — Arduino (or ESP32) is usually the right choice. If it involves image processing, machine learning, or a full web interface — Raspberry Pi or a combination makes more sense.