Which platform is open source and designed for sensors and controlling physical objects?

• A. Raspberry Pi
• B. Arduino
• C. ESP32
• D. BeagleBone

Answer: (B)

Open-source hardware and software that emphasizes easy interaction with the physical world. Arduino fits this exactly: its hardware designs and software (the Arduino IDE and libraries) are released under permissive open-source licenses, inviting modification and sharing. This openness, combined with microcontroller boards designed for straightforward sensor input and actuator output, makes it ideal for quickly prototyping projects that read sensors and control devices like LEDs or motors. The ecosystem is built around simple real-time IO, beginner-friendly programming, and abundant sensor shields and examples, which is why Arduino is the best match. While other platforms offer powerful features, they don’t center on the same combination of open hardware/software and direct, approachable physical computing.