This document provides an introduction to Arduino and Raspberry Pi for sensor and temperature interfacing. It describes what Arduino is, how it works, common Arduino boards like the Uno, and example projects using Arduino like a crop growth monitor and smart aquarium. Advantages of Arduino include its affordability and ease of use, while disadvantages include limited coding languages. Raspberry Pi is then introduced as a small, low-cost computer that can run multiple programs simultaneously for more complex projects than Arduino. Common temperature sensors for both Arduino and Raspberry Pi are also outlined, including NTC thermistors, RTDs, thermocouples, and semiconductor-based sensors.