In this talk, we will explore the fascinating world of embedded systems and the Internet of Things (IoT) through the lens of microcontroller development boards and IoT boards. The presentation will start with an introduction to the basics of microcontroller boards, covering their key components and popular models like the Arduino Uno. Attendees will then learn how to get started with Arduino. To solidify these concepts, I will demonstrate two mini projects using the Arduino Uno. As we progress, we will transition to IoT development boards, such as the ESP8266 and ESP32, and discuss the differences between traditional microcontroller boards and IoT-focused ones. The session will culminate in a live demonstration of a remote temperature+light+humidity+fire control monitoring/trigger system, showcasing the power and potential of IoT applications. This talk is tailored for hobbyists eager to start with embedded systems, software engineers looking to branch into hardware, and beginners with no programming background.