This document discusses Internet of Things (IoT) technologies and how Arduino can be used to build IoT projects. It provides examples of smart home devices, RFID tracking at NFL stadiums, and keyless vehicle access systems. It also discusses data in IoT, including how data is shared, digitized, mined from smart devices and machines. Arduino hardware and software is introduced along with examples of sensors and WiFi modules used in IoT projects built with Arduino. A circuit simulator for Arduino projects is also listed.