IoT with BLE Beacon comes with an basic knowledge with research opportunities, planning and strategy. The book includes basic of Internet of Things, Wireless Sensor Network, Data Aggregation in WSN, Bluetooth, Bluetooth Low Energy and BLE Beacons. Chapter 1 includes introduction, architecture, taxonomy and research opportunities of IoT.Chapter 2 includes introduction, architecture, characteristic, security parameters, and applications of WSN. Chapter 3 includes introduction, challenges, and types of data aggregation in WSN. Chapter 4 includes introduction with versions of Bluetooth. Chapter 5 includes introduction, working, features, market demand, configurations, network topology, protocols and profiles, architecture, versions and applications.Chapter 6 includes introduction, features, market demand, configurations, applications and research opportunities of BLE Beacon.