Bluetooth is a short-range wireless technology standard that is used for exchanging data between fixed and mobile devices over short distances. Zigbee is an IEEE 802.15.4-based specification for a suite of high-level communication protocols used to create personal area networks with small, low-power digital radios, such as for home automation, medical device data collection, and other low-power low-bandwidth needs, designed for small scale projects which need wireless connection. Hence, Zigbee is a low-power, low data rate, and close proximity (i.e., personal area) wireless ad hoc network. Thread is low-power wireless mesh networking protocol designed for IoT applications like smart homes and smart buildings.