Advances in I/W/EoT (Internet, Web, Everything of Things) based smart environments have created huge demand in wireless sensor networks (WSNs). These smart environments require energy efficient hardware and software due to nature of wireless communication and constraints of sensors incorporated in the system. “IEEE 802.15.4” standard is used for wireless medium access and data transmission at physical layer (PHY) and Medium Access Control (MAC) layer. It provides MAC sublayer which may work in beacon-enabled or non-beacon-enabled modes. The case study based focused approach provides better understanding of IoT applications with useful insights of hardware and software technologies. In this paper IoE based home automation system is simulated for understanding architecture of IoE based environments. “IEEE 802.15.4” protocol is analyzed using simulation using “contiki-os” and “cooja” simulator environment. The data generated by simulation is analyzed using packet capturing tool for identifying the nature of wireless communication and protocols involved in WSN. Factors affecting IPv6 packet transfers in WSN using “IEEE 802.15.4” and 6LoWPAN protocol is analyzed using simulation.