المجلة الدولية للعلوم والتقنية

This paper presents an energy efficiency evaluation of a state-to-the-art Low Power Wide Area communication module used in IoT applications. Specifically, the E32-433T20DC Ebyte LoRa module is used. A proper testbed is first designed to understand the module real capabilities and boundaries. The testbed comprises of a one-way communications setup using two LoRa modules, an MCU, an OLED display, and the Siglent SDS1202X-E digital Oscilloscope. The LoRa modules are used one as a transmitter and the other as a receiver. The testbed is designed to enable accurate evaluation of the power requirements of the both sending and receiving nodes in various functional modes. These modes are; the Normal mode, the Sleep mode, the Power saving mode, and the Wake-up mode. In addition, the energy consumption fluctuations in the power signal are also analyzed to further understand the time required to transit from one mode to another. This is a very important aspect to take into consideration when deciding on the feasibility of these modes.