Abstract
Internet of Things is a highly applicable technology due to its versatility in areas such as agronomy, health applications, and industry. Besides, portability makes these devices affordable. IoT development boards communicate through Wi-Fi transmitted messages via the Internet, depending on the inner workings of the IoT development board, energy consumption can vary in such transmission. Furthermore, this consumption could change if the board is powered by different power supplies and the quantity of Wi-Fi transmitted messages. This paper provides a methodology to acquire an energy profile when sending data (byte) using Message Queue Telemetry Transport (MQTT) protocol on DEVKIT V1 NodeMCU-32 (ESP32) development board. Three different power supplies were used for the board, a 3.7 LiPo Battery, 5v usb Power bank and 9V NiMh rechargeable battery. The higher current consumption obtained was using a 3.7 battery, followed by 5v and the lowest current consumption was when using 9v. However, results demonstrate that when using the 9v power supply the energy consumption is two times higher than using 3.7v. Therefore, the best voltage source for transmission and energy consumption using a NodeMCU-32 development board will be 3.7 volts.
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