Abstract

This paper aims at reducing the power consumed by the sensors, to ensure that the battery life comes for a longer duration which is an advantage for smart city applications.Apart from this we also aim to bring in a comparative study between Arduino Uno and esp8266 12e Node MCU. We transmit the data for the sampled duration and make the microprocessor in Arduino Uno go to sleep for every 8 seconds. The same is carried out in Node MCU as Arduino Uno, but here since Node MCU already has an inbuilt sleep mode and transmits data only when active, the execution of sleep mode for every 8seconds is not required. Through Node MCU, the data obtained from the sensors are sent to the web server. This comparative study is drawn out in order to determine which gives a more holistic approach for power reduction and can be used for IOT applications.