The smart irrigation system using Internet of Things (IOT) by using nodemcu esp8266. The objectives of this project is to investigate the concept of smart irrigation system using IOT, to develop a system using a nodemcu esp8266 that processes the data from the soil sensor which automatically water the plant and to analyse the real time condition of soil of the plants via the smart phone that is connected to the internet. As water supply is becoming scarce in today's world there is an urgency of adopting smart ways of irrigation. The project describes how irrigation can be handled smartly using IOT. This project aims at saving time and avoiding problems like constant vigilance.