Course Content

The main purpose of this paper is to design a smart wireless sensor network (WSN) for an agricultural environment. The WSN is designed for supervising and controlling the variegated factors such as humidity, water level, temperature and human machination. The WSN using Zigbee as the transmission medium consists of end devices with sensors, routers that propagate the network over larger distances, and a coordinator that communicates with the computer, which in turns illustrates the data and controls the entire system. Sensors gather the various agricultural factors in real-time and transmit it using Internet of things, which collaborates with one another to perform action on behalf of people to reduce or eliminate the need of human labor. As part of the investigation, extensive studies were proposed a wireless sensor network nodes deployment strategy for digital agricultural data acquisition, and performed to analyze collected data.

The agricultural monitoring system with wireless sensor networks is deployed at agricultural site and developed for agriculture monitoring. Low power sensor network measures temperature, humidity and light intensity through wireless sensor nodes equipped with different sensors. Collected data by the sensors and the data is send to the base station. The base station will analyze the received data.

The coordinator corresponds with the base station through serial communication RS232. The base station in turn analyses and stores the incoming from the nodes data. It also manages the control signals that regulate the sensors’ sampling rate. The coordinator and the end-devices do not use clock units since a real-time clock is incorporated in the system. Knowledge of the precise time is important so as the base station to be able to check for the on-time arrival of all the packets, through the coordinator. The router is placed to extend the range of the wireless network while end-devices can be connected directly to the coordinator or to a router. The end devices, which are scattered in the field, contain the temperature and humidity sensors. The most important characteristic of the network is the bidirectional communication by Zigbee technology.