Date of Award


Degree Name

Master of Science


Plant and Soil Science

First Advisor

Watson, Dennis


Hay that has been baled with incorrect moisture content or that has been under the influence of moisture has potential to generate heat and create a fire hazard. Traditional means of monitoring baled hay temperature in storage, by inserting a pipe probe with thermometer, are time consuming. A ZigBee wireless sensor network could be used to remotely monitor internal hay bale temperatures. Tests were conducted to determine the maximum amount of hay through which a 2.4 GHz ZigBee module could transmit data and the resulting signal strength (RSSI). Based on analysis of the data, a ZigBee transmitter with 2 mW transmitting power can transmit data through 9 ft of baled hay and a ZigBee transmitter with 50 mW transmitting power can transmit data through 18 ft of baled hay. In general, RSSI decreased significantly with each additional 3 ft of baled hay.




This thesis is only available for download to the SIUC community. Current SIUC affiliates may also access this paper off campus by searching Dissertations & Theses @ Southern Illinois University Carbondale from ProQuest. Others should contact the interlibrary loan department of your local library or contact ProQuest's Dissertation Express service.