Earth Day: CERERE- a WSN for Agricultural and Environmental ControlApril 8, 2012

CERERE (Crop and Environmental wiREless monitoRing System) is a complete system for agricultural and environmental control using a Wireless Sensor Network.

Squidbee motes
Agriculture is one of the areas most likely to benefit from the deployment of wireless sensor networks. Squidbee motes, usually equipped with temperature, humidity and light sensors, could play a role in preserving the environment by reducing water usage and providing early alerts for frost or high temperature damage. However Squidbee motes are quite energy consuming and not suitable for battery-powered application. Moreover, nodes use 802.15.4 RF modules but lack a complete network stack; therefore the setup and the management of a Squidbee-based WSN is quite complex and time-consuming.

Firstly, we have developed an experimental stack for Squidbee nodes: our network is auto-organizing and uses a simple reactive, hierarchical routing protocol. In addition, nodes can enter in sleep mode to save battery: we have profiled the power consumption of every component of Squidbee motes and we have identified strategies to increase energy efficiency. For example, we have been implementing a Scheduled-Rendezvous protocol to organize transmissions and synchronize sleep/wake-up cycles of nodes. We have also studied the effects of vegetation, humidity and position of nodes on the propagation and strength of XBee radio signal.

Instantaneous sensed data can be visualized on a map using a mashup (based on Google Maps) or a GIS application. Moreover, the evolution of measured values can be plotted on-line using an AJAX script; in addition, data can be exported to a spreadsheet or to an Extended Environments Markup Language (EEML) properly-formatted file, a standard for sharing sensor data between remote responsive environments, both physical and virtual.

A short presentation by Filippo De Stefani, including many screenshots and additional information, is available here.

If you are searching for Wireless Sensor Networks devices (motes) you may be interested in our ready to market sensor platform: Waspmote. You can discover the differences between both platforms in the document: Waspmote vs SquidBee.

WSNs are the proof of how open hardware can help you to save the planet.

Via and Source: Universitá di Pavia

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