FireFly is a low-cost wireless sensor network platform capable of data acquisition, processing & multi-hop mesh communication. Each battery-operated node functions with scalable & economical global time-synchronization and delivers a lifetime of 1.5-2 years. Fixed and mobile nodes can dynamically form a network and facilitate applications such as utility monitoring, surveillance, location tracking and voice communication. It is easy to add-on custom modules for user-specific applications.FireFly runs the Nano-RK real-time sensor operating system for easy deployment.
FireFly node features an IEEE 802.15.4 transceiver capable of short-range (50-100m) data communication with a maximum raw data rate of 250Kbps. An 8-bit microcontroller processes data from (optional) on-board light, motion, audio, temperature and acceleration sensors. Each node has a SD Flash card slot for add-on data acquisition and storage modules
Global time synchronization enables extremely energy efficient operation and extends the lifetime of each node by a factor of 4-5X more than current sensor networking platforms. Global time synchronization maximizes the common sleep time between nodes and enables high throughput operation with bounded end-to-end delay.
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| The RT-Link MAC protocol provides near optimal node lifetimes and out performs Low-Power Listening CSMA. RT-Link provides practical lifetimes of 1.5 to 2 years on 2AA batteries. |
They wake up for 25us, check if there is any transmission and go back to sleep if there is none.
RT-Link outperforms Low-Power Listen CSMA protocols such as the Berkeley B-MAC sensor protocol by the use of hardware-based global time synchronization.
Application:
More: http://www.ece.cmu.edu/firefly/
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