SAN JOSE, Calif. Snap, the operating systems for wireless sensor networks from Synapse Wireless Inc. (Huntsville, Ala.) has been linked up with the Si1000 wireless microcontroller from Silicon Laboratories Inc. (Austin, Texas) to enable sub-GHz connectivity for smart meters, building automation and personal medical devices.
The combination, offered as the Synapse RF Engine module, is also suitable for commercial lighting control and asset tracking systems and more, Synapse said.
Snap is an Internet-enabled, IEEE 802.15.4-based, instant-on, multi-hop, mesh network protocol designed to run on a variety of microprocessors and microcontrollers. Snap has a memory footprint of 45-Kbytes and can support up to 16 million nodes in a single network. Any node can talk directly to any other node that is in range, and any node can talk indirectly to any other node via intermediate nodes.
The Snap network operating system supports Internet-enabled, wireless machine-to-machine communications, and offers an embedded Python interpreter for application development. Synapse was due to demonstrate the RF Engine at the company's booth at the Embedded Systems Conference here. Applications can be added and updated over-the-air.
The Si1000 wireless MCU combines a 25-MHz 8051 core, a sub-GHz RF transceiver, 64-kbytes of flash and a 10-bit ADC. The integrated power and low-noise amplifiers enable an RF link budget of greater than 140 dB without active external elements. The wireless MCUs offer active mode current consumption of 160-microamps per MHz. In sleep mode, they consume 315-nanoamps using the internal low frequency real-time-clock. In deep-sleep mode, they can operate on as little as 25-nA with full RAM retention.
The Synapse RF Engine module is available today priced at $29, with volume discounts available. Snap evaluation software to run on the Si1000 is available for free download from Synapse at www.synapsewireless.com.
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