The first-generation MotionBee module integrates ST’s market-proven 3-axis digital-output MEMS accelerometer with a ZigBee platform from Ember Corporation that includes the EM250 System-on-Chip, a 2.4GHz, IEEE 802.15.4-compliant radio transceiver and processor, together with the EmberZNet PRO™ ZigBee networking software. The module detects accelerations in the selectable range of +/-2g and +/- 6g and transmits the information to a central connection point (star topology) or every other node (mesh topology) in a ZigBee wireless network. The module is fully programmable and its small size (49 x 27 x 5 mm) makes the deployment easier, such as in wearable medical or sports equipment.
Addressing specifically the requirements of remote sensing and control systems, ZigBee technology enables the implementation of broad-based wireless mesh networks that are able to run for months on inexpensive primary batteries, representing a viable alternative to costly hard-wired systems. The first-generation MotionBee modules are optimized for designs that require long battery life, a low external component count, and a reliable, proven, industry-standard networking solution.
ST’s complete and cost-effective remote motion control platform enables wireless sensor networks in a variety of existing and emerging applications, such as vibration monitoring and detection in different indoor and outdoor environments, automated navigation systems, or bio-sensor networks in remote-healthcare scenarios.
ST’s first MotionBee device, the SPMB250-A1, is available now, with samples priced at $60. An evaluation kit is also available, with two pre-programmed modules and a ZigBee dongle for integration with a PC.