SunSPOT Wireless Modules Gurdip Singh and Shravanthi Kallem Pervasive Sensor Network Laboratory...

SunSPOT Wireless Modules

Gurdip Singh and Shravanthi KallemPervasive Sensor Network LaboratoryComputing and Information Sciences

Wireless sensor networks

Sensing field Base stationsPC and Displays

SunSPOT

-180 MHz 32bit ARM920T core 512K RAM4Mb Flash Memory2.4 GHz IEEE 802.15.4 radioUSB interface3-axis accelerometer, temperature, light, touch sensors

3D Acclerometer

Get the current acceleration along each axis• getAccelX()• getAccelY()• getAccelZ()

3D Acclerometer

To get the current acceleration relative to a previously measured acceleration.

• getRelativeAccelX()• getRelativeAccelY()• getRelativeAccelZ()

3D Acclerometer

To compute the inclination, or tilt, of an axis• getTiltX()• getTiltY()• getTiltZ()

Light/Temperature

• Light• Temperature

Wireless network

Base Station

SunSPOTs

Patient Monitoring System

Goal

Attach sensors to your body. Figure it whether you are moving: • Sleeping• Sitting• Standing• Walking• ….

Accelerometers

Tilted

Vertical

Horizontal

vertical

horizontal

vertical

Other postures/activities

• Attempting to get up from sleeping position• Fall• Slip

• Light/temperature sensors• Interference• Battery power – transmission range