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