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
Other postures/activities
• Attempting to get up from sleeping position• Fall• Slip
• Light/temperature sensors• Interference• Battery power – transmission range