SunSPOT

SUN SPOT (Small Programmable Object Technology) est une technologie de noeuds de réseaux de capteurs sans fil programmables en Java.

Caractéristiques Matérielles

• 180 Mhz 32-bit ARM920T core, 512K pSRAM/4M FlashRAM
• ChipCon 2420 radio 2.4 GHz IEEE 802.15.4
• USB interface
• 3.7V rechargeable 750 mAh prismatic lithium ion battery
• 40 uA deep sleep mode, 40 mA to 100+ mA
• 64 mm x 38 mm
• Double sided connector for stackable boards

Sensors and Actuators

• 8 tri-color LEDs
• 3D accelerometer
• 5 general purpose I/O pins
• 4 hi current output pins
• 1 A/D converter
• Temperature sensor
• Light sensor

Squawk JVM and Runtime

• Motivations : Memory constrained devices
• Fully capable J2ME-level Java VM with OS functionality
• Features
  • No operating system : Runs on the bare metal on ARM
  • Device driver are written in Java
  • Isolate application model (sub/super set of JSR121)
  • Inter-isolate communication
  • Provides lower-level asynchronous message delivery
  • Memory footprint : 80K for the VM, 270K for the Runtime

Liens

• http://www.sunspotworld.com/
• Squawk http://research.sun.com/projects/squawk