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Try to use TI SimplicTi as the base to build a VSCP node.
It is suited for small RF networks with less than 250 nodes, SimpliciTI low-power radio frequency (RF) protocol runs on MSP430 microcontrollers and CC110x/CC2500 RF transceivers. It supports peer-to-peer communication to use access point to store and forward messages and range extenders to extend range of network to 4 hops. Network protocol supports wide range of low-power applications including alarm/security, automated meter reading, home automation, and active RFID
Application examples:
Alarm & security: occupancy sensors, light sensors, carbon monoxide sensors, glass-breakage detectors
Smoke detectors.
Automatic meter reading: gas meters, water meters, e-meters ,
active RF-ID applications
some links:
http://focus.ti.com/docs/toolsw/folders/print/smartrftm-studio.html
http://focus.ti.com/docs/toolsw/folders/print/ez430-rf2500.html
Radio module to be used:
simpliciti_developers_notes.pdf
cc2500.pdf
general_packet_sniffer_user_manual.pdf
swru130_simplicity_principle.pdf
Code Files:
swra141_code_files.zip
http://focus.ti.com/lit/an/swra141/swra141.pdf
http://focus.ti.com/lit/an/swra109b/swra109b.pdf
http://focus.ti.com/lit/ug/swru109a/swru109a.pdf
http://focus.ti.com/lit/an/swra112b/swra112b.pdf
http://focus.ti.com/lit/ml/swrd064/swrd064.pdf
13 cm Antenna:
http://helix.remco.tk/
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