Connect wireless alarm sensors to computer

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i looking @ getting diy alram sensors , wireless receiver. looking connect wireless receiver arduino have act keyboard emulator , send diffrent key patters based on signals wireless receiver getting sensors. know can act keyboard emulator. possible connect wireless receiver , decode signals?

im having trouble understanding describing. sounds want 2 arduinos communicate wirelessly, 1 relaying sensor info other. receiving arduino sends info computer via keyboard inputs? 

a cheap , reliable method of wireless communication 2.4 ghz nrf24l01 transceiver. around $2~3 on ebay , work 10~20 meters depending on walls , such.

as far keyboard emulation, must done leonardo or smd verison of uno. dip version not capable without hardware modifications. dont know are, here link http://blog.makezine.com/2012/06/28/usb-keyboard-support-with-the-arduino-uno/

hope helps, luck.


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