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jboone / tpms

Tire Pressure Monitoring System decoding tools.
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Additional HW-stuff for grab traffic #4

Open iDoka opened 9 years ago

iDoka commented 9 years ago

Hi, Jared! On the "Hak5 1511 – Tracking Cars Wirelessly And Intercepting Femtocell Traffic" video I saw some device with two SMA-connector. It connect between antenna and RF-cable. Probably it is SAW-filter for improve narrow-band selectivity, unfortunately in README I can't find any information about of this device. The color of its PCB remember about oshpark service, but finding this PCB design on they service was unsuccessful. Could you share info about this device? (For example with adding folder "hw" in repo or just adding design link in README on some service look like oshpark)

Thanks, Dmitry

alynx7 commented 9 years ago

Hi iDoka, of course a filter could improve the performance. Anyway jboone talked about his SAW-filter in this video https://www.youtube.com/watch?v=bKqiq2Y43Wg at 5:30.

Anyway, I succeded in decoding packets without that ;)

iDoka commented 9 years ago

Hi alynx7! I'm have ordered SAW like B39431B3730H110, B39431B3732H110 from Digikey. I'm worrying about insertion loss by this passive Filter. Currently I'm thikning about LNA use.

Thanks, Dmitry