The biggest police station in western Europe is being built less than half a mile from where I live. Your phone will keep on ringing and ringing...
"Major Variola (ret)" wrote: > > In some parts of rural america, folks signal the presence of cops by > flashing their headlights > when driving. > > Occurs to me that would be a cool function for SDR: press code for or > say "cop". For N seconds, > phone periodically sends "cop" message picked up by other phones, > ignored by base station [1]. Phone also listens for these local > broadcasts. Upon hearing a suprathreshold number of "cop" messages the > phone alerts its owner. > > Better than a radar detector for emissionless, but visible, cops. Over > the hill coverage. Issues of > spoofing, trust, consensus familiar to readers here. > > [1] (different band entirely? UWB? B-tooth? FRS? )