[D66] 'Intelligente lockdown' dommer met bluetooth apps

[Antid Oto]

Bluetooth class 2 heeft een bereik tot ongeveer 10 m. Technisch is het 
niet mogelijk om nauwkeurig <1.5 m afstand te traceren. Dom idee! Zal 
wel zo'n managertype bedacht hebben. Dus fuck maar off met je 
GGD-APP...TECHIMBECIELEN!



https://stackoverflow.com/questions/3624945/how-to-measure-distance-between-two-iphone-devices-using-bluetooth

Using bluetooth for localization is a very well known research field 
(ref.). The short answer is: you can't. Signal strength isn't a good 
indicator of distance between two connected bluetooth devices, because 
it is too much subject to environment condition (is there a person 
between the devices? How is the owner holding his/her device? Is there a 
wall? Are there any RF reflecting surfaces?). Using bluetooth you can at 
best obtain a distance resolution of few meters, but you can't calculate 
the direction, not even roughly.

You may obtain better results by using multiple bluetooth devices and 
triangulating the various signal strength, but even in this case it's 
hard to be more accurate than few meters in your estimates.