3 ms·
You are quite correct, however Apple have very sensibly been very conservative in what accuracy of distance estimation they provide to apps. The only distance v
by janekm 12y ago
You are quite correct, however Apple have very sensibly been very conservative in what accuracy of distance estimation they provide to apps. The only distance values provided are:
CLProximityUnknown, CLProximityImmediate, CLProximityNear, CLProximityFar.
These correlate reasonably well with the type of information that can be usefully derived from RSSI (i.e., you're next to the cash register, you're in/next to the shop, you're close to the shop).
- sleepybrett 12y agoSure but those are also highly variable. I built a test installation in a retail environment using about 15 beacons setting up four different types of zones. One of which was an attempt to do a 'tap your phone here interaction' (CLProximityImmediate trigger). The Beacon for that interaction was behind a piece of foamcore. Now I'm not a radio engineer, it may be that it was too many beacons for the area or the general wireless soup was high but it could sometimes take 20-30 seconds to see that beacon as immediate with your phone sitting smack dab on it. Sometimes 1sec. (iOS7.0 on both ipod touch 5thgen and iphone 5 devices) . Perhaps the filtering they use just needs to be tweaked a bit.