ios - iBeacon emitted via [peripheralManager startAdvertising:] will trigger enter and soon followed by exit region on another device -


i'm trying grab ibeacon advertising code airlocate sample code empty app. looks like:

    nsdictionary *peripheraldata = nil;      region = [[clbeaconregion alloc] initwithproximityuuid:[[nsuuid alloc] initwithuuidstring:beaconuuid] major:beaconmajor minor:beaconminor identifier:beaconidentifier];     peripheraldata = [region peripheraldatawithmeasuredpower:nil];//[nsnumber numberwithint:power]      // region's peripheral data contains corebluetooth-specific data need advertise.     if(peripheraldata)     {         [peripheralmanager startadvertising:peripheraldata];          return yes;     }

the empty app able emit ibeacon signal can monitored app on device. problem on app, locationmanager:didenterregion: delegate method followed locationmanager:didexitregion: quickly.

peripheral device: ipad mini 2 retina central device: iphone 5s

running airlocate app separately configure 1 device ibeacon emitter , device monitor can reproduce issue mentioned above.

some other findings:

  1. if leave receiver app is, report didenterregion automatically in few minutes, followed didexitregion quickly, still same problem.
  2. if move emitter app background mode pressing home button , enter same app again, receiver trigger round of 2 monitoring methods, still same problem.

my guess frequency of ibeacon advertising small (say, once few seconds) receiver may think region exited before receiving package again. may bug in ios.

does know it?

note cannot make ios transmit ibeacon in background. if lock screen comes up, exit notification on other device.

by default, ios device transmits advertisements @ rate of 30 hz, again, app must in foreground. have measured hardware ble sniffer. doubt transmit frequency issue.


Comments

Post a Comment

Popular posts from this blog

javascript - RequestAnimationFrame not working when exiting fullscreen switching space on Safari -

request animation frame stops working when exiting fullscreen clicking on original space's safari window. fine if fullscreen mode canceled escape key or calling cancelfullscreen(). steps reproduce: open https://dl.dropboxusercontent.com/u/769042/prezi/safari-fullscreen.html click "draw raf", kittie appears click "fullscreen", go fullscreen click "draw raf", kittie appears go space original safari was, showing "click exit fullscreen mode", click anywhere, out fullscreen click "draw raf", nothing happens what handling click calling: window.requestanimationframe(draw); which draws on canvas context: function draw() { ctx.drawimage(img, math.random()*500|0, math.random()*400|0, 100, 100); } i checked .hidden , .visibilitystate, updated correctly. tested on osx 10.9.3, safari 7.0.4 (9537.76.4). has workaround/solution other switching old settimeout? this sounds webkit bug 88940 : using reque
Read more

Python ctypes access violation with const pointer arguments -

i have api i'm trying wrap in python (2.7.6 on win7) code using ctypes. here's api: client_dllfunc bool clientapi search_exporttoclipcopy(clienthsearch handle, int channel, lpctstr filename, const time_t& from, const time_t& to, const bool* cameras, int length, bool usepassword, lpctstr password, bool includetextin = false, bool excludeplayer = false); the issue i'm having cameras argument; , i've had issue other const pointer arguments well. here's how i'm wrapping api: def search_exporttoclipcopy(self, hsearch, csearch, filename, tfrom, tto, cameras, length, usepassword, password, includetextin=true, excludeplayer=false): exporttoclipcopy = self.sdkdll.search_exporttoclipcopy exporttoclipcopy.argtypes = [c_int, c_int, c_wchar_p, c_long, c_long, pointer(c_bool), c_int, c_bool, c_wchar_p, c_bool, c_bool] exporttoclipcopy.restype = c_bool exporttoclipcopy(hsearch, csearch, filename, tfrom, tto, cameras, length, usepassword, pass
Read more