Inconsistent behaviour by proximity API - iOS iBeacon - ios

Question

I am converting an iOS device into iBeacon and then using core location' ranging API to detect beacon' proximity. Now, this works but I see an unpredictable behaviour where sometimes at a defined distance (say 10 meters away) I see No Beacon sometimes Far Beacon and some times Near Beacon.
Is there a way to make this behaviour more consistent?
- (void)viewDidLoad {
[super viewDidLoad];
self.beaconSwitch.on = NO;
self.beaconView.backgroundColor = [UIColor clearColor];
self.peripheralManager = [[CBPeripheralManager alloc] initWithDelegate:self queue:nil];
BeaconRegion *beaconRegion = [[BeaconRegion alloc] init];
self.beaconRegion = [[CLBeaconRegion alloc] initWithProximityUUID:beaconRegion.uuid major:[beaconRegion.major shortValue] minor:[beaconRegion.minor shortValue] identifier:beaconIdentifier];
}
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
[self.peripheralManager stopAdvertising];
}
- (IBAction)doneButtonPressed:(id)sender {
[self dismissViewControllerAnimated:YES completion:nil];
}
- (IBAction)beaconSwitchPressed:(id)sender {
if (self.beaconSwitch.on == true) {
self.beaconView.beaconState = BNBeaconStateBroadcasting;
NSDictionary *data = [self.beaconRegion peripheralDataWithMeasuredPower:nil];
[self.peripheralManager startAdvertising:data];
} else {
self.beaconView.beaconState = BNBeaconStateStop;
[self.peripheralManager stopAdvertising];
}
}
Here is how I am converting my iOS device into a beacon:
And here is how I am getting its proximity:
- (void)viewDidLoad {
[super viewDidLoad];
BeaconRegion *beaconRegion = [[BeaconRegion alloc] init];
self.beaconRegion = [[CLBeaconRegion alloc] initWithProximityUUID:beaconRegion.uuid identifier:beaconIdentifier];
self.beaconRegion.notifyOnEntry = YES;
self.beaconRegion.notifyOnExit = YES;
self.beaconRegion.notifyEntryStateOnDisplay = YES;
self.locationManager = [[CLLocationManager alloc] init];
self.locationManager.delegate = self;
self.detectionSwitch.on = NO;
}
- (IBAction)beaconDetectionSwitchPressed:(id)sender {
if (self.detectionSwitch.isOn) {
[self.locationManager startMonitoringForRegion:self.beaconRegion];
[self.locationManager requestStateForRegion:self.beaconRegion];
} else {
self.lastProximity = CLProximityUnknown;
[self.locationManager stopMonitoringForRegion:self.beaconRegion];
[self.locationManager stopRangingBeaconsInRegion:self.beaconRegion];
self.titleLabel.text = #"";
self.messageLabel.text = #"";
}
}
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
[self.locationManager stopMonitoringForRegion:self.beaconRegion];
[self.locationManager stopRangingBeaconsInRegion:self.beaconRegion];
self.locationManager = nil;
}
- (void)locationManager:(CLLocationManager *)iManager didEnterRegion:(CLRegion *)iRegion {
NSLog(#"Detected a beacon");
if (![self.beaconRegion isEqual:iRegion]) {
return;
}
NSLog(#"Entered into the beacon region = %#", iRegion);
[self.locationManager startRangingBeaconsInRegion:self.beaconRegion];
}
- (void)locationManager:(CLLocationManager *)manager didRangeBeacons:(NSArray *)beacons inRegion:(CLBeaconRegion *)region {
NSLog(#"Ranging beacon successful");
if (beacons.count > 0) {
CLBeacon *nearestBeacon = beacons[0];
CLProximity currentProximity = nearestBeacon.proximity;
if (currentProximity == self.lastProximity) {
NSLog(#"No Change in Beacon distance");
} else {
self.lastProximity = currentProximity;
[self updateUserAboutProximity];
}
} else {
self.lastProximity = CLProximityUnknown;
}
}
- (void)updateUserAboutProximity {
NSString *title = #"--";
NSString *message = #"--";
switch (self.lastProximity) {
case CLProximityUnknown:{
title = #"No Beacon";
message = #"There is no nearby beacon";
}
break;
case CLProximityImmediate:{
title = #"Immediate Beacon";
message = #"You are standing immediate to video wall!";
}
break;
case CLProximityNear:{
if (self.isServerCallOn) {
title = #"Near Beacon";
message = #"You are standing near to video wall!";
} else {
title = #"Near Beacon";
message = #"You are standing near to video wall! Initiating a server call.";
if (!self.ignoreSeverCallTrigger) {
self.isServerCallOn = YES;
[self talkToServer];
} else {
NSLog(#"Ignoring server call trigger");
message = #"Ignoring server call trigger!";
}
}
}
break;
case CLProximityFar:{
title = #"Far Beacon";
message = #"You are standing far from video wall!";
}
break;
default:
break;
}
self.titleLabel.text = title;
self.messageLabel.text = message;
}
- (void)locationManager:(CLLocationManager *)manager didDetermineState:(CLRegionState)state forRegion:(CLRegion *)region {
if (state == CLRegionStateInside) {
NSLog(#"Starting Ranging");
[self.locationManager startRangingBeaconsInRegion:self.beaconRegion];
}
}
- (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status {
if (![CLLocationManager locationServicesEnabled]) {
NSLog(#"Location Service Not Enabled");
}
if ([CLLocationManager authorizationStatus] != kCLAuthorizationStatusAuthorizedAlways) {
NSLog(#"Location Service Not Authorized");
}
}

Answer 1

For now, I have put a condition on received signal strength indicator (rssi) value and accepting anything > -60 in Near proximity to make the distance little more predictable. So, within Nearby proximity also I trigger my action if rssi > -60.