刷新许多蓝牙外围设备的RSSI值 [英] Refreshing RSSI value of many bluetooth peripherals

问题描述

我正在尝试从多个蓝牙外设确保iOS上的RSSI指示器(带BLE的6). 我可以使用scanForPeripheral获取RSSI:

I'm trying to mesure RSSI indicator on iOS (6 with BLE) from several bluetooth peripheral. I can get RSSI with scanForPeripheral :

NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithBool:YES], CBCentralManagerScanOptionAllowDuplicatesKey, nil];

[_manager scanForPeripheralsWithServices:nil
                                 options:options];

加上:

- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI {

这可行，但是我无法控制数据包的接收速率，结果似乎不确定.

this works but I have no control on the rate of packets receive and the result seems uncertain.

我已阅读: https://stackoverflow.com/a/12486927/270209 ，但我的评分不是完全接近100毫秒(超过1到2秒)

I've read : https://stackoverflow.com/a/12486927/270209 but my rate is not close to 100ms at all (more 1~2 seconds)

如果我连接到设备，则readRSSI的结果似乎更可靠.

If I'm connected to the device the result with readRSSI seems more reliable.

我正在寻找一种激发"外围设备以使其在扫描模式下更频繁地更新的方法，或者一次连接至多个外围设备的方法.

I'm looking for a way to "stimulate" peripherals for more frequents updates in scan mode or a way to connect to more than one peripheral at a time.

谢谢

我也尝试过快速启动/停止扫描，看来在开始扫描时可以检测到更多设备并且更新频率更高

Edit : I've also tried to start / stop scan quickly, it seems that at start scan detects more devices and updates are more frequent

推荐答案

我确定您已经知道了这一点，但以防万一有人遇到此问题(如我刚才所做的那样)以寻找其他信息，如果您如果不将其他iOS设备与coreLocation一起使用，则需要使用[self.myPeripheral readRSSI];调用peripheralDidUpdateRSSI:委托.

I'm sure you've already figured this out but just in case someone comes across this (like I just did) looking for other info, if you're not using other iOS devices with coreLocation you need to call the peripheralDidUpdateRSSI: delegate using [self.myPeripheral readRSSI];.

您可以根据需要在didUpdateValueForCharacteristic:中一次调用RSSI数据更新，一次在updateValue委托中.

You can call for RSSI data updates in didUpdateValueForCharacteristic: as often as you like once in the updateValue delegate.

在viewDidLoad中不需要此: NSDictionary *options = etc...此NSDictionary在didDiscoverPeripheral:委托中创建.

You don't need this in viewDidLoad: NSDictionary *options = etc... This NSDictionary is created in the didDiscoverPeripheral: delegate.

因此总体流程为:

在您获取RSSI数据的NSLog中检查您是否正在接收RSSI ...

Check that you are receiving RSSI in the NSLog where you obtained the RSSI data...

- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI{

NSString *localName = [advertisementData objectForKey:CBAdvertisementDataLocalNameKey];

 if ([localName length] > 0){
    NSLog(@"Discovered: %@ RSSI: %@", peripheral.name, RSSI);
    // your other needs ...
}

在此处调用peripheralDidUpdateRSSI:，因为如果将通知值设置为YES，这将连续更新.

Call peripheralDidUpdateRSSI: here since this is where updates will occur continuously if you've set notify value to YES [peripheral setNotifyValue:YES forCharacteristic:characteristic];

- (void) peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error{

//Call the peripheralDidUpdateRSSI delegate ..
[self.myPeripheral readRSSI];

// do all of your other characteristic value updates here 
}

每次更新以前的特征值时，

readRSSI都会在您在UILabel(或您使用的任何东西)上执行RSSI更新的地方调用该委托:

readRSSI will call the delegate where you perform your RSSI updates on your UILabel (or whatever you're using) every time you update the previous characteristics values:

- (void)peripheralDidUpdateRSSI:(CBPeripheral *)peripheral error:(NSError *)error;
{
_rssiLabel.text = [self.myPeripheral.RSSI stringValue];
NSLog(@"RSSI Method");   
}

如果您不需要应用程序的特征值，则可以在其中以需要RSSI值刷新的任何时间在其中运行循环.

If you don't need characteristic values for your app just run a loop in there with whatever timing you need the RSSI value to refresh.

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