我有两个通过蓝牙连接的iphone设备。是否有可能在这些设备之间获得信号强度?如果可能,怎么样? 谢谢, K.D
答案 0 :(得分:8)
查看Apple Sample Project,通过蓝牙将数据从一台设备传输到另一台设备。 BTLE Apple Sample Code
您可以通过RSSI(接收信号强度指示)
的值找出信号强度在示例代码中,您将在收到数据时获得RSSI值。在Project:
中的BTLECentralViewController.m中检查以下方法- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI
{
// Reject any where the value is above reasonable range
if (RSSI.integerValue > -15) {
return;
}
// Reject if the signal strength is too low to be close enough (Close is around -22dB)
if (RSSI.integerValue < -35) {
return;
}
NSLog(@"Discovered %@ at %@", peripheral.name, RSSI);
// Ok, it's in range - have we already seen it?
if (self.discoveredPeripheral != peripheral) {
// Save a local copy of the peripheral, so CoreBluetooth doesn't get rid of it
self.discoveredPeripheral = peripheral;
// And connect
NSLog(@"Connecting to peripheral %@", peripheral);
[self.centralManager connectPeripheral:peripheral options:nil];
}
}
每当您从其他设备的广告中收到数据时。您将从此处收到RSSI值,您可以找到强度和设备范围。
我希望这会有所帮助。