How Can I convert a CBUUID to UINT16?
I want to procure the device information in the advertisement data as UINT16.
I am getting the error
Could not cast value of type 'CBUUID' (0x1d2715e68) to 'NSNumber' (0x1d25c9db0). 2019-12-04 14:17:18.731697-0500 ProjectName[717:125723] Could not cast value of type 'CBUUID' (0x1d2715e68) to 'NSNumber' (0x1d25c9db0).
My Advertisement Data in terminal
[
"kCBAdvDataTxPowerLevel": 0,
"kCBAdvDataIsConnectable": 1,
"kCBAdvDataTimestamp": 597179838.727399,
"kCBAdvDataServiceUUIDs": <__NSArrayM 0x281252e20>(
22043200-9530-4EA8-9D21-04146852E51F
)
,
"kCBAdvDataServiceData": {
"Device Information" = {length = 6, bytes = 0x010000020004};
},
"kCBAdvDataLocalName": base0
]
I have highlighted the information which I need in Bold.
I have the following code below.
public func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) {
guard peripheral.state != .connected else {
return
}
let advertisementDataService = advertisementData[CBAdvertisementDataServiceDataKey]
let deviceInformation = advertisementDataService as! Dictionary<UInt16,AnyObject>
}
Thank You!!!
As per [the documentation[(https://developer.apple.com/documentation/corebluetooth/cbadvertisementdataservicedatakey), the dictionary associated with CBAdvertisementDataServiceDataKey is of type <CBUUID,Data>. Having retrieved the dictionary you can then subscript it using the appropriate CBUUID instance (0x180A is the Device Information service).
public func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) {
guard peripheral.state != .connected else {
return
}
if let deviceInformation = advertisementData[CBAdvertisementDataServiceDataKey] as? Dictionary<CBUUID,Data>,
let data = deviceInformation[CBUUID(string:"0x180A")] {
// Do something with the data
}
}