[英]BLE: How to get correct service UUID and characteristic UUID?
我是藍牙連接的新手,我想在我的 iOS 項目中添加第二個設備。 我已經有一個設備,新設備與第一個設備非常相似,但有點不同。 我有兩個設備的一個進程,我沒有更改很多代碼,只是為新設備創造了所有價值。 我的所有設備都有不同的名稱和標識符,第一個設備工作正常。
為了創建 UUID 值,我使用了 UUID 生成器 ( https://www.guidgenerator.com/online-guid-generator.aspx )。
class BleConstants: NSObject {
let deviceTwoServiceUUID = “59DE3994-6A63-4654-8FF0-F85C5163B2F5”
let deviceTwoFirstCharacteristicUUID = “59DE3994-6A63-4654-8FF0-F85C5163B2F6”
let deviceTwoSecondCharacteristicUUID = “59DE3994-6A63-4654-8FF0-F85C5163B2F7”
let deviceOneServiceUUID = “A6AF4483-E210-457B-B9D6-B8A621513D1D”
let deviceOneFirstCharacteristicUUID = “A6AF4483-E210-457B-B9D6-B8A621513D2D”
let deviceOneSecondCharacteristicUUID = “A6AF4483-E210-457B-B9D6-B8A621513D2D”
}
class BleManager: NSObject, CBCentralManagerDelegate, CBPeripheralDelegate {
@objc private(set) static var sharedInstance = BleManager()
var cbManager : CBCentralManager? = nil
var currentPeripheral : CBPeripheral? = nil
var secondService : CBService? = nil
var firstService : CBService? = nil
var secondFirstCharacteristic : CBCharacteristic!
var secondSecondCharacteristic : CBCharacteristic!
var firstFirstCharacteristic : CBCharacteristic!
var firstSecondCharacteristic : CBCharacteristic!
func initCentralManager() {
if cbManager == nil {
cbManager = CBCentralManager(delegate: self, queue: nil, options: [CBCentralManagerOptionRestoreIdentifierKey : “MyApp”, CBCentralManagerOptionShowPowerAlertKey: true])
}
func deinitCentralManager() {
cbManager = nil
}
func isBluetoothAvailable() -> Bool {
return cbManager?.state == CBManagerState.poweredOn
}
func scan() {
if (cbManager != nil && (cbManager?.isScanning)!) {
return
}
discoveredPeripherals.removeAll()
let serviceUUIDs = [CBUUID(string: BleConstants.deviceTwoServiceUUID), CBUUID(string: BleConstants.deviceOneServiceUUID)]
cbManager?.scanForPeripherals(withServices: serviceUUIDs,
options: [CBCentralManagerScanOptionAllowDuplicatesKey : 1])
}
func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) {
if(!discoveredPeripherals.contains(peripheral)) {
discoveredPeripherals.append(peripheral)
}
}
func stopScan() {
if cbManager != nil && (cbManager?.isScanning)! {
cbManager?.stopScan()
}
}
func connect(peripheral: CBPeripheral) {
if cbManager?.state == CBManagerState.poweredOn {
if currentPeripheral == nil || currentPeripheral?.state != CBPeripheralState.connected {
cbManager?.connect(peripheral, options: nil)
} else {
cbManager?.cancelPeripheralConnection(peripheral)
}
}
}
func centralManager(_ central: CBCentralManager, didConnect peripheral: CBPeripheral) {
Device.savePeripheralString(peripheral: peripheral.identifier.uuidString)
AutoConnect.stop()
DeviceUpdate.updateProgress = .None
Device.isDongleConnected = true
currentPeripheral = peripheral
currentPeripheral?.delegate = self
currentPeripheral?.discoverServices(nil)
disableSleep()
}
func disableSleep() {
UIApplication.shared.isIdleTimerDisabled = true
}
func peripheral(_ peripheral: CBPeripheral, didDiscoverServices error: Error?) {
if error != nil {
return
}
if let services = peripheral.services {
for service in services {
if service.uuid.uuidString == BleConstants.deviceTwoServiceUUID {
Device.dongleType = port.second
secondService = service
peripheral.discoverCharacteristics(nil, for: service)
}
if service.uuid.uuidString == BleConstants.deviceOneServiceUUID {
Device.dongleType = port.first
firstService = service
peripheral.discoverCharacteristics(nil, for: service)
} else {
Log.bt("didDiscoverServices for peripheral not found \(peripheral.identifier.uuidString)")
}
}
}
}
func peripheral(_ peripheral: CBPeripheral, didDiscoverCharacteristicsFor service: CBService, error: Error?) {
for characteristic in service.characteristics! {
if characteristic.uuid.uuidString == BleConstants.deviceOneFirstCharacteristicUUID {
firstCharacteristic = characteristic
}
else if characteristic.uuid.uuidString == BleConstants.deviceOneSecondCharacteristicUUID {
firstSecondCharacteristic = characteristic
else if characteristic.uuid.uuidString == BleConstants.deviceTwoFirstCharacteristicUUID {
secondFirstCharacteristic = characteristic
} else if characteristic.uuid.uuidString == BleConstants.deviceTwoSecondCharacteristicUUID {
secondSecondCharacteristic = characteristic
} else {
Log.bt("didDiscoverCharacteristics not found \(characteristic.uuid.uuidString)")
}
}
if Device.dongleType == .deviceTwo {
openPortDeviceTwo()
} else {
openPortDeviceOne()
}
}
}
來自日志的數據:
對於第一台設備:
對於第二個設備:
根據連接到我的第一個服務 UUID 和第一個特征 UUID 的第 16 步應用程序中第二個設備的日志信息,這是錯誤的!
你知道嗎,我創建的 UUID 是否正確?
PS:Android 應用程序適用於兩種設備。
非常感謝!
為多個 BLE 設備接收相同的服務和特征 UUID 是完全正常的,僅意味着所有設備都提供完全相同的服務。
例如:如果您有兩個測量一個人的心率的設備,例如智能手表,兩個設備可能都提供具有相同 UUID 的心率服務。
如果您想區分設備,可以使用您在提供的日志的第 3 步中收到的標識符。
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