在蓝牙低功耗(BLE)通信中,如果在循环上编写BLE命令而没有正确处理响应,可能会导致无法获取所有预期的响应。以下是一些基础概念和相关解决方案:
以下是一个Swift示例,展示如何在BLE通信中正确处理响应:
import CoreBluetooth
class BLEManager: NSObject, CBCentralManagerDelegate, CBPeripheralDelegate {
var centralManager: CBCentralManager!
var peripheral: CBPeripheral?
var characteristic: CBCharacteristic?
override init() {
super.init()
centralManager = CBCentralManager(delegate: self, queue: nil)
}
func centralManagerDidUpdateState(_ central: CBCentralManager) {
if central.state == .poweredOn {
central.scanForPeripherals(withServices: nil, options: nil)
}
}
func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) {
self.peripheral = peripheral
central.connect(peripheral, options: nil)
}
func centralManager(_ central: CBCentralManager, didConnect peripheral: CBPeripheral) {
peripheral.delegate = self
peripheral.discoverServices(nil)
}
func peripheral(_ peripheral: CBPeripheral, didDiscoverServices error: Error?) {
guard let services = peripheral.services else { return }
for service in services {
peripheral.discoverCharacteristics(nil, for: service)
}
}
func peripheral(_ peripheral: CBPeripheral, didDiscoverCharacteristicsFor service: CBService, error: Error?) {
guard let characteristics = service.characteristics else { return }
for characteristic in characteristics {
if characteristic.uuid == YourCharacteristicUUID {
self.characteristic = characteristic
peripheral.setNotifyValue(true, for: characteristic)
}
}
}
func peripheral(_ peripheral: CBPeripheral, didUpdateValueFor characteristic: CBCharacteristic, error: Error?) {
guard let data = characteristic.value else { return }
// 处理响应数据
handleResponse(data)
}
func sendCommand(_ command: Data) {
guard let characteristic = self.characteristic else { return }
peripheral?.writeValue(command, for: characteristic, type: .withResponse)
}
func handleResponse(_ data: Data) {
// 处理接收到的响应数据
print("Received response: \(data)")
}
}
didUpdateValueFor
回调中处理接收到的响应数据。通过以上方法,可以有效解决在循环上编写BLE命令时无法获取所有响应的问题。
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