swift - 如何在 Swift 3 中将字节数组发送到 ble？

Question

我正在尝试将数据发送到 ble，但我的设备只接受字节数组。如何将数据转换为字节数组并在 Swift 3 中发送？

print("hex value is",hexRepresentation)
print("pairing code",pairingcode)
var aaa = calcchecksum(data:"4A6BF961585C3F86DCEB562CEC51A4CE")

if let auxData = (hexRepresentation+"4A6BF961585C3F86DCEB562CEC51A4CE"+aaa).data(using: .utf8), let lChar = self.mainCharacteristic {   
    let bytearraydata = [UInt8](auxData) as Data?

    aPeripheral.writeValue(bytearraydata, for: lChar, type: .withResponse
}

Answer 1

找出写入了哪个 CBCharacteristic 属性。

  let data:[UInt8] = [0x01, 0x03, 0x012, 0x01]
  let writeData =  Data(bytes: data)

  self.selectPeripheral.writeValue(writeData, for: writeCharacteristic, 
  type: WithResponse)