我是Xcode的新手，我写了一些代码来发现并连接到BLE模块（Adafruit Bluefruit LE）。但是，在扫描时，什么也没找到。
有什么帮助吗？
这是我的代码
import UIKit
import CoreBluetooth
class ViewController: UIViewController, CBCentralManagerDelegate, CBPeripheralDelegate {
//let BLUEFRUIT_SERVICE = "DFB0"
var centralManager: CBCentralManager!
var connectedPeripheral : CBPeripheral!
@IBAction func myButton(sender: UIButton) {
print(sender.tag)
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
centralManager=CBCentralManager(delegate: self, queue: nil)
}
func scanForDevice () {
centralManager.scanForPeripheralsWithServices(nil, options: nil )
// I also tried with the following line, but I don't understand the use of BLUEFRUIT_SERVICE = "DFB0"
// centralManager.scanForPeripheralsWithServices([CBUUID(string: BLUEFRUIT_SERVICE)], options: nil)
}
func centralManager(central: CBCentralManager, didDiscoverPeripheral peripheral: CBPeripheral, advertisementData: [String : AnyObject], RSSI: NSNumber) {
print("\(peripheral.name!)")
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
//Central Manager delegates
func centralManagerDidUpdateState(central: CBCentralManager) {
print("central manager did updated started")
switch(central.state){
case .PoweredOff:
print("Power is OFF")
break
case .Resetting:
print("Resetting")
break
case .PoweredOn :
print("Power is ON");
break
case.Unauthorized:
print("Unauthorized")
break
case .Unsupported:
print("Unsupported")
break
default:
print("Unknown")
break
}
}
}
最佳答案
使用LightBlue之类的应用程序进行扫描时，能够看到设备吗？
尝试连接到Bluno设备时遇到了类似的问题。随时查看我的代码，看看它是否对您有用。目前很难对它进行编码以查找两个特定的Bluno设备，但是如果找到正确的设备，您应该可以轻松地将其更改为连接状态。
https://github.com/FredLoh/BluetoothResearchProject
请尝试以下代码。注意：您可能必须将设备名称（当前为Bluno）以及DF80和DF81字符串更新为设备可接受的名称。您可能还必须将其正确连接到所使用的任何接口。
import UIKit
import CoreBluetooth
class ViewController: UIViewController, CBCentralManagerDelegate, CBPeripheralDelegate {
var centralManager: CBCentralManager!
var connectedPeripheral: CBPeripheral!
@IBAction func myButton(sender: UIButton) {
print(sender.tag)
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
centralManager=CBCentralManager(delegate: self, queue: nil)
}
func startScanning() {
print("Started Scanning!")
//Could add service UUID here to scan for only relevant services
centralManager = CBCentralManager(delegate: self, queue: nil)
}
func sendMessage() {
let message = "5"
let data = message.dataUsingEncoding(NSUTF8StringEncoding)
if terminalChar != nil {
peripheral!.writeValue(data!, forCharacteristic: terminalChar, type: CBCharacteristicWriteType.WithoutResponse)
}
}
func peripheral(peripheral: CBPeripheral, didWriteValueForCharacteristic characteristic: CBCharacteristic, error: NSError?) {
print("Value was sent")
}
func discoverDevices() {
print("discovering devices")
centralManager.scanForPeripheralsWithServices(nil, options: nil)
}
func centralManagerDidUpdateState(central: CBCentralManager) {
print("Checking state")
switch (central.state) {
case .PoweredOff:
print("CoreBluetooth BLE hardware is powered off")
case .PoweredOn:
print("CoreBluetooth BLE hardware is powered on and ready")
bluetoothAvailable = true;
case .Resetting:
print("CoreBluetooth BLE hardware is resetting")
case .Unauthorized:
print("CoreBluetooth BLE state is unauthorized")
case .Unknown:
print("CoreBluetooth BLE state is unknown");
case .Unsupported:
print("CoreBluetooth BLE hardware is unsupported on this platform");
}
if bluetoothAvailable == true {
discoverDevices()
}
}
func centralManager(central: CBCentralManager, didDiscoverPeripheral peripheral: CBPeripheral, advertisementData: [String : AnyObject], RSSI: NSNumber) {
// print(peripheral)
let deviceName = "Bluno"
if let nameOfDeviceFound = peripheral.name {
if (nameOfDeviceFound == deviceName) {
print("Discovered \(deviceName)")
print("")
print(peripheral)
// Stop scanning
self.centralManager.stopScan()
print("Stopped Scanning")
// Set as the peripheral to use and establish connection
self.peripheral = peripheral
self.peripheral.delegate = self
self.centralManager.connectPeripheral(peripheral, options: nil)
}
else {
print("NOPE.EXE")
}
}
}
func centralManager(central: CBCentralManager, didConnectPeripheral peripheral: CBPeripheral) {
print("Did connect to peripheral.")
print("")
peripheral.delegate = self
peripheral.discoverServices([CBUUID(string: "DFB0")])
let state = peripheral.state == CBPeripheralState.Connected ? "yes" : "no"
print("Connected:\(state)")
}
// // Check if the service discovered is a valid IR Temperature Service
func peripheral(peripheral: CBPeripheral, didDiscoverServices error: NSError?) {
if(error != nil) {
print(error?.description)
}
for svc in peripheral.services! {
print("Service \(svc)\n")
print("Discovering Characteristics for Service : \(svc)")
peripheral.discoverCharacteristics([CBUUID(string: "DFB1")], forService: svc as CBService)
}
}
func peripheral(peripheral: CBPeripheral, didDiscoverCharacteristicsForService service: CBService, error: NSError?) {
if(error != nil) {
print(error?.description)
}
for characteristic in service.characteristics! {
if characteristic.UUID == CBUUID(string: "DFB1") {
self.terminalChar = (characteristic as CBCharacteristic)
peripheral.setNotifyValue(true, forCharacteristic: characteristic as CBCharacteristic)
// Send notification that Bluetooth is connected and all required characteristics are discovered
print("Found characteristic we were looking for!")
print(peripheral.readValueForCharacteristic(characteristic as CBCharacteristic))
}
}
}
func centralManager(central: CBCentralManager, didFailToConnectPeripheral peripheral: CBPeripheral, error: NSError?) {
print("Failed to connect to peripheral.")
}
func centralManager(central: CBCentralManager, didDisconnectPeripheral peripheral: CBPeripheral, error: NSError?) {
print("CONNECTION WAS DISCONNECTED")
}
}
关于ios - 找不到BLE外设，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/33989406/