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我非常喜欢蓝牙LE，并且在阅读和写入设备时遇到一些困难。Xamarin蓝牙LE
我一直在关注Monkey.Robotics项目来指导我。现在我已经达到了保存我需要的特性和相应的描述符（用于读写）的部分。我试着实现写这个函数，但是我没有成功。
我一直在尝试使用这种方法来进行写入：
connectedPeripheral.WriteValue(NSData.FromString (sendText.Text), write_desc);
我也打印出来的我已经保存的所有特性的UUID和核实它们是否正确使用我的Mac的LightBlue应用。
我只是好奇，如果我需要做任何其他的准备工作，以便能够执行此写？
我已将我的代码附加到本帖子的底部。
感谢，
奥斯汀
CODE：
partial class ThirdViewController : UIViewController
{
CBService serviceNeeded;
private string serv_to_find = "6e400001-b5a3-f393-e0a9-e50e24dcca9e";
private string read_to_find = "6e400003-b5a3-f393-e0a9-e50e24dcca9e";
private string write_to_find = "6e400002-b5a3-f393-e0a9-e50e24dcca9e";
CBPeripheral connectedPeripheral;
CBCharacteristic write;
CBCharacteristic read;
CBDescriptor write_desc;
private string value = "";
List<CBPeripheral> ps = new List<CBPeripheral>();
public ThirdViewController (IntPtr handle) : base (handle)
{
}
public ThirdViewController()
{
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
MyPickerModel model = new MyPickerModel();
// Tie model to selected event
model.comSelected += (object sender, EventArgs e) =>
{
value = model.selectedCom;
};
// wire up the DiscoveredPeripheral event to update the table
BluetoothLEManager.Current.DeviceDiscovered += (object sender, CBDiscoveredPeripheralEventArgs e) => {
ps = BluetoothLEManager.Current.DiscoveredDevices;
textBox.Text += "\nFound device: ";
foreach (var temp in ps)
{
model.Add(temp.Name);
if (value == ""){
value = temp.Name;
}
textBox.Text += temp.Name + "\n";
}
Blue_Picker.Model = model;
};
BluetoothLEManager.Current.ScanTimeoutElapsed += (sender, e) => {
textBox.Text += "\nScan Timeout.";
BluetoothLEManager.Current.StopScanningForDevices();
};
}
partial void Logout_Button_TouchUpInside (UIButton sender)
{
// Create an instance of our AppDelegate
var appDelegate = UIApplication.SharedApplication.Delegate as AppDelegate;
// Get an instance of our MainStoryboard.storyboard
var mainStoryboard = appDelegate.MainStoryboard;
// Get an instance of our Login Page View Controller
var loginPageViewController = appDelegate.GetViewController(mainStoryboard, "LoginPageViewController") as LoginPageViewController;
// Wire our event handler to show the MainTabBarController after we successfully logged in.
loginPageViewController.OnLoginSuccess += (s, e) =>
{
var tabBarController = appDelegate.GetViewController(mainStoryboard, "MainTabBarController");
appDelegate.SetRootViewController(tabBarController, true);
};
// Set the Login Page as our RootViewController
appDelegate.SetRootViewController(loginPageViewController, true);
}
partial void ScanButton_TouchUpInside (UIButton sender)
{
if (BluetoothLEManager.Current.IsScanning)
{
BluetoothLEManager.Current.StopScanningForDevices();
textBox.Text += "\nDone Scanning";
}
else
{
BluetoothLEManager.Current.BeginScanningForDevices();
textBox.Text += "\nNow Scanning";
}
}
partial void DisconnectButton_TouchUpInside (UIButton sender)
{
if (connectedPeripheral == null) {
textBox.Text += "\nNo device connected.";
return;
}
textBox.Text += "\nDisconnecting from device " + connectedPeripheral.Name + "...";
BluetoothLEManager.Current.DisconnectPeripheral (connectedPeripheral);
connectedPeripheral = null;
Blue_Picker.Hidden = false;
}
async partial void ConnectButton_TouchUpInside (UIButton sender)
{
if (connectedPeripheral != null) {
textBox.Text += "\nDevice already connected.";
return;
}
StopScanning();
textBox.Text += "\nConnecting to device " + value + "...";
foreach (var temp in ps){
if (temp.Name == value){
BluetoothLEManager.Current.CentralBleManager.ConnectPeripheral (temp, new PeripheralConnectionOptions());
await Task.Delay(5000);
connectedPeripheral = temp;
InitializePeripheral();
break;
}
}
Blue_Picker.Hidden = true;
}
void StopScanning()
{
Task.Factory.StartNew (() => {
if (!BluetoothLEManager.Current.IsScanning)
return;
BluetoothLEManager.Current.StopScanningForDevices();
});
}
void InitializePeripheral()
{
// update all our shit
// > peripheral
// > service[s]
// > characteristic
// > value
// > descriptor[s]
connectedPeripheral.DiscoveredService += HandleDiscoveredService;
connectedPeripheral.DiscoveredCharacteristic += (sender, e) => {
HandleDiscoveredCharacteristic((CBPeripheral)sender, serviceNeeded);
};
connectedPeripheral.DiscoveredDescriptor += HandleDiscoveredDescriptor;
connectedPeripheral.DiscoverServices();
textBox.Text += "\nLooking for services";
}
void HandleDiscoveredService (object sender, NSErrorEventArgs e)
{
var peripheral = (CBPeripheral)sender;
//foreach (CBService service in peripheral.Services) {
// textBox.Text += "\nDiscovered Service: " + service.UUID.ToString();
// if (!services.Contains (service))
// services.Add (service);
//}
foreach (CBService service in peripheral.Services) {
if (service.UUID.ToString().Contains(serv_to_find)) {
serviceNeeded = service;
}
}
if (serviceNeeded == null)
return;
textBox.Text += "\nDiscovered service: " + serviceNeeded.UUID.ToString();
// discover the charactersistics
connectedPeripheral.DiscoverCharacteristics(serviceNeeded);
}
void HandleDiscoveredCharacteristic (CBPeripheral peripheral, CBService service)
{
foreach (CBService srv in peripheral.Services) {
// if the service has characteristics yet
if (srv.Characteristics == null)
continue;
foreach (var characteristic in service.Characteristics) {
if (characteristic.UUID.ToString().Contains (read_to_find)) {
read = characteristic;
textBox.Text += "\nDiscovered read characteristic: " + read.UUID.ToString();
connectedPeripheral.DiscoverDescriptors (read);
}
else if (characteristic.UUID.ToString().Contains (write_to_find)) {
write = characteristic;
textBox.Text += "\nDiscovered write characteristic: " + write.UUID.ToString();
connectedPeripheral.DiscoverDescriptors (write);
}
}
}
}
void HandleDiscoveredDescriptor (object sender, CBCharacteristicEventArgs e)
{
foreach (var descriptor in e.Characteristic.Descriptors) {
if (e.Characteristic.UUID == write.UUID) {
textBox.Text += "\nWrite descriptor: " + descriptor.ToString();
write_desc = descriptor;
}
else if (e.Characteristic.UUID == read.UUID) {
textBox.Text += "\nRead descriptor: " + descriptor.ToString();
}
}
}
partial void SendButton_TouchUpInside (UIButton sender)
{
textBox.Text += "\nNow writing: " + sendText.Text;
connectedPeripheral.WriteValue(NSData.FromString (sendText.Text), write_desc);
}
}
我也曾尝试：
connectedPeripheral.WriteValue(NSData.FromString (sendText.Text), write, CBCharacteristicWriteType.WithoutResponse);
而且似乎没有任何工作。