Does MvvmCross.Plugin.BLE support characteristic notifications

Characteristics notifications in BLE are a way for devices to notify connected clients of changes to specific characteristics without the client needing to continuously poll the device. To handle notifications, you typically need to enable them on the characteristic by setting the Client Characteristic Configuration Descriptor (CCCD) to the appropriate value, which is usually done using platform-specific code or through a cross-platform library like Plugin.BLE, which MvvmCross.Plugin.BLE references.

In practice, when using MvvmCross.Plugin.BLE, you would likely need to implement the logic for handling characteristic notifications manually. This involves:

1. Discovering Services and Characteristics: Use the plugin to discover the services and characteristics of the BLE device.
2. Enabling Notifications: Set up the CCCD to enable notifications for the desired characteristics. This step might require using platform-specific code or leveraging the underlying Plugin.BLE functionality.
3. Handling Notification Events: Implement event handlers to process the notifications when they are received. This typically involves attaching a handler to the characteristic's `ValueUpdated` event or similar, depending on the specific implementation details of the plugin and the underlying BLE library.

Here is a simplified example of how you might handle notifications using Plugin.BLE, which could be adapted for use with MvvmCross.Plugin.BLE:

csharp
// Assuming 'characteristic' is a discovered characteristic
characteristic.ValueUpdated += (sender, args) =>
{
    // Process the updated value here
    string val = args.Characteristic.StringValue;
    Console.WriteLine("Update: " + val);
};

// Enable notifications
await characteristic.StartUpdatesAsync();

In summary, while MvvmCross.Plugin.BLE does not explicitly document support for characteristic notifications, it provides a framework that can be used to implement such functionality by leveraging the underlying BLE library and platform-specific code for enabling notifications.