pyobjc-framework-corebluetooth

import objc from Foundation import NSObject, NSLog from CoreBluetooth import CBCentralManager, CBManagerDelegate # Define a delegate for CBCentralManager # PyObjC automatically bridges Python classes inheriting from NSObject # and implementing a protocol into Objective-C delegates. class MyCentralManagerDelegate(NSObject, protocols=[CBManagerDelegate]): def init(self): self = objc.super(MyCentralManagerDelegate, self).init() if self is None: return None self.centralManager = None return self # This method is called when the central manager's state changes. # It's typically the first delegate method called after initialization. def centralManagerDidUpdateState_(self, central): NSLog("Central Manager did update state: %d", central.state()) # The state is an enum (e.g., CBManagerStatePoweredOn (5), CBManagerStatePoweredOff (4)). # For better readability, you'd map the enum values to human-friendly strings. def main(): delegate = MyCentralManagerDelegate.alloc().init() # CBCentralManager holds a weak reference to its delegate. # Ensure the Python delegate object is not garbage collected for the duration # of the manager's lifecycle. Keeping `delegate` in a local scope like `main` # is sufficient for this quick example. # Initialize the CBCentralManager, passing our delegate. # 'None' for the queue uses the main dispatch queue. manager = CBCentralManager.alloc().initWithDelegate_queue_options_( delegate, None, None ) NSLog("Initialized CBCentralManager. Waiting for state update...") # CoreBluetooth operations are asynchronous and report via delegate methods. # For a console application, you typically need to run a Cocoa event loop # (e.g., using `PyObjCTools.AppHelper.runConsoleEventLoop()` from `pyobjc-tools`) # to process callbacks. For this minimal example, we'll wait briefly to see # the initial state update. import time time.sleep(1) # Give the system a moment to call the delegate NSLog("Quickstart complete. For interactive BLE, use a proper event loop.") if __name__ == "__main__": main()