Merge pull request #210 from peplin/pr/167

Merged and fixed version of #167

samples/subscribe_indicate_thermometer_sample.py

@@ -0,0 +1,60 @@
+"""
+    samples.subscribe_indicate_thermometer_sample
+    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+    This is an example of subscribing to an indicate property of a
+    characteristic. This example was tested with the Health Thermometer Profile,
+    but can be easily modified to work with any other profile.
+"""
+import pygatt
+
+
+def data_handler_cb(handle, value):
+    """
+        Indication and notification come asynchronously, we use this function to
+        handle them either one at the time as they come.
+    :param handle:
+    :param value:
+    :return:
+    """
+    print("Data: {}".format(value.hex()))
+    print("Handle: {}".format(handle))
+
+
+def main():
+    """
+        Main function. The comments below try to explain what each section of
+        the code does.
+    """
+
+    # pygatt uses pexpect and if your device has a long list of characteristics,
+    # pexpect will not catch them all. We increase the search window to
+    # 2048 bytes for the this example. By default, it is 200.
+    # Note: We need an instance of GATToolBackend per each device connection
+    adapter = pygatt.GATTToolBackend(search_window_size=2048)
+
+    try:
+        # Start the adapter
+        adapter.start()
+        # Connect to the device with that given parameter.
+        # For scanning, use adapter.scan()
+        device = adapter.connect("1C:87:74:00:E5:A0")
+        # Set the security level to medium
+        device.bond()
+        # Observes the given characteristics for indications.
+        # When a response is available, calls data_handle_cb
+        device.subscribe("00002a1c-0000-1000-8000-00805f9b34fb",
+                         callback=data_handler_cb,
+                         indication=True)
+
+        input("Press enter to stop program...\n")
+
+    finally:
+        # Stop the adapter session
+        adapter.stop()
+
+    return 0
+
+
+if __name__ == '__main__':
+    exit(main())