updated uxplay-beacon python files

Bluetooth_LE_beacon/uxplay-beacon.py

@@ -76,11 +76,16 @@ def start_beacon():
     setup_beacon(ipv4_str, port, advmin, advmax, index)
     advertised_port = beacon_on()
     beacon_is_running = advertised_port is not None
-    if not beacon_is_running:
-        print(f'second attempt to start beacon:')
+    count = 1
+    while  not beacon_is_running:
+        print(f'Failed attempt {count} to start beacon:')
         advertised_port = beacon_on()
         beacon_is_running = advertised_port is not None
-
+        count += 1
+        if count > 5:
+            print(f'Giving up, check Bluetooth adapter')
+            raise SystemExit(1)
+        
 def stop_beacon():
     global beacon_is_running
     global advertised_port
@@ -498,6 +503,14 @@ if __name__ == '__main__':
         advminmax = f'[advmin:advmax]={advmin}:{advmax}'
     if ble_type == bluez:
         indx = f'index {index}'
+    test = None
+    if ble_type == winrt or ble_type == bluez:
+        # initial test to see if Bluetooth is available
+        setup_beacon(ipv4_str, 1, advmin, advmax, index)
+        test = beacon_on()
+        beacon_off()
+    if test is not None:
+        print(f"test passed")
     print(f'AirPlay Service-Discovery Bluetooth LE beacon: BLE file {path} {advminmax} {indx}')
     print(f'Advertising IP address {ipv4_str}')
     print(f'(Press Ctrl+C to exit)')