target delay parameter and ntp

crazyflie-lib-python @ fee47c6a

-Subproject commit b3ef5eb222f83f71a5d0a6e7ab29965783e51523
+Subproject commit fee47c6a26e7e9bb343ec30400b7d53ae18de43e

salt/drone/init.sls

 include:
+    - drone.install-ntp
     - prrt.python
     - drone.python-libs
     - drone.crazyflie-lib

salt/drone/install-ntp.sls

+ntp:
+    pkg.installed
+
+ntpdate:
+    pkg.installed

salt/drone/scripts/bridge.py

@@ -2,11 +2,9 @@
 
 import sys
 import threading
-
 import signal
 
-from cflib.crtp.serialdriver import SerialDriver
-from cflib.crtp.prrtdriver import PrrtDriver
+import cflib.crtp as crtp
 from cflib.crtp.crtpstack import CRTPPacket, CRTPPort
 
 
@@ -45,15 +43,19 @@ class BackwardBridge(threading.Thread):
 
 
 class Bridge:
-    def __init__(self, crazyflie_driver, crazyflie_uri, client_driver, client_uri):
+    def __init__(self, crazyflie_uri, client_uri):
         print('Initializing Bridge ...')
-        self._crazyflie_connection = crazyflie_driver
         self.crazyflie_uri = crazyflie_uri
-        self._client_connection = client_driver
         self.client_uri = client_uri
 
-        self._crazyflie_connection.connect(crazyflie_uri, None, None)
-        self._client_connection.connect(client_uri, None, None)
+        crtp.init_drivers(enable_debug_driver=False)
+
+        self._crazyflie_connection = crtp.get_link_driver(self.crazyflie_uri, None, None)
+        if not self._crazyflie_connection:
+            raise Exception('No diver found for Crazyflie URI ' + self.crazyflie_uri)
+        self._client_connection = crtp.get_link_driver(self.client_uri, None, None)
+        if not self._client_connection:
+            raise Exception('No diver found for Client URI ' + self.client_uri)
 
         self.forward_thread = None
         self.backward_thread = None
@@ -95,9 +97,9 @@ if __name__ == '__main__':
     serial_uri = 'serial://pi'
     prrt_uri = sys.argv[1]
 
-    bridge = Bridge(SerialDriver(), serial_uri, PrrtDriver(), prrt_uri)
+    bridge = Bridge(serial_uri, prrt_uri)
 
-    bridge.check_for_crazyflie_connection()
+    bridge.check_for_crazyflie_connection()  # optional
     bridge.start()
 
     print('\nSetup finished.\nUse "Ctrl+C" to stop.\n')