Only overwrite default params if user has passed non-null value

Author: luis-camero

clearpath_generator_robot/clearpath_generator_robot/param/sensors.py

@@ -107,9 +107,12 @@ def __init__(
 
         if 'luxonis_oakd' in self.param_file.parameters:
             luxonis_params = self.param_file.parameters['luxonis_oakd']
-            luxonis_params['camera']['i_ip'] = self.sensor.ip_address
-            luxonis_params['camera']['i_mx_id'] = self.sensor.mx_id
-            luxonis_params['camera']['i_usb_port_id'] = self.sensor.serial
+            if self.sensor.ip_address:
+                luxonis_params['camera']['i_ip'] = self.sensor.ip_address
+            if self.sensor.mx_id:
+                luxonis_params['camera']['i_mx_id'] = self.sensor.mx_id
+            if self.sensor.serial:
+                luxonis_params['camera']['i_usb_port_id'] = self.sensor.serial
             self.param_file.parameters[self.sensor.name] = luxonis_params
             self.param_file.parameters.pop('luxonis_oakd')