def test_that_the_log_config_is_deleted_on_stop(self):
# Fixture
with patch('cflib.utils.multiranger.LogConfig',
return_value=self.log_config_mock):
sut = Multiranger(self.cf_mock)
sut.start()
# Test
sut.stop()
# Assert
self.log_config_mock.delete.assert_called_once_with()
def test_that_the_log_config_is_deleted_on_stop(self):
# Fixture
with patch('cflib.utils.multiranger.LogConfig',
return_value=self.log_config_mock):
sut = Multiranger(self.cf_mock)
sut.start()
# Test
sut.stop()
# Assert
self.log_config_mock.delete.assert_called_once_with()
def observe(self, goal):
position_now = self.get_position()
track = self.goal_direction(goal, position_now)
distance = np.sqrt(
np.power((goal[0] - position_now[0]), 2) +
np.power((goal[1] - position_now[1]), 2))
distance_sensor = Multiranger(self.scf)
distance_sensor.start()
front_distance_sensor = distance_sensor.front
while front_distance_sensor is None:
time.sleep(0.01)
front_distance_sensor = distance_sensor.front
distance_sensor.stop()
print('Position now = %s ' % position_now)
# print('Track = %s ' % track)
print('Distance to target: %s' % distance)
print('Front distance: %s' % front_distance_sensor)
return position_now[0], position_now[
1], track, distance, front_distance_sensor
class CrazyDrone(Drone):
def __init__(self, link_uri):
super().__init__()
cache = "./cache"
if getattr(sys, 'frozen', False):
cache = sys._MEIPASS + os.path.sep + "cache"
self._cf = Crazyflie(rw_cache=cache)
self.motion_commander = None
self.multiranger = None
# maximum speeds
self.max_vert_speed = 1
self.max_horiz_speed = 1
self.max_rotation_speed = 90
self.logger = None
# Connect some callbacks from the Crazyflie API
self._cf.connected.add_callback(self._connected)
self._cf.disconnected.add_callback(self._disconnected)
self._cf.connection_failed.add_callback(self._connection_failed)
self._cf.connection_lost.add_callback(self._connection_lost)
print('Connecting to %s' % link_uri)
# Try to connect to the Crazyflie
self._cf.open_link(link_uri)
# Variable used to keep main loop occupied until disconnect
self.is_connected = True
def _connected(self, link_uri):
""" This callback is called form the Crazyflie API when a Crazyflie
has been connected and the TOCs have been downloaded."""
print('Connected to %s' % link_uri)
self.connection.emit("progress")
# The definition of the logconfig can be made before connecting
self.logger = LogConfig("Battery", 1000) # delay
self.logger.add_variable("pm.vbat", "float")
try:
self._cf.log.add_config(self.logger)
self.logger.data_received_cb.add_callback(
lambda e, f, g: self.batteryValue.emit(float(f['pm.vbat'])))
# self.logger.error_cb.add_callback(lambda: print('error'))
self.logger.start()
except KeyError as e:
print(e)
self.connection.emit("on")
self.motion_commander = MotionCommander(self._cf, 0.5)
self.multiranger = Multiranger(self._cf, rate_ms=50)
self.multiranger.start()
def _connection_failed(self, link_uri, msg):
"""Callback when connection initial connection fails (i.e no Crazyflie
at the speficied address)"""
print('Connection to %s failed: %s' % (link_uri, msg))
self.is_connected = False
self.connection.emit("off")
def _connection_lost(self, link_uri, msg):
"""Callback when disconnected after a connection has been made (i.e
Crazyflie moves out of range)"""
print('Connection to %s lost: %s' % (link_uri, msg))
self.connection.emit("off")
def _disconnected(self, link_uri):
"""Callback when the Crazyflie is disconnected (called in all cases)"""
print('Disconnected from %s' % link_uri)
self.is_connected = False
self.connection.emit("off")
def take_off(self):
if self._cf.is_connected(
) and self.motion_commander and not self.motion_commander._is_flying:
self.motion_commander.take_off()
self.is_flying_signal.emit(True)
def land(self):
if self._cf.is_connected(
) and self.motion_commander and self.motion_commander._is_flying:
self.motion_commander.land()
self.is_flying_signal.emit(False)
def stop(self):
if not (self.logger is None):
self.logger.stop()
if self.motion_commander:
self.motion_commander.land()
if self.multiranger:
self.multiranger.stop()
self._cf.close_link()
def is_flying(self):
if self._cf.is_connected() and self.motion_commander:
return self.motion_commander._is_flying
return False
def process_motion(self, _up, _rotate, _front, _right):
if self.motion_commander:
# WARNING FOR CRAZYFLY
# positive X is forward, # positive Y is left # positive Z is up
velocity_z = _up * self.max_vert_speed
velocity_yaw = _rotate * self.max_rotation_speed
velocity_x = _front * self.max_horiz_speed
velocity_y = -_right * self.max_horiz_speed
# print("PRE", velocity_x, velocity_y, velocity_z, velocity_yaw)
# protect against collision by reducing speed depending on distance
ranger = self.multiranger
if ranger.front and ranger.front < ANTI_COLLISION_DISTANCE and velocity_x > 0:
velocity_x = velocity_x * (
ranger.front -
ANTI_COLLISION_MIN_DIST) / ANTI_COLLISION_DISTANCE
velocity_x = max(0, velocity_x)
if ranger.back and ranger.back < ANTI_COLLISION_DISTANCE and velocity_x < 0:
velocity_x = velocity_x * (
ranger.back -
ANTI_COLLISION_MIN_DIST) / ANTI_COLLISION_DISTANCE
velocity_x = min(0, velocity_x)
if ranger.left and ranger.left < ANTI_COLLISION_DISTANCE and velocity_y > 0:
velocity_y = velocity_y * (
ranger.left -
ANTI_COLLISION_MIN_DIST) / ANTI_COLLISION_DISTANCE
velocity_y = max(0, velocity_y)
if ranger.right and ranger.right < ANTI_COLLISION_DISTANCE and velocity_y < 0:
velocity_y = velocity_y * (
ranger.left -
ANTI_COLLISION_MIN_DIST) / ANTI_COLLISION_DISTANCE
velocity_y = min(0, velocity_y)
if ranger.up and ranger.up < ANTI_COLLISION_DISTANCE and velocity_z > 0:
velocity_z = velocity_z * (ranger.up - ANTI_COLLISION_MIN_DIST
) / ANTI_COLLISION_DISTANCE
velocity_z = max(0, velocity_z)
# print("POST", velocity_x, velocity_y, velocity_z, velocity_yaw)
if self.motion_commander._is_flying:
self.motion_commander._set_vel_setpoint(
velocity_x, velocity_y, velocity_z, velocity_yaw)