DoorControl/door_pi_control/door/control.py

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from datetime import datetime
import os
from threading import Lock, RLock, Condition, Thread
from .communication import Communication
from .. import util
from .. import mqtt
from .constants import state_names, state
from . import constants
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import sys
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class Control(util.Loggable):
def __init__(self, config, mqtt_client=None):
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super().__init__("door")
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self._config = config
self._mutex = RLock()
self._control_update = Condition(self._mutex)
self._comms = Communication(config.serial_port)
self._position_task: Thread = None
self._control_task: Thread = None
self.target = mqtt.Value(mqtt_client, "door/state/target",
persistent=True,
translate=state_names)
self.state = mqtt.Value(mqtt_client, "door/state/value",
persistent=True,
translate=state_names)
self.position = mqtt.Value(mqtt_client, "door/position/value",
persistent=True)
self._speed = 0
self._started = False
self._stop = False
self._idle = True
def _run_position(self):
cond = Condition(self._mutex)
warned = False
def update_position(_, line):
p, s = map(int, line.split())
with cond:
if p != self.position():
self._logger().debug(f"Position: {p}, {s}")
self.position(p)
self._speed = s
cond.notify()
self._comms.subscribe("pos", update_position)
last_update = datetime.now()
last_movement = datetime.now()
while True:
with cond:
if self._stop:
return
if not cond.wait(5):
self._comms.cmd_report()
dt = (datetime.now() - last_update).total_seconds()
if dt > 10 and not warned:
warned = True
self._logger().warn(f"No position for {dt} seconds")
else:
last_update = datetime.now()
warned = False
if self._speed != 0:
last_movement = datetime.now()
mov_dt = (datetime.now() - last_movement).total_seconds()
if mov_dt > constants.MIN_IDLE_TIME:
if self.position() < constants.CLOSED_THRESHOLD:
self.state(state.CLOSE)
self._control_update.notify()
elif self.position() > constants.ERROR_THRESHOLD:
self.state(state.ERROR)
self._control_update.notify()
elif self.position() > constants.OPEN_THRESHOLD:
self.state(state.OPEN)
self._control_update.notify()
elif not self._idle:
self._control_update.notify()
self._idle = True
else:
self._idle = False
def _run_control(self):
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# Not controlling the lock
controlling = False
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cmd = {
state.RESTART: self._comms.cmd_restart,
state.OPEN: self._comms.cmd_open,
state.OPEN_THEN_CLOSE: self._comms.cmd_open,
state.CLOSE: self._comms.cmd_close,
state.CLOSE_THEN_OPEN: self._comms.cmd_close,
}
with self._control_update:
last_target = state.IDLE
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last_state = None
action = None
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# When starting, reset the MCU once
self.target(state.CLOSE)
# Starting time of the current action
start_time = datetime.now()
timeouts = 0
while not self._stop:
# Wait for an update
self._control_update.wait(1)
if not self._idle:
# If still moving, continue
self._logger().debug(f"Not idle")
continue
# Update was that the target has changed
if self.target() != last_target:
self._logger().debug(f"Target update: {state_names[self.target()]}")
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action = cmd.get(self.target(), None)
last_action = cmd.get(last_target, None)
if action != None and last_action != action:
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# We need to send a different command for this
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self._logger().debug(f"Calling {action}")
action()
elif action == last_action:
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self._logger().debug(f"Same command as {state_names[last_target]}")
# Update last known target and starting time
last_target = self.target()
start_time = datetime.now()
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if self.state() != last_state:
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# State from position handling differs from last known state
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self._logger().debug(f"State update, target is {state_names[self.target()]}")
last_state = self.state()
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self._logger().info("Reached state "
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f"{state_names.get(last_state, last_state)}")
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if action == None and self.state() != state.ERROR:
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self._logger().info("Probably somebody using the key")
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self.target(last_state)
last_target = last_state
elif last_state == last_target:
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# Reached target
timeouts = 0
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self._logger().debug("Target reached")
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if last_target == state.CLOSE \
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and self.position() > constants.CLOSED_WANT:
self._logger().info(
f"Position is {self.position()}, "
"closing some more")
self._comms.cmd_close()
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controlling = False
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action = None
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elif self.state() == state.ERROR:
# Position too high, restart
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self._logger().debug("Error")
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self._comm.cmd_restart()
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sleep(5)
self._comm.cmd_close()
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sleep(1)
sys.exit(1)
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else:
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self._logger().debug("Reached wrong state")
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if timeouts < 3:
timeouts += 1
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if self.target() == last_target:
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# Initially, switch to the other one
# and execute that
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self._logger().debug("Switching targets")
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last_target = {
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state.CLOSE: state.OPEN_THEN_CLOSE,
state.OPEN: state.CLOSE_THEN_OPEN
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}.get(last_target, state.RESTART)
cmd[last_target]()
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else:
# Then go back
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self._logger().debug("Going back to actual target")
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last_target = self.target()
cmd[last_target]()
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else:
# Tried too often, restart
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self._logger().debug("Something's wrong")
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self.target(state.RESTART)
def start(self):
with self._mutex:
if not self._started:
self._started = True
self._stop = False
self._comms.start()
self._position_task = Thread(target=self._run_position,
daemon=True)
self._control_task = Thread(target=self._run_control,
daemon=True)
self._position_task.start()
self._control_task.start()
def stop(self):
with self._mutex:
if self._started:
self._started = False
self._stop = True
self._comms.stop()
self._mutex.release()
self._position_task.join()
self._control_task.join()
def open(self):
with self._mutex:
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self._logger().info("Opening")
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self.target(state.OPEN)
self._control_update.notify()
def close(self):
with self._mutex:
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self._logger().info("Closing")
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self.target(state.CLOSE)
self._control_update.notify()
def toggle(self):
with self._mutex:
self._logger().debug("Asked to toggle")
if self.target() == state.OPEN:
self.close()
else:
self.open()
def state(self):
with self._mutex:
return self._state