def get_signal(self):
"""get and format DR signal and schedule DR proc."""
time_now = time.mktime(datetime.datetime.now().timetuple())
time_pre = time.mktime(
datetime.datetime.now().replace(hour=settings.pre_cpp_hour,
minute=0,
second=0,
microsecond=0).timetuple())
time_event = time.mktime(datetime.datetime.now().replace(
hour=settings.during_cpp_hour,
minute=12,
second=0,
microsecond=0).timetuple())
time_after = time.mktime(datetime.datetime.now().replace(
hour=settings.after_cpp_hour,
minute=14,
second=0,
microsecond=0).timetuple())
if (settings.signal and time_now < time_pre):
_log.debug("Scheduling1")
time_step = settings.pre_time / 3600
#self.cooling_slope = (self.csp_norm - settings.csp_pre) / ((((time_event - time_pre) / 3600) - 0.5) * time_step)
self.cooling_slope = 1 # for testing use a constant
temp = ((time_event - time_pre) / 3600)
_log.debug("cooling slope: " + repr(self.cooling_slope))
self.schedule(time_pre, sched.Event(self._pre_cpp_timer))
self.schedule(time_event, sched.Event(self._during_cpp_timer))
after_cpp_time = datetime.datetime.now().replace(
hour=settings.after_cpp_hour,
minute=59,
second=0,
microsecond=0)
self.schedule(time_after, sched.Event(self._after_cpp_timer))
#self.start_timer.cancel()
elif (settings.signal and time_now > time_pre
and time_now < time_event):
_log.debug("Scheduling2")
#self.start_timer.cancel()
#self.accel_slope = (self.csp_norm - settings.csp_pre) / ((time_event - time_now) / (3600))
self.accel_slope = 2 #for testing use a constant
#self.cooling_slope = (self.csp_norm - settings.csp_pre) / ((((time_event - time_pre) / 3600) - 0.5) * time_step)
self.cooling_slope = 1 # for testing use a constant
self.schedule(time_event, sched.Event(self._during_cpp_timer))
self.schedule(time_after, sched.Event(self._after_cpp_timer))
self._accelerated_pre_cpp_timer()
elif (settings.signal and time_now > time_event
and time_now < time_after):
_log.debug("Too late to pre-cool!")
#self.start_timer.cancel()
self.schedule(time_after, sched.Event(self._after_cpp_timer))
self._during_cpp()
else:
_log.debug("CPP Event Is Over")
#self.start_timer.cancel()
self._sleep(60)
self.get_signal()
def retry_lock():
def retry_lock_event():
headers = {
headers_mod.CONTENT_TYPE: headers_mod.CONTENT_TYPE.JSON,
'requesterID': agent_id}
self.publish(topics.ACTUATOR_LOCK_ACQUIRE(**rtu_path), headers)
retry_time = datetime.datetime.now() + datetime.timedelta(seconds=5)
if retry_time > e_end:
self.state = 'IDLE'
self.error_handler = None
return
event = sched.Event(retry_lock_event)
self.schedule(retry_time, event)
def get_signal(self):
"""get and format DR signal and schedule DR proc."""
#Pull signal from source
self.__sleep(2) #remove after testing
global csp_norm
global cooling_slope
global accel_slope
time_now = time.mktime(datetime.datetime.now().timetuple())
time_pre = time.mktime(datetime.datetime.now().replace(hour = settings.pre_cpp_hour, minute = 23, second=0, microsecond = 0).timetuple())
time_event = time.mktime(datetime.datetime.now().replace(hour = settings.during_cpp_hour, minute = 25, second = 0, microsecond = 0).timetuple())
time_after = time.mktime(datetime.datetime.now().replace(hour = settings.after_cpp_hour, minute = 27, second = 0, microsecond = 0).timetuple())
if (settings.signal and time_now<time_pre):
_log.debug ("Scheduling1")
time_step = settings.pre_cooling_time/3600
#cooling_slope = (csp_norm-settings.csp_pre)/((((time_event-time_pre)/3600)-0.5)*time_step)
cooling_slope = 1 # for testing use a constant
temp = ((time_event-time_pre)/3600)
_log.debug ("cooling slope: "+ repr(cooling_slope))
pre_cpp_time = datetime.datetime.now().replace(hour = settings.pre_cpp_hour, minute = 23, second = 0, microsecond = 0)
self.schedule(pre_cpp_time, sched.Event(self.__pre_cpp_timer))
during_cpp_time = datetime.datetime.now().replace(hour = settings.during_cpp_hour, minute=25, second = 0, microsecond = 0)
self.schedule(during_cpp_time, sched.Event(self.__during_cpp_timer))
after_cpp_time = datetime.datetime.now().replace(hour = settings.after_cpp_hour, minute = 27, second = 0, microsecond = 0)
self.schedule(after_cpp_time, sched.Event(self.__after_cpp_timer))
#self.start_timer.cancel()
elif(settings.signal and time_now>time_pre and time_now<time_event):
_log.debug("Scheduling2")
#self.start_timer.cancel()
#accel_slope = (csp_norm-settings.csp_pre)/((time_event-time_now)/(3600))
accel_slope = 2 #for testing use a constant
during_cpp_time = datetime.datetime.now().replace(hour = settings.during_cpp_hour, minute = 36, second =20, microsecond = 0)
self.schedule(during_cpp_time, sched.Event(self.__during_cpp_timer))
after_cpp_time = datetime.datetime.now().replace(hour = settings.after_cpp_hour, minute = 39, second = 10, microsecond = 0)
self.schedule(after_cpp_time, sched.Event(self.__after_cpp_timer))
self.__accelerated_pre_cpp_timer()
elif(settings.signal and time_now>time_event and time_now<time_after):
_log.debug("Too late to pre-cool!")
#self.start_timer.cancel()
after_cpp_time = datetime.datetime.now().replace(hour=settings.after_cpp_hour, minute = 17, second = 0, microsecond = 0)
self.schedule(after_cpp_time, sched.Event(self.__after_cpp_timer))
self.tasklet = greenlet.greenlet(self.__during_cpp)
self.tasklet.switch()
else:
_log.debug("CPP Event Is Over")
#self.start_timer.cancel()
self.__sleep(60)
self.get_signal()
def get_signal(self):
#Pull signal from source
time_now=time.mktime(datetime.datetime.now().timetuple())
time_pre=time.mktime(datetime.datetime.now().replace(hour=settings.pre_cpp_hour,minute=0,second=0, microsecond=0).timetuple())
time_event=time.mktime(datetime.datetime.now().replace(hour=settings.during_cpp_hour,minute=51,second=0, microsecond=0).timetuple())
time_after=time.mktime(datetime.datetime.now().replace(hour=settings.after_cpp_hour,minute=54,second=0, microsecond=0).timetuple())
print(time_now)
print(time_event)
#PULL NORMAL COOLING SETPOINT
csp_normal=settings.csp_norm
if (settings.signal and time_now<time_pre):
print ("Scheduling")
pre_cpp_time=datetime.datetime.now().replace(hour=settings.pre_cpp_hour,minute=25,second=10, microsecond=0)
self.schedule(pre_cpp_time,sched.Event(self.pre_cpp_timer, (csp_normal,)))
during_cpp_time=datetime.datetime.now().replace(hour=settings.during_cpp_hour,minute=26,second=20, microsecond=0)
self.schedule(during_cpp_time,sched.Event(self.during_cpp))
after_cpp_time=datetime.datetime.now().replace(hour=settings.after_cpp_hour,minute=27,second=30, microsecond=0)
self.schedule(after_cpp_time,sched.Event(self.after_cpp_timer, (csp_normal,)))
self.start_timer.cancel()
elif(settings.signal and time_now>time_pre and time_now<time_event):
print("Scheduling")
self.start_timer.cancel()
pre_slope=(time_event-time_now)/(3600)
during_cpp_time=datetime.datetime.now().replace(hour=settings.during_cpp_hour,minute=46,second=20, microsecond=0)
self.schedule(during_cpp_time,sched.Event(self.during_cpp))
after_cpp_time=datetime.datetime.now().replace(hour=settings.after_cpp_hour,minute=47,second=10, microsecond=0)
self.schedule(after_cpp_time,sched.Event(self.after_cpp_timer, (csp_normal,)))
self.accelerated_pre_cooling_timer(pre_slope,csp_normal)
elif(settings.signal and time_now>time_event and time_now<time_after):
print("Too late to pre-cool!")
self.start_timer.cancel()
after_cpp_time=datetime.datetime.now().replace(hour=settings.after_cpp_hour,minute=54,second=10, microsecond=0)
self.schedule(after_cpp_time,sched.Event(self.after_cpp_timer, (csp_normal,)))
self.during_cpp()
print("CPP Event Missed")
self.setup()
def schedule_builder(self,start_time, end_time,
current_spacetemp,
pre_csp,
building_thermal_constant,
normal_coolingstpt,
timestep_length,
dr_csp):
"""schedule all events for a DR event."""
current_time = time.time()
if current_time > end_time:
return
_log.debug('Scheduling all DR actions')
pre_hsp = pre_csp - 5.0
ideal_cooling_window = int(((current_spacetemp - pre_csp)/building_thermal_constant) *3600)
ideal_precool_start_time = start_time - ideal_cooling_window
max_cooling_window = start_time - current_time
cooling_window = ideal_cooling_window if ideal_cooling_window < max_cooling_window else max_cooling_window
precool_start_time = start_time - cooling_window
pre_cool_step = 0
if (max_cooling_window > 0):
_log.debug('Schedule Pre Cooling')
num_cooling_timesteps = int(math.ceil(float(cooling_window) / float(timestep_length)))
cooling_step_delta = (normal_coolingstpt - pre_csp) / num_cooling_timesteps
if num_cooling_timesteps <= 0:
num_cooling_timesteps=1
for step_index in range (1, num_cooling_timesteps):
if step_index == 1:
pre_cool_step = 2*timestep_length
else:
pre_cool_step += timestep_length
event_time = start_time - pre_cool_step
csp = pre_csp + ((step_index-1) * cooling_step_delta)
_log.debug('Precool step: '+ str(datetime.datetime.fromtimestamp(event_time)) + ' CSP: ' + str(csp))
event = sched.Event(self.modify_temp_set_point, args = [csp, pre_hsp])
self.schedule(event_time, event)
self.currently_running_dr_event_handlers.append(event)
else:
_log.debug('Too late to pre-cool!')
restore_window = int(((dr_csp - normal_coolingstpt)/building_thermal_constant) *3600)
restore_start_time = end_time
num_restore_timesteps = int(math.ceil(float(restore_window) / float(timestep_length)))
restore_step_delta = (dr_csp - normal_coolingstpt) / num_restore_timesteps
_log.debug('Schedule DR Event: ' + str(datetime.datetime.fromtimestamp(start_time)) +' CSP: ' + str(dr_csp))
event = sched.Event(self.start_dr_event)
self.schedule(start_time, event)
self.currently_running_dr_event_handlers.append(event)
_log.debug('Schedule Restore Event: '+ str(datetime.datetime.fromtimestamp(end_time)) + ' CSP: ' + str(dr_csp-restore_step_delta))
event = sched.Event(self.start_restore_event, args = [dr_csp-restore_step_delta, self.normal_heatingstpt])
self.schedule(end_time, event)
self.currently_running_dr_event_handlers.append(event)
for step_index in range (1, num_restore_timesteps):
event_time = end_time + (step_index * timestep_length)
csp = dr_csp - ((step_index + 1) * restore_step_delta)
_log.debug('Restore step: ' + str(datetime.datetime.fromtimestamp(event_time)) +' CSP: ' + str(csp))
event = sched.Event(self.modify_temp_set_point, args = [csp, self.normal_heatingstpt])
self.schedule(event_time, event)
self.currently_running_dr_event_handlers.append(event)
event_time = end_time + (num_restore_timesteps * timestep_length)
_log.debug('Schedule Cleanup Event: ' + str(datetime.datetime.fromtimestamp(event_time)))
event = sched.Event(self.cancel_event)
self.schedule(event_time,event)
self.currently_running_dr_event_handlers.append(event)
def cancel_event(self, cancel_type='NORMAL'):
if cancel_type == 'OVERRIDE':
self.state = 'OVERRIDE'
smap_input = 3.0
elif cancel_type != 'UPDATING':
self.state = 'CLEANUP'
smap_input = 2.0
self.publish(topics.ACTUATOR_SET(point=cooling_stpt, **rtu_path), self.headers, str(self.normal_coolingstpt))
self.publish(topics.ACTUATOR_SET(point=heating_stpt, **rtu_path), self.headers, str(self.normal_heatingstpt))
self.publish(topics.ACTUATOR_SET(point=cooling_fan_sp1, **rtu_path), self.headers, str(self.normal_firststage_fanspeed))
self.publish(topics.ACTUATOR_SET(point=cooling_fan_sp2, **rtu_path), self.headers, str(self.normal_secondstage_fanspeed))
self.publish(topics.ACTUATOR_SET(point=min_damper_stpt, **rtu_path), self.headers, str(self.normal_damper_stpt))
self.publish(topics.ACTUATOR_SET(point=cooling_stage_diff, **rtu_path), self.headers, str(self.default_cooling_stage_differential))
self.publish(topics.ACTUATOR_SET(point=volttron_flag, **rtu_path), self.headers,str( 0))
for event in self.currently_running_dr_event_handlers:
event.cancel()
if cancel_type != 'UPDATING':
mytime = int(time.time())
content = {
"Demand Response Event": {
"Readings": [[mytime, smap_input]],
"Units": "TU",
"data_type": "double"
}
}
self.publish(self.smap_path, self.headers, jsonapi.dumps(content))
self.currently_running_dr_event_handlers = []
def backup_run():
self.cancel_event()
self.lock_handler=None
self.lock_handler = backup_run
expected_values = {cooling_stpt: self.normal_coolingstpt,
heating_stpt: self.normal_heatingstpt,
cooling_fan_sp1: self.normal_firststage_fanspeed,
cooling_fan_sp2: self.normal_secondstage_fanspeed,
min_damper_stpt: self.normal_damper_stpt,
cooling_stage_diff: self.default_cooling_stage_differential}
EPSILON = 0.5 #allowed difference from expected value
def result_handler(point, value):
#print "actuator point being handled:", point, value
expected_value = expected_values.pop(point, None)
if expected_value is not None:
diff = abs(expected_value-value)
if diff > EPSILON:
_log.debug( "Did not get back expected value for: " + str(point))
if not expected_values:
self.actuator_handler = None
self.lock_handler=None
self.error_handler = None
self.state = 'IDLE' if not cancel_type == 'OVERRIDE' else 'OVERRIDE'
headers = {
headers_mod.CONTENT_TYPE: headers_mod.CONTENT_TYPE.JSON,
'requesterID': agent_id}
self.publish(topics.ACTUATOR_LOCK_RELEASE(**rtu_path), headers)
if cancel_type != 'UPDATING':
self.actuator_handler = result_handler
else:
self.actuator_handler = None
self.lock_handler=None
if cancel_type == 'OVERRIDE':
def on_reset():
self.error_handler = None
self.state = 'IDLE'
today = datetime.datetime.now()
reset_time = today + datetime.timedelta(days=1)
reset_time = reset_time.replace(hour=0, minute =0, second = 0)
event = sched.Event(on_reset)
self.schedule(reset_time, event)
def pre_cool_get_lock(self, e_start, e_end):
if self.state == 'OVERRIDE':
_log.debug("Override today")
return
if self.pre_cool_idle == False:
return
now = datetime.datetime.now()
day=now.weekday()
if not schedule[day]:
_log.debug("Unoccupied today")
return
if self.state == 'PRECOOL' and self.pre_cool_idle == True:
for event in self.currently_running_dr_event_handlers:
event.cancel()
self.all_scheduled_events = {}
self.state = 'PRECOOL'
e_start_unix = time.mktime(e_start.timetuple())
e_end_unix = time.mktime(e_end.timetuple())
if self.pre_cool_idle == True:
event_start = now + datetime.timedelta(minutes=15)
event = sched.Event(self.pre_cool_get_lock, args=[self.e_start, self.e_end])
self.schedule(event_start, event)
self.all_scheduled_events[e_start] = event
self.pre_cool_idle = True
self.schedule_builder(e_start_unix, e_end_unix,
current_spacetemp=self.current_spacetemp,
pre_csp=csp_pre,
building_thermal_constant=building_thermal_constant,
normal_coolingstpt=self.normal_coolingstpt,
timestep_length=timestep_length,
dr_csp=csp_cpp)
else:
event_start = now + datetime.timedelta(minutes=15)
event = sched.Event(self.pre_cool_get_lock, args=[self.e_start, self.e_end])
self.schedule(event_start, event)
self.all_scheduled_events[e_start] = event
self.pre_cool_idle = True
def run_schedule_builder():
self.schedule_builder(e_start_unix, e_end_unix,
current_spacetemp=self.current_spacetemp,
pre_csp=csp_pre,
building_thermal_constant=building_thermal_constant,
normal_coolingstpt=self.normal_coolingstpt,
timestep_length=timestep_length,
dr_csp=csp_cpp)
self.lock_handler=None
self.lock_handler = run_schedule_builder
headers = {
headers_mod.CONTENT_TYPE: headers_mod.CONTENT_TYPE.JSON,
'requesterID': agent_id}
self.publish(topics.ACTUATOR_LOCK_ACQUIRE(**rtu_path), headers)
def retry_lock():
def retry_lock_event():
headers = {
headers_mod.CONTENT_TYPE: headers_mod.CONTENT_TYPE.JSON,
'requesterID': agent_id}
self.publish(topics.ACTUATOR_LOCK_ACQUIRE(**rtu_path), headers)
retry_time = datetime.datetime.now() + datetime.timedelta(seconds=5)
if retry_time > e_end:
self.state = 'IDLE'
self.error_handler = None
return
event = sched.Event(retry_lock_event)
self.schedule(retry_time, event)
self.error_handler = retry_lock
def _on_dr_event(self, topic, headers, message, match):
if self.state == 'STARTUP':
_log.debug('DR event ignored because of startup.')
return
"""handle openADR events"""
msg = jsonapi.loads(message[0])
_log.debug('EVENT Received: ' + str(msg))
e_id = msg['id']
e_status = msg['status']
e_start = msg['start_at']
#e_start = datetime.datetime.strptime(e_start, datefmt)
today = datetime.datetime.now().date()
e_end = msg['end_at']
e_end = parser.parse(e_end, fuzzy=True)
e_start = parser.parse(e_start, fuzzy=True)
#e_end = datetime.datetime.strptime(e_end, datefmt)
current_datetime = datetime.datetime.now()
#For UTC offset
#offset= datetime.datetime.utcnow() - datetime.datetime.now()
#e_end = e_end - offset
#e_start = e_start - offset
if current_datetime > e_end:
_log.debug('Too Late Event is Over')
return
if e_status == 'cancelled':
if e_start in self.all_scheduled_events:
_log.debug('Event Cancelled')
self.all_scheduled_events[e_start].cancel()
del self.all_scheduled_events[e_start]
if e_start.date() == today and (self.state == 'PRECOOL' or self.state == 'DR_EVENT'):
self.cancel_event()
return
if today > e_start.date():
if e_start in self.all_scheduled_events:
self.all_scheduled_events[e_start].cancel()
del self.all_scheduled_events[e_start]
return
for item in self.all_scheduled_events.keys():
if e_start.date() == item.date():
if e_start.time() != item.time():
_log.debug( 'Updating Event')
self.all_scheduled_events[item].cancel()
del self.all_scheduled_events[item]
if e_start.date() == today and (self.state == 'PRECOOL' or self.state == 'DR_EVENT'):
self.cancel_event(cancel_type='UPDATING')
break
elif e_start.time() == item.time():
_log.debug("same event")
return
#Don't schedule an event if we are currently in OVERRIDE state.
if e_start.date() == today and (self.state == 'OVERRIDE'):
return
self.e_start = e_start
self.e_end = e_end
event_start = e_start - datetime.timedelta(hours = max_precool_hours)
event = sched.Event(self.pre_cool_get_lock, args=[self.e_start, self.e_end])
self.schedule(event_start, event)
self.all_scheduled_events[e_start] = event
def schedule_builder(self,start_time, end_time,
current_spacetemp,
pre_csp,
building_thermal_constant,
normal_coolingstpt,
timestep_length,
dr_csp):
"""schedule all events for a DR event."""
print 'Scheduling all DR actions'
pre_hsp = pre_csp - 5.0
current_time = time.time()
ideal_cooling_window = int(((current_spacetemp - pre_csp)/building_thermal_constant) *3600)
ideal_precool_start_time = start_time - ideal_cooling_window
max_cooling_window = start_time - current_time
cooling_window = ideal_cooling_window if ideal_cooling_window < max_cooling_window else max_cooling_window
precool_start_time = start_time - cooling_window
if (max_cooling_window > 0):
print "Schedule Pre Cooling"
num_cooling_timesteps = int(math.ceil(float(cooling_window) / float(timestep_length)))
cooling_step_delta = (normal_coolingstpt - pre_csp) / num_cooling_timesteps
for step_index in range (1, num_cooling_timesteps+1):
event_time = start_time - (step_index * timestep_length)
csp = pre_csp + ((step_index-1)*cooling_step_delta)
print 'Precool step:', datetime.datetime.fromtimestamp(event_time), csp
event = sched.Event(self.modify_temp_set_point, args = [csp, pre_hsp])
self.schedule(event_time, event)
self.currently_running_dr_event_handlers.append(event)
else:
print "Too late to pre-cool!"
restore_window = int(((dr_csp - normal_coolingstpt)/building_thermal_constant) *3600)
restore_start_time = end_time
num_restore_timesteps = int(math.ceil(float(restore_window) / float(timestep_length)))
restore_step_delta = (dr_csp - normal_coolingstpt) / num_restore_timesteps
print 'Schedule DR Event:', datetime.datetime.fromtimestamp(start_time), dr_csp
event = sched.Event(self.start_dr_event)
self.schedule(start_time, event)
self.currently_running_dr_event_handlers.append(event)
print 'Schedule Restore Event:', datetime.datetime.fromtimestamp(end_time), dr_csp-restore_step_delta
event = sched.Event(self.start_restore_event, args = [dr_csp-restore_step_delta, self.default_heatingstpt])
self.schedule(end_time, event)
self.currently_running_dr_event_handlers.append(event)
for step_index in range (1, num_restore_timesteps):
event_time = end_time + (step_index * timestep_length)
csp = dr_csp - ((step_index + 1) * restore_step_delta)
print 'Restore step:', datetime.datetime.fromtimestamp(event_time), csp
event = sched.Event(self.modify_temp_set_point, args = [csp, self.default_heatingstpt])
self.schedule(event_time, event)
self.currently_running_dr_event_handlers.append(event)
event_time = end_time + (num_restore_timesteps * timestep_length)
print 'Schedule Cleanup Event:', datetime.datetime.fromtimestamp(event_time)
event = sched.Event(self.cancel_event)
self.schedule(event_time,event)
self.currently_running_dr_event_handlers.append(event)
def _on_dr_event(self, topic, headers, message, match):
if self.state == 'STARTUP':
print "DR event ignored because of startup."
return
"""handle openADR events"""
msg = jsonapi.loads(message[0])
print('EVENT Received')
print(msg)
e_id = msg['id']
e_status = msg['status']
e_start = msg['start']
e_start = datetime.datetime.strptime(e_start, datefmt)
today = datetime.datetime.now().date()
#e_start_day = e_start.date()
#e_end = e_start.replace(hour=cpp_end_hour, minute =0, second = 0)
current_datetime = datetime.datetime.now()
e_end = e_start + datetime.timedelta(minutes=2)
if current_datetime > e_end:
print 'Too Late Event is Over'
return
if e_status == 'cancelled':
if e_start in self.all_scheduled_events:
print 'Event Cancelled'
self.all_scheduled_events[e_start].cancel()
del self.all_scheduled_events[e_start]
if e_start.date() == today and (self.state == 'PRECOOL' or self.state == 'DR_EVENT'):
self.cancel_event()
return
#TODO: change this to UTC later
#utc_now = datetime.datetime.utcnow()
if today > e_start.date():
if e_start in self.all_scheduled_events:
self.all_scheduled_events[e_start].cancel()
del self.all_scheduled_events[e_start]
return
for item in self.all_scheduled_events.keys():
if e_start.date() == item.date():
if e_start.time() != item.time():
print "Updating Event"
self.all_scheduled_events[item].cancel()
del self.all_scheduled_events[item]
if e_start.date() == today and (self.state == 'PRECOOL' or self.state == 'DR_EVENT'):
self.update_running_event()
self.state = 'IDLE'
break
elif e_start.time() == item.time():
print "same event"
return
#if e_id in self.all_scheduled_dr_events and update is None:
# if e_id == self.currently_running_msg:
# return
#return
#Minutes used for testing
#event_start = e_start - datetime.timedelta(hours = max_precool_hours)
event_start = e_start - datetime.timedelta(minutes = max_precool_hours)
event = sched.Event(self.pre_cool_get_lock, args=[e_start, e_end])
self.schedule(event_start, event)
self.all_scheduled_events[e_start] = event
