Hello!
New day == New AppDaemon automation 
This automation is not final or complete, and probably there is a way to make more generic. My aim is to share examples that maybe can help new members starting with HA+AppDaemon.
Suggestions or recommendations to improve the implementation are welcome!
App #6: Window Alert
Notify me when a window has been open for more than an hour
Note: this example sends only a notification, but other actions can be used like: close automatically the window after one hour.
Entities
binary_sensor.bedroom_window
binary_sensor.kitchen_window
groups.yaml
windows:
name: Windows
view: no
entities:
- binary_sensor.bedroom_window
- binary_sensor..kitchen_window
...
window_alert.yaml
window_alert:
module: window_alert
class: WindowAlert
windows: group.windows
windows_alert.py (Final version)
Thanks @Burningstone for your feedback 
. The final version is 50% shorter than my initial implementation
import appdaemon.plugins.hass.hassapi as hass
class WindowAlert(hass.Hass):
def initialize(self):
self.log('initializing ...')
group = self.get_state(self.args["windows"], attribute = "all")
# get all sensors of the group
sensors = group["attributes"]["entity_id"]
for sensor in sensors:
self.log(f'subscribing to: {sensor}')
self.listen_state(self.on_windows_open, sensor, new= 'on', duration= 3.600)
def on_windows_open(self, entity, attribute, old, new, kwargs):
window_name = self.friendly_name(entity)
self.log(f'Alert! The {window_name} has been open for more than one hour.')
# send your notification
windows_alert.py (Initial version)
import appdaemon.plugins.hass.hassapi as hass
class WindowAlert(hass.Hass):
def initialize(self):
self.log('initializing ...')
self.timers = {}
group = self.get_state(self.args["windows"], attribute = "all")
# get all sensors of the group
sensors = group["attributes"]["entity_id"]
for sensor in sensors:
self.log('subscribing to: ' + str(sensor))
# init timer dictionary, each entry represents a window (name->timer)
self.timers[str(sensor)] = None
self.listen_state(self.on_windows_open, sensor)
def on_windows_open(self, entity, attribute, old, new, kwargs):
self.log('on_windows_open ' + str(entity))
timer_key = str(entity)
friendly_name = self.friendly_name(entity)
if new == "on":
self.log(f'Start timer for {friendly_name}')
self.timers[timer_key] = self.run_in(self.send_notification, 3.600, window= friendly_name, timer= timer_key )
else:
timer = self.timers[timer_key]
if timer != None:
self.log(f'Canceling timer for {friendly_name}')
self.timers[timer_key] = self.cancel_timer(timer)
def send_notification(self, kwargs):
window_name = kwargs["window"]
timer_key = kwargs["timer"]
# forget timer reference
self.timers[timer_key] = None
# send your notification
self.log(f'Alert! The {window_name} has been open for more than one hour.')
Happy coding!
Humberto
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