I’m trying to trigger an automation with a calendar event.
Simple enough eh? But I want it to trigger 30 minutes before the event. Do I need to add the !!-30 and the hashtag to the title on my calendar in order for that to trigger early?
Example. Normally my work calendar says “Work” no it will have to say “#Work !!-30” I suppose if I have to do that I will but man is it ugly haha
I’m actually trying the exact same thing right now, but can’t get it working. As far as I understand the calendar will only swich to on when the event starts. However, it has this offset attribute that will switch to true, depending on the “!!-30” additions in the event title.
I could nog get an automation working using the offset attribute as a trigger. So I’m going to try a template sensor for the attribute.
Would love to hear from someone who can explain exactly how to configure the offset attribute as a automation trigger.
I haven’t worked with the built-in offset settings (!!), but I wanted to have an event that alerts me 15 min before an event ends (so that I’m reminded in time to pick up my son from school). I didn’t have any luck getting this to work as a template trigger, so I created a sensor (with the same template rules), then created an automation that watches the state of that sensor. I ended up creating several sensors that all worked about the same way (various weekly kid school-things), so I set up a sensor for each, then one automation to remind me.
The various Google calendar entities are searches on one calendar.
Here’s my code:
calendar:
- cal_id: [email protected]
entities:
- device_id: nathan_tech_shop
name: Nathan Tech Shop
search: Nate to tech shop
track: true
- device_id: nora_mathcounts
name: Nora MathCounts
search: Nora MathCounts
track: true
- device_id: nora_chessclub
name: Nora Chess Club
search: Nora chess club
track: true
sensor(s) - repeated for each calendar entity. 900sec = 15min. Note that I have a sensor.date__time that keeps the current time. I use that in the sensor so that it updates the value whenever the time changes (every minute).
nate_tech_shop_end:
friendly_name: Tech Shop ends in 15 minutes
entity_id: sensor.date__time
value_template: >
{% if states.calendar.nathan_tech_shop %}
{% if is_state("calendar.nathan_tech_shop", "on") and as_timestamp(states.calendar.nathan_tech_shop.attributes.end_time) - as_timestamp(now()) < 900 %}on{% else %}off{% endif %}
{% else %}off{% endif %}
automation (I used meaningful names in the sensors so that I could just reuse them as part of the notification):
- alias: Time to pick up a kid notification
trigger:
- platform: state
entity_id:
- sensor.nate_tech_shop_end
- sensor.nora_mathcounts_end
- sensor.nora_chess_club_end
state: 'on'
action:
- service: shell_command.speak
data_template:
text: >
{%- for state in states.sensor -%}
{% if state.entity_id == trigger.entity_id -%}
{{ state.attributes.friendly_name | urlencode }}
{%- endif %}
{%- endfor -%}
- service: notify.scott_notifier
data_template:
title: "Time to go!"
message: >
{%- for state in states.sensor -%}
{% if state.entity_id == trigger.entity_id -%}
{{ state.attributes.friendly_name }}
{%- endif %}
{%- endfor -%}
The template sensor worked.
Sensor:
- platform: template
sensors:
work_alarm:
value_template: '{{ states.calendar.work.attributes.offset_reached }}'
friendly_name: 'Work Alarm'
Automation:
- alias: Work
hide_entity: False
trigger:
platform: state
entity_id: sensor.work_alarm
to: 'True'
action:
service: notify.pushbullet
data:
message: Test bericht
title: Gcal
No hashtag needed it seems. I did use the !!-30 in the event title.
@Jer78 has allready done a lot of work on this topic, read this:
https://community.home-assistant.io/t/text-to-speech-notification-to-leave-for-appointment/8689
Wow, thanks for thoroughly laying this out - explains a lot to me that I didn’t quite get. Congrats on having such smart kids too. 
Wow there’s a lot to learn in this link as well! Thanks a lot. Never knew you could do Street Views with the generic camera.
I did find out how to use the offset_reached attribute without a separate template sensor. The key is the attribute state you are looking for is true. No quotes around it. Here is my automation:
- alias: Test Event Notification
trigger:
- platform: template
value_template: "{{ is_state_attr('calendar.home_assistant', 'offset_reached', true) }}"
condition:
- condition: template
value_template: "{{ states.calendar.home_assistant.attributes.message == 'Test Event' }}"
action:
- service: persistent_notification.create
data:
title: "Test Event"
message: "Test Event Notification Triggered"
- service: notify.html5
data:
message: "Test Event Notification Triggered"apparantly !! wont work over 99minutes
I have something wrong somewhere
is it my time_date sensor entity
#calender offset
- platform: time_date
display_options:
- 'date_time'
#more calendar offset time in seconds
- platform: template
sensors:
my_event_offset:
friendly_name: "My Event 120 sec offset"
entity_id: sensor.date_time
value_template: >
{% if states.calendar.my_calendar %}
{% if is_state("calendar.my_calendar", "on") and as_timestamp(states.calendar.my_calendar.attributes.end_time) - as_timestamp(now()) < 120 %}on{% else %}off{% endif %}
{% else %}off{% endif %}