Cascade (chain) events on devices of a particular group

[akram]

Hello world,

How can it be possible to create a cascade of events in home assistant for all the entities of a group and trigger them with a push button ?

Here is an example:
I want a push button to start sprinklers in the garden, one sprinkler after another. Each sprinkler is timed autonomously (sonoff mini swithces using tasmota and PulseTime), and they all belong to a group “sprinklers” . I want to start sprinkler-01, but when sprinkler-01 has finished, I want sprinkler-02 to start, and so on until sprinkler-n .

[pniewiadowski (Przemek)]

This is probably not the best idea but I would create n-automation to do this.
First automation to start sprinkler-01, second automation to run sprinkler-02 when sprinkler-01 has change state from “on” to “off” and so on with rest of the sprinklers/automations.

[akram]

@pniewiadowski , yes, this would be the most naïve approach, and would work.
I wanted something more dynamic, so I can also apply it to other automations.

[pniewiadowski (Przemek)]

Then I would go for some python_script. Here is an idea how to use it:

Script sequence with condition state of 1 switch

How about using a single python_script, called easyplus, to serve as a ‘middleman’ for all your scripts? To run a script, instead of running it directly, like this: action: - service: script.dishwasher_turn_on you would call python_script.easyplus and give it the script’s name: action: - service: python_script.easyplus data: script_name: dishwasher_turn_on The easyplus python_script serves as a ‘middleman’ and ensures switch.easyplus is on before executing the sup…

And one more example:

Best way to turn on multiple lights one-by-one

@Terp Here’s a very basic python_script that iterates through a group of lights and turns on each one in sequence with a delay of 15 seconds between each activation. Modify it to suit your needs: sequence.py items = hass.states.get('group.my_lights').attributes['entity_id'] for item in items: service_data = {'entity_id':'{}'.format(item)} hass.services.call('light', 'turn_on', service_data, False) time.sleep(15) The order the lights are activated is based on the order they are li…

I think we can put the while loop to check if current item is still on, if not then go to the next item from the group.

[pniewiadowski (Przemek)]

One more idea. https://opensprinkler.com/

It allows to queue the sprinklers.

[akram]

Sprinklers were just an example. But, actually, there many other usages and scenario.
Python script for this is clearly overkill.