I’m trying to make an (my first) automation to notify users of high sensor values. I intend to use this for CO2, and later also PM2.5/PM10 etc.
I like the idea of automations (to reduce duplicate code), but I have some difficulty with getting sensor properties. Can somebody point me in the right direction?
I currently have the below start, but I need help on generating the message dynamically, the variables don’t work at the moment. I looked for existing blueprints and searched the homeassistant docs (e.g. on sensors), but I couldn’t find the syntax to query entity properties properly.
blueprint:
name: High sensor value detection
description: Notify users of high sensor value detection (e.g. CO2, temp, PM2.5)
domain: automation
input:
trigger_sensor:
name: Sensor
description: Sensor to trigger on
selector:
entity:
domain: sensor
trigger_level:
name: Trigger level
description: Sensor value to trigger at
selector:
input_number:
box1:
name: Trigger value
initial: 1250
mode: box
notify_message:
name: Notification Message
description: 'Default: " {{ sensor_quantity }} in {{ sensor_location }} is above {{ trigger_level }} {{ sensor_unit }}"'
default: " {{ sensor_quantity }} in {{ sensor_location }} is above {{ trigger_level }} {{ sensor_unit }} "
alias: High sensor detection
description: Notify users when high sensor values are detected somewhere
trigger:
- platform: numeric_state
entity_id: !input "trigger_sensor"
above: !input "trigger_level"
variables:
# these don't work yet:
sensor_quantity: "{{ states[trigger_sensor.entity_id].device_class }}"
sensor_location: "{{ states[trigger_sensor.entity_id].location }}"
sensor_unit: "{{ states[trigger_sensor.entity_id].unit_of_measurement }}"
condition: []
action:
- service: notify.notify
data:
message: !input "notify_message"
mode: single
Thanks @pedolsky for the quick reply! With your input and debugging a bit in Developer Tools->Template, I now have the below code
I still have a few questions I hope somebody can help with:
How can I get the area a sensor is in and the quantity/device_class? I don’t see this in attributes or state fields, but Homeassistant knows. Update: my ESPHome CO2 sensor does not have a .device_class attribute, but Homeassistant knows it has to use a CO2 icon. Where is this info stored?
Nice to have: I now use trigger_sensor_var as intermediate variable, can I refer/use blueprint inputs directly?
blueprint:
name: High sensor value detection
description: Notify users of high sensor value detection (e.g. CO2, temp, PM2.5)
domain: automation
input:
trigger_sensor:
name: Sensor
description: Sensor to trigger on
selector:
entity:
domain: sensor
trigger_level:
name: Trigger level
description: Sensor value to trigger at
selector:
number:
mode: box
min: -50
max: 1250
notify_message:
name: Notification Message
description: 'Default: " {{ sensor_quantity }} in {{ sensor_location }} is above {{ trigger_level_var }} {{ sensor_unit }}"'
default: " {{ sensor_quantity }} in {{ sensor_location }} is above {{ trigger_level_var }} {{ sensor_unit }} "
alias: High sensor detection
description: Notify users when high sensor values are detected somewhere
trigger:
- platform: numeric_state
entity_id: !input "trigger_sensor"
above: !input "trigger_level"
variables:
trigger_sensor_var: !input "trigger_sensor"
trigger_level_var: !input "trigger_level"
sensor_quantity: " "
# {{ state_attr(trigger_sensor, 'unit_of_measurement') }}"
sensor_location: "debug_sensor_location"
#{{ states[trigger_sensor_var.entity_id].attributes.location }}"
sensor_unit: "debug_sensor_unit {{ state_attr(trigger_sensor_var, 'unit_of_measurement') }}"
condition: []
action:
- service: notify.notify
data:
message: !input "notify_message"
mode: single
