I have tried the following template in the Developer Tools - Home Assistant page and it returne fine:
‘{% set mylight = states.light.rpibedroomscreen.attributes.brightness %} {“piscreen”: {“power”: 1, “brightness”: {{ mylight }} }}’
If the light is on and I change the brightness it passes the previous brightness in the value.
/RPi/bedroom/set {“piscreen”: {“power”: 1, “brightness”: 50 }}
no matter what the new value is changed to
If the light is off it passes the null value
/RPi/bedroom/set {“piscreen”: {“power”: 1, “brightness”: }}
How can I get the system to update the brightness before the command and retain brightness when off
- platform: mqtt
schema: template
name: "RPiBedroomScreen"
unique_id: "RPiBedroomScreen"
state_topic: "/RPi/bedroom/status"
state_template: "{{ value_json.data.piscreen.power }}"
value_template: "{{ value_json.data.piscreen.brightness }}"
brightness_template: "{{ value_json.data.piscreen.brightness }}"
command_topic: "/RPi/bedroom/set"
command_off_template: '{"piscreen": {"power":0}}'
command_on_template: '{% set mylight = states.light.rpibedroomscreen.attributes.brightness %} {"piscreen": {"power": 1, "brightness": {{ mylight }} }}'
json_attributes_topic: "/RPi/bedroom/status"
I am still working on it.