Binary_sensor template for entity attributes

Hey folks,

I am struggling with pulling an attribute from an entity into a binary sensor.

I have an entity called climate.wiser_office which has an attribute called is_heating which is either true or false.

I want to pull this out into a binary sensor so I can show whether the heating is on or off for a specific room.

I have this so far but its not working.

- platform: template
       friendly_name: "Office Heating State"
       device_class: heat
       value_template: >
         {{ state_attr('climate.wiser_office', 'is_heating')}}

I suspect I need to get the value template correct but struggling to find the correct code.



Please ignore me, it now works!