I did templates with mine. I included a sensors directory in the configuration.yaml and put templates.yaml in that folder.
sensor: !include_dir_list sensors
Here’s how I addressed the envisalink devices in templates.yaml and changed their state. The else statement is important otherwise it’ll generate errors in the log on startup. They don’t stop it from working I just don’t like false alarms. 
platform: template
sensors:
front_door:
value_template: >-
{% if states.binary_sensor.front_door.state == 'on' %}
Open
{% elif states.binary_sensor.front_door.state == 'off' %}
Closed
{% else %}
n/a
{% endif %}
patio_door:
value_template: >-
{% if states.binary_sensor.patio_door.state == 'on' %}
Open
{% elif states.binary_sensor.patio_door.state == 'off' %}
Closed
{% else %}
n/a
{% endif %}
house_garage_door:
value_template: >-
{% if states.binary_sensor.house_garage_door.state == 'on' %}
Open
{% elif states.binary_sensor.house_garage_door.state == 'off' %}
Closed
{% else %}
n/a
{% endif %}
back_garage_door:
value_template: >-
{% if states.binary_sensor.back_garage_door.state == 'on' %}
Open
{% elif states.binary_sensor.back_garage_door.state == 'off' %}
Closed
{% else %}
n/a
{% endif %}
basement_smoke:
value_template: >-
{% if states.binary_sensor.basement_smoke.state == 'on' %}
Smoke Detected!
{% elif states.binary_sensor.basement_smoke.state == 'off' %}
OK
{% else %}
n/a
{% endif %}
first_floor_smoke:
value_template: >-
{% if states.binary_sensor.first_floor_smoke.state == 'on' %}
Smoke Detected!
{% elif states.binary_sensor.first_floor_smoke.state == 'off' %}
OK
{% else %}
n/a
{% endif %}
second_floor_smoke:
value_template: >-
{% if states.binary_sensor.second_floor_smoke.state == 'on' %}
Smoke Detected!
{% elif states.binary_sensor.second_floor_smoke.state == 'off' %}
OK
{% else %}
n/a
{% endif %}
kitchen_motion:
value_template: >-
{% if states.binary_sensor.kitchen_motion.state == 'on' %}
Motion Detected!
{% elif states.binary_sensor.kitchen_motion.state == 'off' %}
OK
{% else %}
n/a
{% endif %}
high_water:
value_template: >-
{% if states.binary_sensor.high_water.state == 'on' %}
Water Detected!
{% elif states.binary_sensor.high_water.state == 'off' %}
OK
{% else %}
n/a
{% endif %}
low_temp:
value_template: >-
{% if states.binary_sensor.low_temp.state == 'on' %}
Low Temp Detected!
{% elif states.binary_sensor.low_temp.state == 'off' %}
OK
{% else %}
n/a
{% endif %}