{% set connected_devices = state_attr('sensor.redmi_9t_bluetooth_connection', 'connected_paired_devices')[1:-1].split(',') %}
{% set paired_devices = state_attr('sensor.redmi_9t_bluetooth_connection', 'paired_devices')[1:-1].split(',') %}
{% set device_names = {
  'FF:FC:33:54:04:36': 'Høretelefoner',
  'EN_ANDEN_MAC_ADDR': 'En anden lækker enhed'
} %}

{% for device in connected_devices -%}
  {% if device in paired_devices %}
    {{ device_names[device] }} er tilsluttet
  {% elif loop.last %}
    Intet tilsluttet.
  {%- endif %}
{%- endfor %}