Closes #111 added device tracker package.

packages/Network_monitor

@@ -0,0 +1,34 @@
+################################################################
+## Packages / Network Devices
+################################################################
+
+{% set group = states.group.network_devices -%}
+{%- set templateGroup = 'network_devices_template' -%}
+{%- set entities = group.attributes.entity_id -%}
+group:
+  {{ group.entity_id.split('.')[1] }}:
+    name: "{{ group.name }}"
+    # This is invalid for the group component: hidden: true
+    entities:
+      {% for entity_id in entities -%}
+        - {{ entity_id }}
+      {% endfor %}
+  {{ templateGroup }}:
+    name: "{{ group.name }}"
+    entities:
+      {% for entity_id in entities -%}
+        - {{ ('sensor.' ~ entity_id.split('.')[1] ~ '_template') if entity_id.split('.')[0] == 'device_tracker' else entity_id }}
+      {% endfor %}
+
+{%- set newline = joiner("\n      ") %}
+sensor:
+  - platform: template
+    sensors:
+      {% for entity_id in entities if entity_id.split('.')[0] == 'device_tracker' -%}
+        {{ newline() }}
+        {%- set entity = states[entity_id.split('.')[0]][entity_id.split('.')[1]] -%}
+        {{- entity_id.split('.')[1] }}_template:
+        friendly_name: "{{ entity.name }}"
+        value_template: "{{ '{{' }} 'online' if is_state('{{ entity_id }}', 'home') else 'offline' {{ '}}' }}"
+        icon_template: "{{ '{{' }} 'mdi:check-circle' if is_state('{{ entity_id }}', 'home') else 'mdi:alert-circle' {{ '}}' }}"
+      {% endfor %}