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source/_cookbook/restart_ha_if_wemo_switch_is_not_detected.markdown

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+---
+layout: page
+title: "Restart Home Assistant if Wemo Switch is not detected"
+description: "Restart Home Assistant if Wemo Switch is not detected."
+date: 2016-01-29 08:00
+sidebar: false
+comments: false
+sharing: true
+footer: true
+---
+
+### {% linkable_title Restart Home Assistant %}
+
+This configuration example is restarting Home Assistant if a [WeMo](/components/switch.wemo/) switch is not detected. An additional MQTT switch is present for stopping Home Assistant and can be triggered by [IFTTT](/components/ifttt/). The running batch script will automatically restart Home Assistant if the process isn't found anymore.
+
+```yaml
+mqtt:
+  broker: 127.0.0.1
+  port: 1883
+  client_id: home-assistant-1
+  keepalive: 60
+  
+device_tracker:
+  - platform: nmap_tracker
+    hosts: 192.168.0.1-255
+    home_interval: 1
+    interval_seconds: 30
+    consider_home: 900
+    
+ifttt:
+  key: ***
+  
+notify: 
+  - platform: pushbullet
+    api_key: ***
+    name: pushbullet
+  
+switch:
+  - platform: wemo
+  - platform: mqtt
+    state_topic: "home/killhass"
+    command_topic: "home/killhass"
+    name: "KillHass"
+    qos: 0
+    payload_on: "ON"
+    payload_of: "OFF"
+    optimistic: false
+
+script:
+  restarthawemo:
+    alias: "Restart HA if WeMo isn't found after 15 minutes"
+    sequence:
+      - delay:
+          minutes: 15
+      - execute_service: notify.pushbullet
+        service_data:
+          message: 'WeMo not found, restarting HA'
+      - execute_service: switch.turn_on
+        service_data:
+          entity_id: switch.killhass
+  
+automation:
+  - alias: "Restart HA if WeMo switch isn't found after 15 minutes"
+  trigger:
+    platform: state
+    entity_id: device_tracker.wemo
+    from: 'not_home'
+    to: 'home'
+  condition:
+    - platform: template
+      value_template: {% raw %}'{% if states.switch.wemo %}false{% else %}true{% endif %}'{% endraw %}
+    - platform: state
+      entity_id: script.restarthawemo
+      state: 'off'
+  action:
+    service: homeassistant.turn_on
+    entity_id: script.restarthawemo
+  - alias: 'Stop HA'
+  trigger:
+    - platform: state
+      entity_id: switch.KillHass
+      state: 'on'
+  action:
+    service: homeassistant.stop
+  - alias: 'Stop restarting HA is WeMo is found'
+  trigger:
+    platform: template
+    value_template: {% raw %}'{% if states.switch.wemo %}true{% else %}false{% endif %}'{% endraw %}
+  condition:
+    platform: state
+    entity_id: script.restarthawemo
+    state: 'on'
+  action:
+    service: homeassistant.turn_off
+    entity_id: script.restarthawemo
+```
+