TIL How to build a sensor for when I am at the computer

til/how-to-build-a-sensor-for-when-i-am-at-the-computer.md

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+---
+title: "How to build a sensor for when I am at the computer"
+date: "2024-07-19T22:52:44+02:00"
+tags: ["hass"]
+---
+
+I started using this little utility called [HACompanion](https://github.com/tobias-kuendig/hacompanion) that can be configured with a [custom script](https://github.com/tobias-kuendig/hacompanion/discussions/28#discussion-5440242) that reads whether your monitor screen is locked or is not. 
+
+I normally always force lock my screen when I leave my computer, so it is a good indicator for "when I am at the computer".
+
+At the moment I am using this sensor to turn on a small lamp behind my monitor. I do that with an HA automation:
+
+```
+alias: Orange lamp on when computer unlocked
+description: ""
+trigger:
+  - type: turned_off
+    platform: device
+    device_id: <computer_id>
+    entity_id: <sensor_custom_script_id>
+    domain: binary_sensor
+condition:
+  - condition: time
+    after: "22:00:00"
+    before: "02:00:00"
+action:
+  - type: turn_on
+    device_id: <shelly_plug_id>
+    entity_id: <turn_on_action_id>
+    domain: switch
+mode: single
+```
+
+I have another similar automation to turn it off. I have not managed yet to find an easy way to map both state transitions (on and off) with only one automation.