Add uptime sensor

Author: f18m

main.yaml

@@ -74,6 +74,29 @@ text_sensor:
       icon: mdi:network-outline
   - platform: version
     name: "ESPHome Version"
+  # Uptime Sensor
+  - platform: uptime
+    name: "Uptime"
+    id: uptime_sensor
+    update_interval: 360s
+    on_raw_value:
+      then:
+        - text_sensor.template.publish:
+            id: uptime_human
+            state: !lambda |-
+              int seconds = round(id(uptime_sensor).raw_state);
+              int days = seconds / (24 * 3600);
+              seconds = seconds % (24 * 3600);
+              int hours = seconds / 3600;
+              seconds = seconds % 3600;
+              int minutes = seconds /  60;
+              seconds = seconds % 60;
+              return (
+                (days ? to_string(days) + "d " : "") +
+                (hours ? to_string(hours) + "h " : "") +
+                (minutes ? to_string(minutes) + "m " : "") +
+                (to_string(seconds) + "s")
+              ).c_str();
 
 # Captive Portal is the portal created by this node when Wifi connection fails
 captive_portal: