Added GPIO output pin that periodically presses the power key of the PSU to prevent poweroff.

esphome/epaperframe.yaml

@@ -35,6 +35,16 @@ api:
 ota:
   password: !secret ota
 
+# Power key of li-ion charger
+output:
+  - platform: gpio
+    pin:
+      number: GPIO15
+      inverted: true
+      mode:
+        output: true
+    id: power_key
+
 # Refresh screen on button click
 binary_sensor:
   - platform: gpio
@@ -176,6 +186,15 @@ time:
   - platform: homeassistant
     id: homeassistant_time
     on_time:
+    # Every 10 seconds
+    - seconds: /10
+      then:
+      - logger.log:
+          level: INFO
+          format: 'Power button press'
+      - output.turn_on: power_key
+      - delay: 0.5s
+      - output.turn_off: power_key
     # Every 5 minutes
     - seconds: 0
       minutes: /10