The SSD1306 is an OLED display, thus you can’t control the brightness and there is no backlight you can turn off. You can only display a blank page.
You will need to do something like:
- id: page4
lambda: |-
it.print(0, 0, id(my_font), "");
interval:
- interval: 5s
then:
- if:
condition:
binary_sensor.is_on: occupancy
then:
if:
condition:
display.is_displaying_page: page1
then:
display.page.show: page2
else:
if:
condition:
display.is_displaying_page: page2
then:
display.page.show: page3
else:
display.page.show: page1
else:
- display.page.show: page4
- component.update: my_display
Messy I know and not tested…