Esp8266 deep sleep command over WIFI?

ESPHome
1

I plan to use an ESP8266 D1 as presence detection for my car.
And no need to have it running after about 120sec after car parked. Wondering if possible to issue deep sleep command over WIFI then wake up using RTC and use ESPHome to program this functionality? Of course plan B is PlatformIO and MQTT integration.
The idea is to wake it every 15min using RTC and as soon it reports to HA issue deep sleep command over WIFI if car is home.

2

On the esp8266 you can enter deepsleep anytime you want. I do it with mqtt

mqtt:
  
  on_message:

    - topic: gardensensor/sleepearly
      payload: 'ON'
      then:        
        - deep_sleep.enter: deep_sleep_1
3

Ok, thanks! I’m trying this…
On a different subject: will captive portal timeout and esp boot to programed fw? That is when car away from home, no router to connect to.


sensor: 
  - platform: wifi_signal
    name: "SUB WiFi Signal"
    id: sub_home
    update_interval: 120s
    filters:
      - sliding_window_moving_average:
          window_size: 10
          send_every: 10
          send_first_at: 10 
    icon: mdi:wifi
     
binary_sensor:
  - platform: template
    name: "SUB Home"
    lambda: |-
         float analog = id(sub_home).state;
         return analog < -60; 
    on_press:
      then:
        - deep_sleep.enter: 
            id: deep_sleep_1
            sleep_duration: 60min

deep_sleep:
  id: deep_sleep_1

 # Turns LED on GPIO04 On when Wake
switch:
  - platform: gpio
    pin: GPIO4
    name: "SUB connected LED"
    id: led