I recently ordered one of these NEO Coolcam PIR WIFI sensors .

The PIR itself is quite handy and small (sized like a golf ball).
When you take it apart you find a ESP8266EX and a lot of pinholes to connect to. Have a look at forum diskussion here.

The standard software is placed in the tuya/smart life universe and the PIR supports IFTT. Some sellers mention amazon alexa and google home support, but that is not integrated (yet?).

The original behaviour of the PIR is to detect movement, give a signal with the integrated LED's when movement is detected and return to deep sleep if there isn't any movement for 60 seconds.

when connecting the marked pins it is possible to flash the pir and extract the original firmware.
the esphomeyaml I created so far looks like this:

esphomeyaml:
  name: pir2
  platform: ESP8266
  board: esp01_1m
  board_flash_mode: dout

wifi:
  ssid: MyHomeNetwork
  password: VerySafePassword
  domain .veryowndomain

mqtt:
  broker: ip
  username: user
  password: MyMQTTPassword

logger:
  level: VERY_VERBOSE
debug:

ota:
  password: passwd

binary_sensor:
  - platform: gpio
    pin: 
#      number: GPIO1
#      number: GPIO2
#      number: GPIO3
#      number: GPIO4
#      number: GPIO5
#      number: GPIO12
#      number: GPIO13
#      number: GPIO14
#      number: GPIO15
    name: "esp_xxx_pir"
    device_class: motion
 ## https://esphomelib.com/esphomeyaml/components/binary_sensor/status.html
  - platform: status
    name: "esp_xxx_pir_system_status"
    id: "esp_xxx_pir_system_status"

sensor:
  ## https://esphomelib.com/esphomeyaml/components/sensor/uptime.html
  - platform: uptime
    name: "esp_xxx_pir_system_uptime"
    id: esp_xxx_pir_system_uptime

  ## https://esphomelib.com/esphomeyaml/components/sensor/wifi_signal.html
  - platform: wifi_signal
    name: "esp_xxx_pir_system_wifi_signal"
    id: esp_xxx_pir_system_wifi_signal
    update_interval: 15s

With that configuration boot-up is working, mqtt is working wifi-OTA is working.
So far none of the GPIO's was sucessful in keeping it alive or sending a signal. Exactly after 60 seconds the PIR is dead and has to be repowered manually.
So I think I have to figure out how to get the signal after deep sleep wake-up (that has to happen without programming I think).

Would it be wise to set the GPIO's to OUTPUT mode?
Any ideas how to procede?