ESP32 Deep Sleep for Rain Guage

ESPHome
1

Is it possible to wake up my ESP32 with the same pin as a sensor?

I have a Rain Guage I’ve build, which uses Pin 27 with a hall effect sensor to detect a bucket tip for rain.

What I’d like to do is put the ESP32 to deep sleep until the bucket tip is detected, then stay wake for a minute, sending any successive tips, resetting that timer. Once it stops raining, the bucket stops tipping and a minute later, deep sleep resumes.

Here’s my current YAML:

substitutions:
  wake_time: '60s'
    
esphome:
  name: esp32-rain-gauge
  friendly_name: ESP32 Rain Gauge

esp32:
  board: esp32dev
  framework:
    type: arduino

# Enable logging
logger:

# Enable Home Assistant API
api:
  encryption:
    key: "xxxxxxxx"

ota:
  password: "xxxxxxxx"

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Esp32-Rain-Gauge"
    password: "xxxxxxxxx"

captive_portal:

# Reed switch between GPIO and GND
sensor:
  - platform: pulse_counter
    pin:
      number: GPIO27
    name: rain_sensor
    unit_of_measurement: mm
    filters:
      - multiply: 0.02

deep_sleep:
  id: deep_sleep_component
  sleep_duration: 30s
  run_duration: 30s
  esp32_ext1_wakeup:
    mode: ALL_LOW 
    pins:
      - 27
    ```