Ilonda Wifi Smart Fish Feeder (L88)
Ilonda Wifi Smart Fish Feeder (L88) is a Tuya-based device sold by Amazon (not only under Ilonda, but also under other brand names).

Originally intended to be used with its companion app, once flashed using tuya-convert, ESPHome generated firmware can be uploaded allowing you to control the Wifi Smart Fish Feeder via Home Assistant.
Configuration
Thanks to the amazing Tasmota template, managed to build a fully working esphome configuration. This assumes you have a secret.yaml with ssid and password keys.
esphome:
  name: wifi_smart_fish_feeder
esp8266:
  board: esp01_1m
wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password
logger:
api:
ota:
# Binary Sensor to allow relay to be switched when physical button is pressed
binary_sensor:
  - platform: gpio
    id: button
    pin:
      number: GPIO4
      mode:
        input: true
        pullup: true
      inverted: True
    name: 'Switch feeder'
    on_press:
      - switch.turn_on: relay
  - platform: status
    name: "Status"
switch:
# Switch to turn feeder on for 3 seconds/off and turn on/off LED
  - platform: gpio
    name: 'Relay feeder'
    id: relay
    pin: GPIO14
    on_turn_on:
      - light.turn_on: led
      - delay: 3s
      - switch.turn_off: relay
      - light.turn_off: led
    restore_mode: ALWAYS_OFF
sensor:
# Feeder counter
  - platform: pulse_meter
    pin: GPIO12
    name: 'Counter/min'
    unit_of_measurement: 'time(s)'
    internal: true
    total:
      unit_of_measurement: 'time(s)'
      name: 'Counter feeder'
# To allow led to be controlled via GPIO
output:
  - platform: esp8266_pwm
    id: blue_led
    pin:
      number: GPIO5
      inverted: true
# LED control
light:
  - platform: monochromatic
    output: blue_led
    id: led
You can now add your Wifi Smart Fish Feeder to Home Assistant via the configurations page, look for 'ESPHome' under the Integrations option and click 'Configure'.