Fish feeding system - Need some pointers / ideas

Hardware
1

Good evening all!

We have a smallish fish tank and at the moment I have a routine that every day announced on our smart speakers it is time to feed the fish. Now the problem with this is if we aren’t in at that moment / away on holiday or don’t hear the speaker.

Now I could solve some of that by checking if we are home etc and perhaps a button to say I have done it and then reminders however doesn’t solve the bit when we are away.

I was wondering if anyone has a clever device that could deliver a tiny pinch of fish food every day at a specified time? I already automate the lights and bubbles so just need this last thing to make it perfect!

Thanks in advance for any insights and suggestions. I am not beyond tinkering with hardware like ESP32’s but I would still say I am fairly novice.

2

I use one of these

then I did this to it

Have a sonoff Basic wired in the LED lighting

and one of these

image
image1338×524 106 KB

one turns the led lights on off and the other we press when we feed them

when we not here I can do from my phone

alias: Toggle the Feed the Fish
initial_state: true
trigger:
  - entity_id: sensor.last_rf
    platform: state
    to: "112691"
condition: []
action:
  - service: tts.google_say
    data:
      entity_id: media_player.livingdisplay
      message: >-
        OK. They were Fed {{ states("sensor.days_last_feed") }} and its
        temperature is {{states("sensor.feeder_ds18b20_temperature")}}..
  - data:
      entity_id: switch.feeder
    service: switch.toggle
  - service: input_datetime.set_datetime
    data_template:
      entity_id: input_datetime.fish_feed
      datetime: "{{ now() }}"
  - delay: "00:00:20"
  - service: cast.show_lovelace_view
    data:
      entity_id: media_player.livingdisplay
      view_path: fish

on my google display I cast the fish screen

image
image1349×740 131 KB

when LED turn off

image
image1337×737 111 KB

here is the card

type: picture-elements
entity: switch.fish_tank_led
image: local/images/Fishtank.jpg
tap_action:
  action: toggle
elements:
  - type: state-label
    prefix: 'Last Feed : '
    entity: sensor.days_last_feed
    style:
      color: white
      left: 50%
      top: 5%
      background-color: rgba(0, 0, 0, .50)
  - type: state-label
    prefix: 'Currenty: '
    entity: sensor.feeder_ds18b20_temperature
    style:
      color: white
      left: 50%
      top: 50%
      background-color: rgba(0, 0, 0, .50)
  - type: state-label
    prefix: 'Max: '
    entity: sensor.feeder_ds18b20_temperature_max
    style:
      color: red
      left: 50%
      top: 25%
      background-color: rgba(0, 0, 0, .50)
  - type: state-label
    prefix: 'min: '
    entity: sensor.feeder_ds18b20_temperature_min
    style:
      color: yellow
      left: 50%
      top: 75%
      background-color: rgba(0, 0, 0, .50)
  - type: state-badge
    entity: sensor.feeder
    name: feeds
    style:
      color: yellow
      left: 80%
      top: 50%
  - type: state-label
    prefix: ''
    entity: sensor.feeder_ds18b20_temperature
    style:
      color: white
      left: 09%
      top: 24%
      background-color: rgba(255, 255, 255, .0)
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