Adding values by hand to a sensor

Configuration Frontend
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Hi everyone,

for my new fish tank, I installed a Shelly with the temperature addon. This lets me control the heater and monitor temperature trends directly in Home Assistant – works great so far!

Now I’m wondering if I could do something similar for my monthly manual chemical water tests (like pH, nitrate, etc.). I’d like to enter these values manually once a month and then visualize their trends over time on my Home Assistant dashboard.

Does anyone have recommendations on which integration or approach to use for this?

Thanks in advance!
Cheers,
Timo

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type: history-graph
entities:
  - entity: input_number.tankph

Create an input number helper then use card above. You could create a custom card and use a slider to pick the number.

type: custom:slider-entity-row
entity: input_number.tankph
full_row: true

mangraph
mangraph509×402 181 KB

You would set the possible values for your input number based presumably 6 to 8 so you can easily slide the bar as the numbers will be small. You can use decimal points. Steps of 0.1. You can use an input box rather than the slider if you prefer.
For long term statistics you will have to use a template sensor to turn the ph into a sensor with a device class. Input numbers are invalid for statistics card.

2 Likes
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Bildschirmfoto 2025-06-07 um 18.24.15
Bildschirmfoto 2025-06-07 um 18.24.151054×1278 48.2 KB

Thanks!
I used Apex Card to see all values in one diagram - I am not sure if I can manage this with the history-graph

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Yeah, History graph is a basic one. That’s the thing with HA. There are nearly always alternatives.

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but thanks for the hint with the helpers :slight_smile: that should be working for me :slight_smile: