lovelace-card-mod VS simple-thermostat

Might be a job for card-mod then. (Which is easiest to install via HACS, if you're using that). I don't think there's any risk, just remove the styling if it breaks how it looks.

I used both https://github.com/AnthonMS/my-cards and https://github.com/thomasloven/lovelace-slider-entity-row. (also with card-mod for custom CSS styling) https://github.com/thomasloven/lovelace-card-mod

I installed this: https://github.com/thomasloven/lovelace-card-mod

I used Ha Card Mod which allows you to style cards, and then downloaded the picture off of google images and then edited it to darken it a bit so it wouldn't clash with the white text.. Then I uploaded it to my Home Assistant Blue storage and then styled the card with the picture as the background. Here's my code if you want to see it:

Card mod but instead of using "ha-card" as a selector, you use "ha-card:hover" in the same fashion

Adding CSS styles to a markup card, setting the background to black at half opacity, and removing the borders!

To be able to style them you will also need Card-mod: https://github.com/thomasloven/lovelace-card-mod

I used this library with a D1 mini. I then use this to put in my dashboard There are some examples one is a receiver code that you can get your codes, they also have a lot of ACs codes already. There is also an IRServer example that integrates with MQTT and has some stuff to put in your configuration.yaml so you can get it into HA easily I used this for 6 Samsung ACs, LG Dryer, some basic fans with IR. Samsung is the same each command is like all commands in one on, temp, etc. It has all this built in. I think if you have a IR receiver on your esp board and it will sometimes pick up the commands sent by the regular remote so if someone else uses the dumb remote it will update in HA. It's not perfect but it works pretty well. you can get all in one boards on ali express if you search iresp8255 they have transmitters and receivers.

Here's a cut out screenshot of my nest integration for two separate thermostats using the Simple Thermostat front end customization. (Dining room is on and heating, upstairs thermostat is off to save energy, but it still reports both temp and humidity)

It's using simple-thermostat, works great: https://github.com/nervetattoo/simple-thermostat

It's a Vertical Stack in Card with Simple Thermostats and some Mini Graph Cards to show the data. I really need to clean up that section of the dashboard, but it still looks better than the stock thermostat card in my opinion.