Help with implementing a temperature gauge with multiple RESTful data items

Hi

I have some temperature data points being collected in my home from various devices that provide Json data - I’m currently using a RESTful sensor config to get these; I may choose to get them from MQTT at some stage but for the time being they provide what I need.

I have previously been using a custom web app to display some of this information and I would like to recreate the visual element of my dashboard widgets in Home Assistant.

Here’s what I currently see on my dashboard:

This is a simple HTML table/div set, each item displayed is from the Json payload for each thermometer and this is showing five sensors in the one widget

The current dashboard I have in HA is like this:

It’s… pretty dull and uninspiring!

This is all new to me; I’m adept at HTML, javascript etc. but have no idea how to go about creating a custom card/entity (not sure what it actually is at this stage). If anyone has some good pointers, or indeed can direct me to an existing solution, that would be awesome

Thanks in advance

Not sure but the only thing I can think of is Apexchart.

But that is generally for showing temperature over time, you just want a now with color.
Perhaps that is possible to with Apexchart

in HACs is at least one gauge card with different colors per range. Look there for gauge, bar chart or similar cards