My personal Scale project has a huge drift in its readings for weight

[johnerrington]

@drmina2023

when I measure my weight it gives a correct measurement at first, but the reading starts to decline within minutes to be decreased by about 7KG in 30 minutes, so it starts at 96.6 to reach 89 kg in 30
minutes.

You remain on the scale for 30 minutes?

@drmina2023

I'm using the nano USB to power the whole project

Have you measured the resistance of the load cell(s)? Perhaps the current draw is too much for the supply?
Do you have one of these to check the current drawn from the USB?
https://www.aliexpress.com/item/1005006550950357.html?src=google