Process them independently ? You basically Wiring up each load cell to a separate HX711 ? That way are we not limiting the capacity ? Each cell is rated up 100KG, so total weight will always between 0-100KG ? where as in Parallel we could get upto 4 x 100KG = 400KGI've never understood the proclivity to wire load cells in parallel, especially in regard to the complexity and time/labor involved to trim each load cell such that the combination produces an acceptable result.
My preference is to sample each load cell independently -- either using separate hi-quality ΣΔ ADCs, or one ΣΔ with multiplexed bipolar inputs -- and process the calibration of each load cell independently. The algorithm to do this is utter simplicity, simply requiring a few different weight inputs (or weight locations) and solving a trivial matrix.
This is much faster and cheaper, and each cell adjustment does not affect the other cells.
Sorry, I missed the "HX711" part of your post. I don't know this module, and I was speaking in general terms (in the spirit of which I assumed your post was speaking).You basically Wiring up each load cell to a separate HX711 ?
Look thru the link in post#12.
It appears that you have a 'full bridge' ie: 4 wires on each cell.
Post a link to where you bought them, so that we can check.
If you want to parallel the 4 modules, connect all the wires of the same colour together as per your post #15 diagram.
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by Jake Hertz