hx711 weight sensor

Problems building an HX711 scale with a Wemos D1 mini and Tasmota

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I have been trying for several days now to build a weight scale using several online guides and using for software the Tasmota HX711 integration on a D1 wemos mini V:4. My main guide is this video.

I have tried several different wirings.

Every time I change wiring I check all the wiring several times with a multimeter. I know my resistances between A- and A+ is 2 k ohms, the same as E+ and E-.

Calibration with Tasmota (sensor34 2 #ref_Weight) fails every time.

In this wiring diagram according to many articles, including instructables:

enter image description here

I get the following behavior on sensor reading(‘status 8’) as calibration fails:

Scale empty : HX711″:{“Weight”:0,”WeightRaw”:2722,”AbsRaw”:326727} Add 5 kg to the scale : “HX711”:{“Weight”:0,”WeightRaw”:1766,”AbsRaw”:211991}

Does anyone have any idea what I am doing wrong, or what the right wiring should be? I’ve been banging my head against a brick wall changing wires for 2 weeks now.

At some point, I don’t know how (I lost the wiring) I was getting the right weight (5kg) just reversed (when I was adding it the reading was -4980.) Then I changed A+ and A- and everything collapsed.

Here are some pictures of the actual wiring and project:

enter image description here
enter image description here
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Here are some HX711 shematics from this source:

enter image description here



edited 11 hours ago

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Electronics hobbyist. I torture electrons for fun, not profit.
If you have too much time to kill and don’t know what else to do, stop by and read the reports of my experiments.


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asked 13 hours ago

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