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dangrie158 / opencushion

A c++ driver and a node binding for the HX711 Load Cell Amp
MIT License
14 stars 17 forks source link

Erratic readings from hx711 #8

Open JoeToeniskoetter opened 5 years ago

JoeToeniskoetter commented 5 years ago

I am using the proved example and I am getting readings on the screen however, my readings are very erratic. Here is what I get in the console when running the example code: 0.0575999990105629 0.003599999938160181 -2.8401999473571777 0.00800000037997961 0.04340000078082085 0.05620000138878822 -1.393399953842163 0.016599999740719795 2.8845999240875244 2.8296000957489014 -1.4026000499725342

Any help would be appreciated. Thanks!

alina commented 5 years ago

Having the same issue:

16.774999618530273 -8.684399604797363 -5.259200096130371 16.5802001953125 -8.912799835205078 -7.584199905395508 -2.6602001190185547 -15.50100040435791 -61.790199279785156 1.4910000562667847

I verified that it's not a sensor problem with a python hx711 library which worked fine. Any suggestions would be much appreciated. Thank you!

Swompet commented 4 years ago

Did you solve the Problem? I have got the same.

JoeToeniskoetter commented 4 years ago

Did you solve the Problem? I have got the same.

@Swompet

Yes I did end up fixing my issues Which were caused by incorrect wiring. Double and triple check your wiring. It can be very easy to mess up and connect the wires incorrectly.

Swompet commented 4 years ago

@JoeToeniskoetter The thing is this works fine with a python script. What wiring did you mess up?

JoeToeniskoetter commented 4 years ago

@Swompet The wires connecting my 4 load cells into a Wheatstone bridge were wrong. So when using your python script you are getting correct readings from the hx711?

Swompet commented 4 years ago

@JoeToeniskoetter Yes in python it works fine. did you do anything with the bit order?

Swompet commented 4 years ago

I was able to fix this. I was a pin issue. But now I am not able to calibrate the cell or tare it. this is my output: at some point i pressed tare. Units : 28202.230469 | Offset: 0 Units : 31721.539062 | Offset: 0 Units : 28193.691406 | Offset: 0 Units : 35236.230469 | Offset: 0 Units : 35232.460938 | Offset: 0 Units : 35231.308594 | Offset: 0 Units : 35230.769531 | Offset: 0 Units : 35228.691406 | Offset: 0 Units : 35228.847656 | Offset: 0 Units : 35230.769531 | Offset: 0 //////////at this point i pressed the tare button Units : 1.615385 | Offset: -458029 Units : 4.153846 | Offset: -458029 Units : 6.461538 | Offset: -458029 Units : 10.769231 | Offset: -458029 Units : -3507.538574 | Offset: -458029 Units : 28.384615 | Offset: -458029 Units : 26.769230 | Offset: -458029 Units : 30.769230 | Offset: -458029 Units : 37.769230 | Offset: -458029 Units : 41.384617 | Offset: -458029 Units : 46.538460 | Offset: -458029 Units : 49.076923 | Offset: -458029 Units : 54.923077 | Offset: -458029 Units : 56.846153 | Offset: -458029 Units : 64.230766 | Offset: -458029 Units : -3461.846191 | Offset: -458029 Units : 70.769234 | Offset: -458029 Units : 70.076920 | Offset: -458029 Units : 76.769234 | Offset: -458029 Units : 78.230766 | Offset: -458029 Units : 82.384613 | Offset: -458029 Units : 82.153847 | Offset: -458029 Units : 84.384613 | Offset: -458029 Units : 82.692307 | Offset: -458029 Units : 81.000000 | Offset: -458029 Units : 82.076920 | Offset: -458029 Units : -3445.923096 | Offset: -458029 Units : 85.923080 | Offset: -458029 Units : 87.307693 | Offset: -458029 Units : -3444.692383 | Offset: -458029 Units : -3440.769287 | Offset: -458029 Units : 90.307693 | Offset: -458029 Units : 17745.691406 | Offset: -367384 Units : 7061.538574 | Offset: -367384 Units : 7034.077148 | Offset: -367384 Units : 23.769230 | Offset: -366992