Using Simulink with load cell and amplifier HX711

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Qais El-Bakaein
Qais El-Bakaein 2018-6-17
评论： aakash dewangan 2021-8-29
I have checked the similar questions and could not find an answer. I am using a load cell and an amplifier HX711 with arduino uno and simulink. I trying to make a S-Function with the help of the library provided https://github.com/bogde/HX711
But so far unsuccessful!! Is there an easier way to do it? if not can someone help me build the S-function? I am quite new to programming and quite bad with C.
I would appreciate any help with this :) thanks
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Jiang Ping
Jiang Ping 2019-1-14
I am not quite sure how to ‘have a sketch (C code) on the arduino that calls upon those libraries.....'. I know that certain functions with existing lib can be built, but I am not sure how. Appreciate it if you could enlighten a bit.
My final goal is to buit the whole model in simulink and read real time data on it.

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Walter Roberson
Walter Roberson 2018-6-17
As described in https://www.mathworks.com/matlabcentral/answers/375638-i-want-to-read-loadcell-data-using-matlab-simulink-using-hx711-how-can-i-help-you-await-your-help#answer_298886 you can use readDigitalPin from the MATLAB side in order to get the readings.
However, in order to calibrate the device, you need the libraries I linked to, or the libraries that you linked to. Those libraries run on the Arduino.
If you decide to use readDigitalPin from the MATLAB side, you will probably not be able to sample faster than 4 to 10 Hz, with 1000 Hz as the maximum ever possible with that method because of the way that USB is designed.
If you need more than 4 or so Hz sampling, then you need to have code on the Arduino side that reads multiple samples and sends the group of samples to MATLAB.

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