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  1. #16
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    Default Re: Read HX711

    @Charlie No, according to the datasheet its serial data clocked out of the adc. I think I've got the bridge wired wrong. Maybe I'll give up on this controller and get one that labelled sensibly, trouble is that'll take forever.
    George.

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  3. #17
    Fanatical Contributor Tim's Avatar
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    Default Re: Read HX711

    Hi George

    Pretty certain it is SPI although it does not seem to have CS

    Tim
    Tim

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  5. #18
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    Default Re: Read HX711

    I guess thats a matter of opinion, I don't believe that clocked serial data without CS is SPI. Certainly no SPI command (in any language) is going to work on this.

    Re. you enquiry, surely there must be "a chip for that".
    George.

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  7. #19
    Member ricardourio's Avatar
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    Default Re: Read HX711

    It uses its own protocol, not a regular pattern.

    Ricardo Urio

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  9. #20
    Fanatical Contributor Tim's Avatar
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    Default Re: Read HX711

    Yes your right

    Here is the data sheet

    https://cdn.sparkfun.com/datasheets/Sensors/ForceFlex/hx711_english.pdf

    I
    purchased a module that has a can over the converter No idea if it will help but will have a play when/if it arrives. https://www.aliexpress.com/item/32890345110.html?spm=a2g0s.9042311.0.0.dafe4c4d7nj iPl

    Load cell looks naff but give me something to play with.

    BTW the coronavirus is causing havoc in China. I have loads of orders delayed that is impacting my sales. Poor people

    Tim
    Tim

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  11. #21
    Prolific Poster joesaliba's Avatar
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    Default Re: Read HX711

    Mine got: -

    GND
    DT
    SCK
    VCC

    I got four sensors with this module. I will try to connect only three, which I found no information how to connect them.

    Back to Tim question: -

    Sensor connection to board I have: - E+ E-, A- A+, B+ B-.

    I have read somewhere that the B+ B- must be left unconnected, otherwise there will be a lot of cross-talking and results are inaccurate, something that you do not want as you need a resolution of 1g.

    Please note that this is what I read on another forum, so that information could be incorrect, but for some reason, all circuit diagrams I have seen do not have the B+ and B- connected.
    Regards

    Joseph

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  13. #22
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    Default Re: Read HX711

    Quote Originally Posted by Tim View Post
    BTW the coronavirus is causing havoc in China. I have loads of orders delayed that is impacting my sales. Poor people

    Tim
    Just heard this minute that 90% of flights to and from China are cancelled. This news came from Malta post to inform customers that there could be long delays
    Regards

    Joseph

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    Default Re: Read HX711

    @Joe what colour wires do you have from the load cells and how are they connected?
    George.

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  17. #24
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    Default Re: Read HX711

    Quote Originally Posted by towlerg View Post
    @Joe what colour wires do you have from the load cells and how are they connected?
    I have three wires from each load cell. They are: - Red, Black and White.

    Attached are some information I found on the web, including how to connect to the board.
    Attached Files Attached Files
    Regards

    Joseph

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  19. #25
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    Default Re: Read HX711

    What I am looking for is to use only three load cell. To be honest I bought them a while ago and never had a chance to try it, although I did some research.
    Regards

    Joseph

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  21. #26
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    Default Re: Read HX711

    @Joe I have similar to your s-l16004.jpg 4 wires, apparently 2 loadcells and different legend on ADC board.
    George.

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