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Serial 4D Library reports error NAK returned data= 21

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  • Serial 4D Library reports error NAK returned data= 21

    After a while I'm running my sketch I get this error: "Serial 4D Library reports error NAK returned data= 212".
    I powered the devices by an external powered USB (2000mA), I can't post my sketch because is too long but I used the same code on the example projects.
    The serial speed of the display is 9600 baud.
    Any idea?
    Exist any way to catch the error and reset the display?

  • #2
    hi naamah75,
    without the code it's hard to tell.
    if your code relates to external hardware it's also hard to tell if we don't have the devices to test with
    you don't need to post the code on the forum thread, you may also post the file instead if it doesnt rely on too many external peripherals and we can check it out

    Tony

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