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  1. Replies
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    Re: PCF8575 Does not work with my code....

    That looks correct to me (an even number of bytes, one for each port), and matches the datasheet shown in post #4.
  2. Replies
    19
    Views
    5,696

    Re: PCF8575 Does not work with my code....

    Commands to the PCF should be an even number of bytes (one for each port), and you seem to be showing 3.
    What's the extra byte after the address?
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