Interfacing with Arduino I2C LCD


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  1. #34
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    Default Re: Interfacing with Arduino I2C LCD

    "LiquidCrystal_I2C lcd(0x3F, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE)"

    interpreted as [( 7bit_addr, EN, RW, RS, D4, D5, D6, D7, Backlight, POLARITY) ]

    the PCF8574 datasheet indicates the 7bit addr range is 0x20--0x27

    0x3f is not valid afaik.


    default with a0:2 open = 7bit_addr of 0x27 , pbp addr would be $4e
    Last edited by richard; - 27th February 2017 at 02:38.
    Warning I'm not a teacher

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