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Topic: connect pushbutton and led using I2C (Read 3303 times) previous topic - next topic

Nick Gammon


i write data to pcf8574p is 0, then read data from it but getting 255(11111111)
i dont know how i can do the above tutorial work for me



i able to write data on pcf8574p port, but unable to read port data of pcf8574p using wire.h wire library in i2c interface. using arduino uno.

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