kunal123
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hello,
i refeere following tutorial for i2c communication between push button & arduino uno using pcf8574p i/o expander for i2c bus
**broken link removed**
i receive the data from slave device is 11111111 in binary, i think this is the status of P0 to P7
then i remove all the inputs means push button input connected to pcf8574's (P0 to P7 pin), it again receive the data from slave device is 11111111 in binary, status of P0 to P7.
i think i give address of slave device is wrong.
how i can get correct slave device address
thanks & regards
i refeere following tutorial for i2c communication between push button & arduino uno using pcf8574p i/o expander for i2c bus
**broken link removed**
i receive the data from slave device is 11111111 in binary, i think this is the status of P0 to P7
then i remove all the inputs means push button input connected to pcf8574's (P0 to P7 pin), it again receive the data from slave device is 11111111 in binary, status of P0 to P7.
i think i give address of slave device is wrong.
how i can get correct slave device address
thanks & regards