borntokillyou:
YES! I know i changed it to 0x38
Im very new to this, and I dont really know how to address the i2c.
Im using a pcf8574AP
can anyone advise me on how to use jumper to change the address?
I've been looking all over the net for solutions.
Well we finally have some of the information we need. We still don't know which library you used which may influence how to deal with the I2C address.
To determine the I2C address:
(1) Look at figure 10 of the datasheet to start to determine the address. You will notice that three of the bits are designated as A0, A1, and A2.
(2) Look at figure 2 to find out which IC pins are used for these three bits.
(3) Look at the bottom of your PC board to determine the logic level of these three bits.
(4) Put those logic levels back into figure 10 to get your actual address.
Don