SOLVED I2C only works without wire.begin?

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so 1 new (to me):

i have pca9555db port extender, , works want it, if add wire.begin() in setup (logical).

i have pcf85134hl lcd display controller, , work if remove wire.begin() code!
it runs wire functions (weird stuff!).

unfortunately, have both in project need fix somehow, it's above skills atm.
i post code, not sure if fault in there, both ic's work, not together.

i tried disabling internal pull-ups, didn't work.
anyone have idea look?

external libraries?


Arduino Forum > Using Arduino > Networking, Protocols, and Devices (Moderator: fabioc84) > SOLVED I2C only works without wire.begin?


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