Quote Originally Posted by Darrel Taylor View Post
Then it must be 1).

Put this line at the top of your program.

ADCON1 = $F ; set all pins to digital
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Copy-Pasted that ADCON1... and that could have helped but unfortunately it did not help, nothing changed
The problem is somewhere else, but where?

Does that 65KHz sound correct? On what frequency should the clock run under those two I2C routines (I2CREAD I2CWRITE), where could one find any info on that. Tried also DEFINE I2C_SLOW, but again without success... What can I do? The expander is kind of alive because it does not throw you to the error label....