[quote:223e1b67e5="Mrshilov"]I check this in non-arduino LCDs and non-Arduino PCF8574 plate.[/quote:223e1b67e5]
And how would I know that? :evil:
Connections are then like described in your code?
Here you're configuring soft I2C-clock speed:
[code:1:223e1b67e5]Config I2cdelay = 1[/code:1:223e1b67e5]
From the help:
[quote:223e1b67e5]When you use a very low crystal frequency, it is not possible to work with high clock frequencies.[/quote:223e1b67e5]
A value of 1 means that's what you try to do.
Why you connect the expander to the hardware I2C-pins, while using soft-I2C?
External pullups are connected?
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