KC868-A8 and PCF8574 Interrupt pin

[GVDC]

Hello,
With Interrupt pin you can verify at each moment during the loop the pressure of a fluid (with analog meter).
If that pressure is higher than a maximum tolerated value, the sketch must be stopped immediately because damage will occur.
I use now IDE version 1.18.19.

Is it possible witch V1.5?

The control must be done continiously from the begin of the loop until the end.
I don't know the code for it and I do not find codes nearby.


Thanks