KC868-A8 and PCF8574 Interrupt pin

[admin]

i don't understand what you want to do details.

[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

[admin]

if you will use analog meter, it will connect with KC868-A8 board's analog input port, not use by PCF8574, that use for digital INPUT or OUTPUT.

[boe666]

A16 - for use the interrupts for PCF8574 (U32 U31) can I remove R147 and R148 and connects INT pins (PCF) to the unused GPIO8 and GPIO9 ESP32 ?
ESP32 can hold interrupts on this port - somebody tested similar idea ?
BTW, I don't understand why Kicony doesn't use that INT pins....

[admin]

because not enough gpio for you. PCF8574 already can work well without INT pin. if you MUST want use INT pin, you can connect with any ESP32 free GPIOs.