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Hello,
I am using the KC868-A6 board and reading digital inputs through the PCF8574.
I need to know whether the INT (nINT) pin of the PCF8574 is connected to any GPIO pin of the onboard ESP32.
I have checked the hardware documentation, but I could not find a clear answer.
Some older forum posts suggest that the INT pin might not be connected at all, but I want to confirm this specifically for the KC868-A6.
Could you please clarify:
- Is the PCF8574 INT pin connected to the ESP32 on the KC868-A6 board?
- If yes, which ESP32 GPIO pin is it wired to?
- If not, is there a pad or test point where the INT pin can be accessed so we can wire it manually?
- If possible, could you share the related portion of the schematic or PCB layout showing the PCF8574 connections?
I want to use hardware interrupts instead of polling the inputs constantly, so knowing the actual connection would help a lot.
Thank you very much!
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