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+--- Thread: KC868-A8 and PCF8574 Interrupt pin (/showthread.php?tid=1947)
KC868-A8 and PCF8574 Interrupt pin - andhol - 05-31-2022
Hi!
I am planning to use all 8 digital inputs of the KC868-A8, and it would be nice to be able to use the interrupt pin of the PCF8574 to detect changes. I'm just not sure if the pin is connected or not. When looking at the schematic, it looks like it is connected to GPIO16, but there is also a red X symbol next to it that might suggest otherwise.. Any hints?
/A
RE: KC868-A8 and PCF8574 Interrupt pin - admin - 06-01-2022
KC868-A8 have two chips of PCF8574
PCF8574-Digital input: have interrupt pin with ESP32's GPIO16
PCF8574-Digital output: not use the interrupt pin.
RE: KC868-A8 and PCF8574 Interrupt pin - andhol - 06-01-2022
(06-01-2022, 12:13 AM)admin Wrote: KC868-A8 have two chips of PCF8574
PCF8574-Digital input: have interrupt pin with ESP32's GPIO16
PCF8574-Digital output: not use the interrupt pin.
Excellent. Thank you!
/A
RE: KC868-A8 and PCF8574 Interrupt pin - PMGO - 02-20-2024
(06-01-2022, 12:13 AM)admin Wrote: KC868-A8 have two chips of PCF8574
PCF8574-Digital input: have interrupt pin with ESP32's GPIO16
PCF8574-Digital output: not use the interrupt pin.
Hi everyone !
I am planning the exact same thing (use interrupt pin of PCF8574) but my board is KC868-A8S-V1.2 . In my schematic it looks like it is connected to GPIO16 too, but in the "KC868-A8S ESP32 I/O pin define" GPIO16 is connected to RF433MHz wireless receiver.
In my board, the PCF8574 interrupt pin is connected? If not, what can I do?
RE: KC868-A8 and PCF8574 Interrupt pin - admin - 02-21-2024
PCF8574 interrupt pin not used.