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+--- Thread: Lesson19- how to use PCF8574 IIC extend GPIO for ESP32 multi relay (/showthread.php?tid=834)
Lesson19- how to use PCF8574 IIC extend GPIO for ESP32 multi relay - admin - 10-09-2021
Arduino IDE source code:
PCF8574-DO.zip (Size: 771 bytes / Downloads: 804)
RE: Lesson19- how to use PCF8574 IIC extend GPIO for ESP32 multi relay - Patrick - 11-11-2021
had to change variables pins_in arduino.h (as suggested in video) for SDA =4 and SCL=5 from original values.
everything works great.
video upload of kc868-a8 relays performing would not work.
couple of pictures to suffice.
RE: Lesson19- how to use PCF8574 IIC extend GPIO for ESP32 multi relay - smortopoul - 12-27-2024
Do I have to made some adjustments for use this for the kc868-a6 board?
RE: Lesson19- how to use PCF8574 IIC extend GPIO for ESP32 multi relay - admin - 12-28-2024
i don't understand what's your question? do you have issue with KC868-A6 ? or KC868-A8?
RE: Lesson19- how to use PCF8574 IIC extend GPIO for ESP32 multi relay - nikost120 - 01-03-2025
(12-28-2024, 01:18 AM)admin Wrote: i don't understand what's your question? do you have issue with KC868-A6 ? or KC868-A8?
Good afternoon, if you notice that the question is being asked about 868-A6 by a completely different person... And the question is, do I need to change anything in the Arduino.h library compared to the 868-A8 board?
RE: Lesson19- how to use PCF8574 IIC extend GPIO for ESP32 multi relay - admin - 01-03-2025
need define i2c bus pin define.