Lesson19- how to use PCF8574 IIC extend GPIO for ESP32 multi relay

[admin]

Arduino IDE source code: 

  PCF8574-DO.zip (Size: 771 bytes / Downloads: 794)

[Patrick]

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.

[smortopoul]

Do I have to made some adjustments for use this for the kc868-a6 board?

[admin]

i don't understand what's your question? do you have issue with KC868-A6 ? or KC868-A8?

[nikost120]

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?

[admin]

need define i2c bus pin define.