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Lesson19- how to use PCF8574 IIC extend GPIO for ESP32 multi relay
#1

Arduino IDE source code: 

.zip   PCF8574-DO.zip (Size: 771 bytes / Downloads: 767)
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#2
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.


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