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

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Lesson19- how to use PCF8574 IIC extend GPIO for ESP32 multi relay
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#1
10-09-2021, 04:54 AM

Arduino IDE source code: 

.zip   PCF8574-DO.zip (Size: 771 bytes / Downloads: 669)
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Patrick Offline
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#2
11-11-2021, 05:34 AM (This post was last modified: 11-11-2021, 05:37 AM by 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.


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