PCF 8574 GPIO pins extension how to use with Blynk iot?

I attached the picture of PCF 8574 extension module please take a look thanks
Anyone using GPIO pin extension to extend GPIO pins ? Using Blynk iot ?
I am working with a project that I wan to use more GPIO Pins using Blynk iot if anyone know how to use with Blynk iot please help Me Thanks

Best Regards

You used the correct part number in your title (PCF8574) but the wrong one here…

If you search the forum for the correct part number then there are a few topics…

I’ve never personally used this particular extender/multiplexor, but I have used some alternatives…


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Thank you from the bottom of my heart sir i will take a look