Two PCF8574 libraries

Projects Programming
1

There is a Demo written by Rob Tillaart (file pcf8574_test.ino, date 27-08-2013) which I would like to use.

However, I cannot get this to work as the library available on GitHub, with the same name as Tillaarts, is by SkyWodd. From reading the .h versions of both libraries, it is clear that SkyWood's version has more capability. Can some one inform me if there any more examples that I can use to educate myself using SkyWodd's library? I'm particularly interested in reading from a keypad. Andrew

2

Please post a link (using the chain links icon on the toolbar to make it clickable) to where you found this "SkyWodd" library.

3

I'm sorry, but being new to the Arduino Forum I can't find how to get a link. Perhaps my explanation helps

What I have done to find these PCF8574 libraries, is to search with Google, go then to GitHub, select the library, fork and download the zip file. Then I have the following in my Documents folder /Arduino/Library/PCF8574. This has in it
@brief PCF8574 arduino library

There is a further PCF8574 library by json. This , from my download folder belongs to Arduino-master.

4

awsjohnson:
go then to GitHub

When you do that, there will be a URL in the address bar of your browser. You just need to select that text, copy it, and then paste it here.

5

[

I also found a further PCF8574 Library by xreef at [

So there seem to be more than two PCF8574 libraries.

I hope this helps.](GitHub - xreef/PCF8574_library: PCF8574 library. i2c digital expander for Arduino, Raspberry Pi Pico and rp2040 boards, esp32, SMT32 and ESP8266. Can read write digital values with only 2 wire. Very simple to use and encoder support.)](GitHub - skywodd/skywodd_website_dev: Skywodd website - development repository)

6

This is SkyWodd's website which has not been active for 6 years.

7

awsjohnson:
I'm sorry, but being new to the Arduino Forum I can't find how to get a link.

You can't do it from the quick reply. Below the text entry box, click on "Preview", and you will get the full editor with the link button.

8

awsjohnson:
GitHub - skywodd/skywodd_website_dev: Skywodd website - development repository

This is SkyWodd's website which has not been active for 6 years.

That repository doesn't contain any Arduino libraries so I'm not sure why you're posting it here.

Please provide the link to the PCF8574, as I have requested earlier.