Change pin mode pi4j v2.0

[RudNick91]

How to change pin mode in v2.0 ?

Im creating output pin like that :

     var pin17out= DigitalOutput.newConfigBuilder(pi4j)
                .id("pin17")
                .address(17)
                .shutdown(DigitalState.HIGH)
                .initial(DigitalState.HIGH)
                .provider("raspberrypi-digital-output");
                
        var pinOut= pi4j.create(pin17out);

And now I wanted to do :

        var pin17in= DigitalInput.newConfigBuilder(pi4j)
                .id("pin17")
                .address(17)
                .provider("raspberrypi-digital-input");

        var pinIn= pi4j.create(pin17in);

Will it work?
I now have 2 pins on the same port .. shouldn't I kill one somehow?

[savageautomate]

@RudNick91

I started a pull request for the MultiPurposeDigitalInputOutput here: #30

Here is the original issue tracking this change: #26

However, I have not had the time to fully test it and get it merged into the project yet. Its something I cam probably start digging back into over the next couple of weeks.

I think this would address the issue you have raised. You would create a single IO object and be able to call the mode() method to change to the desired INPUT or OUTPUT mode as needed.

[RudNick91]

Thank you for the quick reply.

Yes I have the same problem then #26.
I am trying to rewrite the code from v1.4 to handle DHT11.
DHT11 receives and sends data via the same pin.

Can I build and work with version from branch issue/#26 locally without tests?
Or some other workaround for now?

[savageautomate]

Yes, you can try to build from this branch https://github.com/Pi4J/pi4j-v2/tree/issue/%2326 and see what happens.
I'm really not sure if this feature was completed or not. But trying it out is a good way to find out :-)

That branch won't contain some of the newer changes, but should be good enough to test with.

Thanks, Robert

[relaxmax01]

rather old thread, but very interrested by the outcome:

is this functionality (MultiPurposeDigitalInputOutput) available in Pi4J 2.2.1 and is there any doc or example about setting up a GPIO as dual purpose?
I'm trying to find the best way to monitor the state of an input and in some occasion be able to write a Digital.high or low to it.

Thank you!