New screen definition

[sohamakl]

New screen definition

[Trenar]

Hi @sohamakl, nice to see you working on this.
At first I want to mention #2 to let people see our recent discussion :)

It may be confusing for people that you call pin 29 in the shell script but use 21 in circuit diagram (at least it was for me). So let me attach this link to clarify the pinout used by wiringpi / the gpio utility.

How do you feel about having the gpio mode XX out line not in the screen_switch.sh script but as the cmdInit of the screen config? However I feel like both solutions are not ideal, best would be an additional config parameter and a fallback pin number.

Shouldn't the wiringpi core be update when running sudo apt update && sudo apt upgrade? I think this is done anyhow at some point of the installer script.

Last comment: The image of the optocoupler wiring is very blurry.

I could prepare a pull request once I find time for it.

[sohamakl]

Sorry, I'm not getting along with github very well yet, so I don't want to make any pull requests or merges.

It would be great if you look at my suggestion and hopefully include it in the project.

I took up Trenar's good idea and implemented the power on/off function for the Sunfounder HDMI display via optocoupler.

In this context the following 'files' were created:

• New screen definition file
• Shell Skript from Trenar adapted to my individual configuration
• Circuit diagram
• Board layout
• Datasheet optocoupler
• Two Photos

I also noticed that the wiringpi extension used in the script needs to be updated on the Raspberry Pi 4 first.

This may need to be included in the installer script and works as follows:

cd /tmp
wget https://project-downloads.drogon.net/wiringpi-latest.deb
sudo dpkg -i wiringpi-latest.deb

Screen definition Sunfounder 10.1 hdmi display.zip

Hi @Trenar,

moving the gpio definition to the config file is a very good idea.

I will take some new and better photos when I back home on Sunday.

I had to update wiringpi manually. I also read on the developer's website that he does not want to support future versions of Raspberry Pi.

[Trenar]

Hi,
I played around a little.. Moving the Pin param to the config is imho not feasible, since the config parameters are not accessible where the screen config file is loaded. Therefore, I added a variable in the screen config file which has to be set manually. For now I set it to your default pin 29.

See PR #94 and please test it, just to be on the save side :)

[sohamakl]

I took three more photos with bit better quality than before.

Sunfounder

Opto coupler

Raspberry Pi

[Trenar]

Looks good. However I think we don't need to upload these images to the git, but instead refer to this conversation at some point, maybe in the screens/README.md of #97

[sohamakl]

Good idea, could you be so kind and add it to screens/README.md? I really need to learn how to use Github, sorry.

[Trenar]

@gegu will do so :)

[gegu]

I think this would be a classic case for a page in the wiki. where we can link to.
Just someone would have to dare to create the first page 😏

[sohamakl]

My English is not perfect and I don't know how to use a wiki on github yet.

But it seems to be a good start to write a little how-to on the topic "Hardware extension for time-controlled on/off switching of the Sunfounder 10.1 inch HDMI touch display".

If you agree, I would take it over.

Who can give me the necessary rights?

[LukeSkywalker92]

you should be able to edit the wiki now.

[gegu]

@sohamakl great wiki page 👍

Closed by #97.

[sohamakl]