Limitations to using Cell Phone Touchscreen

[hayloiuy]

Hi, I am new to this Pi thing. I have been searching around about using cell phone's touch screen capability as an input for the Pi. But what I got from around the web was just a simple 'no' for an answer without any reason as to why it is so.

So my question is:
What are the hardware and software limitations of using a cellphone's touch screen as an input for the Pi?
Is it achievable with some major or minor tweaking?

[sdjf]

It may not be standard, and not easy to set up, but I think it would be possible, as long as your cellphone had a way to connect to the Pi. You might have to use VNC and a virtual keyboard over VNC. I have had to do that when attaching a PDA to the Pi over VNC, install a virtual keyboard and tap on those keys.

But the real question, as I see it, is how you would go about connecting the cellphone to your Pi. Does it have a browser? Does it have a VNC application? Very naive questions, but I really think it depends more on the hardware and software available for your cellphone than your Pi, so please post what you know about it's connectivity capabilities and make/model number.

Now, a rather wild project would be to have your Pi either answer the phone or be a webserver, those would be other ways, but I still think you would probably have to use VNC unless you could ssh in somehow. Any GUI (i.e., graphical) applications would likely need a virtual keyboard on the Pi end. What kinds of things are you wanting to do from your cellphone on the Pi? Command line input with ssh probably would not need a virtual keyboard, but I don't know if or how you would do that.

[klricks]

I can connect to my RPi with SSH over WIFI (not cellular) within my local network using an SSH app on the phone.
There are RDP apps as well..... I have not tried.

Don't think there is any other way to use a smartphone screen with the RPi.

[DougieLawson]

On my android tablet I've got JuiceSSH and a VNC client. Both work well with the RPi.

https://play.google.com/store/apps/deta ... i.juicessh
https://play.google.com/store/apps/deta ... androidVNC

[hayloiuy]

Well, I have a Samsung Galaxy S3 which I am ready to rip apart. I just need the touch screen to work as an GUI for the Raspbian OS.

[RaTTuS]

Well, I have a Samsung Galaxy S3 which I am ready to rip apart. I just need the touch screen to work as an GUI for the Raspbian OS.

use one of the touch screens that work with the RPi rather than trying to hack that one...

like http://www.raspberrypi.org/phpBB3/viewt ... 45&t=48967

what's wrong with the S3 ?
it's a fine phone

[hayloiuy]

Well, I have a Samsung Galaxy S3 which I am ready to rip apart. I just need the touch screen to work as an GUI for the Raspbian OS.

use one of the touch screens that work with the RPi rather than trying to hack that one...

like http://www.raspberrypi.org/phpBB3/viewt ... 45&t=48967

what's wrong with the S3 ?
it's a fine phone

I am just trying to utilize the resources that I have. I have an old S3 but no money for new touch screen. Let's just say that I am ready to use the cell phone's touch screen but no money to get the RPi touch screen.

[sdjf]

If you have to go with existing hardware, then you may just have to use VNC to access your Pi from the phone. That was the only type of GUI access I had for a very long time to my Pi, and it did work. Why risk ripping the old cellphone apart and possibly not succeeding when VNC should work now with the software available?

[klricks]

Well, I have a Samsung Galaxy S3 which I am ready to rip apart. I just need the touch screen to work as an GUI for the Raspbian OS.

use one of the touch screens that work with the RPi rather than trying to hack that one...

like http://www.raspberrypi.org/phpBB3/viewt ... 45&t=48967

what's wrong with the S3 ?
it's a fine phone

I am just trying to utilize the resources that I have. I have an old S3 but no money for new touch screen. Let's just say that I am ready to use the cell phone's touch screen but no money to get the RPi touch screen.

There is no feasible way to get a random LCD screen working on a RPi.
You need to find or create an interface for the specific screen you have which needs to convert to HDMI and/or Composite.

Take a look at the interface board in this listing to get an idea of what would be required. The interface board is bigger than the RPi.

http://www.ebay.com/itm/Diy-Monitor-for ... 1c334f8a0f