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Questions tagged [touchscreen]

Use this tag for questions about touchscreen compatibility, and how to use compatible touchscreens with the Raspberry Pi.

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ffplay and 7'' touchscreen

I'm trying to use ffplay with my RPi3B+ running the latest Rasbian Lite but it returns the following error: Could not initialize SDL - No available video device (Did you set the DISPLAY ...
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39 views

3.5 inch touchscreen driver without internet and Ethernet cable

I recently bought a Raspberry Pi B 3+, I installed Raspbian OS on a SD card and I also bought a 3.5 inch touchscreen. However, the touchscreen display stays white. Here is the screen (sorry for the ...
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20 views

Weird output on 10.1" HDMI/USB touchscreen (Waveshare)

I have an HDMI+USB 10.1" screen connected to Pi. When used only HDMI is work fine but when pluged usb (touch) the display weird output.
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19 views

Use VNC to get right-click on touchscreen

I found that when I use a Windows VNC client to connect to my Pi, it has a very nice emulation of right click, middle click, etc. The functionality I cannot get from my normal touchscreen setup: Pi ...
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0answers
17 views

Invalid MIT-MAGIC-COOKIE-1 keyQXcbConnection: Could not connect to display localhost:10.0

I have RPi 3 B+ and 5" HDMI touch screen. I wrote this little GUI application in Python: import sys import os from PyQt5 import QtWidgets class Test(QtWidgets.QDialog): def __init__(self): ...
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0answers
45 views

How to configure duplicate screen on a Pi?

I have a Raspberry Pi 2 connected with a TouchScreen. I also connect another external display via HDMI. Goal I've been trying to make my external display show as duplicate mirror the one on the ...
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9 views

How can I make my touch lcd screen to work like a laptops touch pad

How can I make my touch lcd screen to work like a laptops touch pad? Is it possible because I am not able to access the corners of the lcd and I can't use the Pi correctly. Is it possible to make it ...
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29 views

Touchscreen (ACER UT241Ybmiuzx): multitouch is working in Chromium but not on desktop or filemanager

I'm stuck with installation of the above monitor and do not find a way forward. Touchscreen is running, operating perfectly with gestures in chromium, i.e. left click is fine. But on desktop or any ...
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1answer
65 views

Raspberry Pi Touch Screen - I can't do anything

So, I recently bought a UCTRONICS LCD 3.5 in. touch screen for the Raspberry Pi (I have a Raspberry Pi 3 with Raspbian Stretch), and attaching it and getting it to turn on worked just fine. I ...
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45 views

How do I find which pins my TFT display is using?

I have a TFT Touch Screen Display from Tontec that I'm using for a project. According to the product description the display only uses 8 pins. However, the connector cable takes up 26 pins worth of ...
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1answer
27 views

Waveshare 7'' LCD conflicts with WIFI (hostapd)

I have bought a Waveshare 7'' LCD (C) (https://www.waveshare.com/7inch-HDMI-LCD-C.htm) and it seems to work correctly on Raspberry PI 3B+ following the instructions on the site (it doesn't require ...
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36 views

Use Raspberry Pi as bluetooth keyboard

I'm wanting to do a project with a Raspberry Pi acting as a Bluetooth keyboard and/or mouse. The Pi would be connected to a touchscreen display, and I would have a virtual keyboard on the screen that ...
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2answers
47 views

How to make a stand by button?

I am using an Raspberry Pi 3b and a 7 inch hdmi waveshare touchscreen that connects to rpi with a hdmi cable and a micro usb cable. I want to program a push button from GPIO pins to make the screen ...
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1answer
118 views

Pi 2 won't boot without touchscreen connected

Timeline of events: Installed a stable version of Raspbian, all systems work no real testing with the GPIO but HDMI and SSH work. Tested various GPIO pins for running fans and several pieces of ...
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22 views

Simple network manager application for 5inch display

I want to install on my Raspbian Lite (I already installed basic xinit packages and I'm able to run a graphical jar app without problem) a simple network configuration with GUI. My goal is to connect ...
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1answer
72 views

Change back from LCD driver

I've successfully installed this 3.5" LCD display, which uses this LCD driver: https://github.com/goodtft/LCD-show. My problem is, that when I use VNC to remotely access the PI, (I assume) because of ...
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2answers
173 views

Pi Official Touchscreen Dim on Timeout (Screensaver like)

I've done a lot of Googling but not found anything. What I would like to do is dim the backlighting after a timeout period of no GUI activity and restore the backlight brightness on GUI activity. ...
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1answer
43 views

where to buy the raspberry pi 7" touchscreen display board separately? [closed]

My raspberry pi 7" touchscreen display board black plastic connector (BROWN CONNECTION ABOVE RPI DISPLAY LETTERING) that holds the ribbon to the raspberry pi broke and I am looking for a replacement ...
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52 views

Composite not Working on Raspberry Pi 3 B+

Raspberry Pi 3B+ with Noobs installation Then Emulation Station There is an official Rasberry pi touch screen attached by the ribon cable and 4 jumper wires to the Gpio. I used different power and ...
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0answers
23 views

Is there anyway to use raspberry pi to control an air compressor driving a hydraulic press?

I have a 20 ton shop press that I would like to automate to have certain run settings at a certain psi for a specific amount of time. For instance if I wanted to press something at 140 psi for 3 ...
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1answer
45 views

Can the GPIO pins be used to compromise a raspberry pi?

For example, would a touchscreen device that uses the below pins on a Raspberry Pi 3 be able to do something more than say, send touch and keyboard events? Anything hackish/nefarious? (edit: use case: ...
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112 views

Touch screen functionality not working on raspberry pi zero w and 5 inch lcd screen

I have a raspberry pi zero w and a 5 inch lcd touch screen with hdmi. I have the raspberry pi connected to the screen by HDMI. I am running the latest raspian OS on it. It boots up and starts just ...
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30 views

RPI File Browser for Touchscreen

I'm building a Webinterface for the RPi with a 7" Touchscreen. I'm running Raspbian Lite with xorg and chromium-browser. If I now wanna upload a file to the webinterface (by a html input), then there ...
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32 views

my 3.5" touch screen inverts the input of the touch

when ever i touch the top right of the screen and move to the bottom right the mouse moves from the top left to the top right i've already tried "display_rotate=2" and "lcd_rotate=2" but nothing ...
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1answer
611 views

Stream Deck Using PI 2

I have a RPi2 1gb. I've recently got a touch screen for it and have decided that I actually should use it for what it was intended for. Programming! So my adventure starts here. I want to make a ...
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1answer
188 views

Is it possible to power a 3b+ and the display with the poe hat?

For a project I would like to power the 3b+ and the official 7” touch display using the official POE hat. I figured that I could connect the display board to the pi via the jumper wires to 5v and GND ...
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1answer
219 views

Setting official touchscreen display boot-time brightness

I've got an official display, and having found other questions about setting the brightness I know I can change the brightness, and make a script that will run on boot, but that means the screen will ...
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1answer
196 views

Official touchscreen questions

I'm a French web developer so forgive my Englush I'm currently working on yet another in-car embedded Raspberry Pi project. I plan to build the software as a Chromium kiosk web app, served by a Node....
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1answer
169 views

Change GPIO pins for official Raspberry Pi 7" touchscreen

I need to use different GPIO pins with the Raspberry Pi official 7" touchscreen. I'm already using pins 3, 4, 5 and 6 with a hat, and it would be a pain to change them. I've looked through several ...
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1answer
287 views

Touchscreen GUI with control loop

I'd like to create a fullscreen-GUI on my Pi's 7"-touchscreen and I think this would be pretty easy to accomplish if I just wanna have some GUI that let's me click some buttons to control some GPIO-...
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1answer
87 views

Is it okay to power the Pi Touchscreen by plugging into the Pi?

I have the official raspberry Pi 7 inch touch screen, and I have mounted to it a Pi 2. Lately I have been using it and I have been plugging the power into the Pi itself. I however recently remember ...
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0answers
46 views

Java AWT full screen window / touch screen: mouse events “fall through”

I'm having a Scala (Java) app open a javax.swing.JFrame and put it to full screen; the physical display is a 3.5" touch screen on the GPIO. I just noticed that when I click on parts of my UI where ...
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2answers
97 views

PiScreen 3.5" TFT only shows white

I am attempting to set up a Zynthian Live Sampler (https://www.zynthian.org) which uses the Ozzmaker PiScreen 3.5" (http://ozzmaker.com/product/piscreen-3-5-tft-with-touch-for-the-raspberry-pi/) as it'...
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0answers
54 views

Relay for controlling backlight of touchscreen not reacting after a while

I connected my rpi3 to a 10" touchscreen. I connected the backlight of the touchscreen to a relay which I'm controlling via the GPIO pins. This is working fine for the first couple of minutes. But ...
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0answers
76 views

Powering a 7 inch touchscreen for the Raspberry Pi 3

I ordered a 7 inch hdmi touchscreen for the Raspberry Pi 3 on ebay and started developing my Python openCV application. So my setup is a Raspberry Pi 3 + webcam + 7 inch touchscreen powered via usb ...
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0answers
122 views

How to fix adafruit 7" display resolution problem on PI3?

I recently bought adafruit 7" display to be used with my PI3 to see if it will work. Well, it sort of works. The screen comes up everything is displayed but the resolution is screwed up. I have tried ...
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0answers
159 views

Raspberry Pi goes black on launching kivy application

After installing kivy on my raspberry pi model 3 b+ i tried to launch a simple kivy application. When launched the application just goes black instead of showing the buttons. import kivy from kivy....
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1answer
485 views

Raspbian Stretch Lite with Touchscreen - Chromium “Couldn't initialize SDL: No available video device”

I have a Raspberry Pi 3 B+, with the RPi 7-inch touchscreen hooked up. I installed Raspbian Stretch Lite on a 16GB SD card. I have booted the Raspberry Pi, changed my password, connected to Wifi, and ...
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0answers
1k views

Slow Refresh Rate on WaveShare 3.5" LCD (B) on RPi 3 B+

I've flashed StickyFingers-Kali-Pi-armhf-180607 to my Raspberry Pi 3 B+ with Waveshare 3.5" LCD (B). I update and configure the unit for my specific screen using the guide's instructions, entering the ...
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0answers
92 views

How could I draw a persistent overlay on the Official Touch Screen?

I have the Official 7" Screen connected to a Pi 3B V1.2. I want to create an overlay to be displayed on the screen at all times (regardless of whether I'm in a desktop environment like X, a CLI, etc.)....
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0answers
41 views

Large title bar buttons?

On the latest release of Raspbian, there's a new feature that allows you to change the UI settings to make it suitable for Large, Medium and Small displays. The setting for Large displays (among other ...
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2answers
552 views

Upside down screen on Pi with Kumantech 3.5"

On a pi B with raspbian-stretch, I have tried every tip I could find to get the touch screen to rotate 180 degrees: commands in config.txt, new drivers, using ./LCD-show 180, and more. Nothing works ...
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0answers
133 views

Problem with touchscreen Waveshare

I purchased a 5inch touchscreen WaveShark. Screen model I connected it to the board Raspberry Pi3 model B (OS Android Things) and it immediately displayed the contents of the program. After that, I ...
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1answer
150 views

My Raspberry Pi 3 B won't work with the touchscreen

So i've got a KeDei 3.5" touch screen Version 6.3 and i installed an image of Kali with the driver that's given of KeDei's website (http://kedei.net/raspberry/raspberry.html) but it hasn't been ...
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0answers
111 views

Pi3 + Waveshare touchscreen not work on start

i have a waveshare 7inch revices with rev.2.1. On the start i cant use the touchscreen. The touchscreen works only with the following steps: after the start unplug and plug the usb. What can i do ?
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394 views

Touchscreen programing

I have to do a project for school, the project involves raspberry Pi and its touchscreen. I'm new to Pi but I'm not new to programming by any means. My question is if i want to use the touchscreen to ...
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1answer
231 views

Waveshare 4.3inch HDMI LCD shows blank white screen

I have a Raspberry Pi 3 model B running the latest version of Rasbian Stretch. Yesterday I've received my Waveshare 4,3 inch display. First thing I did was build it in my project, due to save height ...
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1answer
65 views

What to look for in a touchscreen for RPi?

I would like to build a project on RPi with touchscreen, and wonder what to look for beyond the official (rather expensive) ones. How can I tell whether a screen will work or not? What kind of ...
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0answers
829 views

Auto-detect HDMI on boot (touchscreen attached)

I'm using the 7" official Raspberry Pi touchscreen, attached with a ribbon, on an RPi 3 Raspbian Jesse. This screen does not support displaying on both it and HDMI output simultaneously, so I can only ...
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1answer
285 views

PiTFT 3,5" Inverted X & Y

So for the last 3 weeks I have been trying to get this touchscreen(3,5" Resistive) to work properly, but I cannot, for the life of me, figure it out! I have made a very simple SDL 1.2 program that ...