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34 votes
Accepted

Adjusting the Brightness of the Official Touchscreen Display

The driver for the screen provides an interface through /sys/. To turn the screen on you can use the command: echo 0 > /sys/class/backlight/rpi_backlight/bl_power and to turn it off: echo 1 > ...
Jacobm001's user avatar
  • 11.9k
26 votes
Accepted

How to permanently hide mouse pointer or cursor on Raspberry PI?

I simply added a nocursor option as follows in the file (/etc/lightdm/lightdm.conf) xserver-command = X -nocursor and it worked as it should. No cursor is displayed whatsoever. You can still put your ...
ThN's user avatar
  • 1,063
12 votes

Adjusting the Brightness of the Official Touchscreen Display

I've made a Python package for this: github.com/linusg/rpi-backlight. Now you don't need to implement this yourself anymore. (GIF is outdated because API was changed quite a bit in v2, sorry... Below ...
linusg's user avatar
  • 442
7 votes

Inverted GPIO Touchscreen (Using 99-calibration.conf)

Download First, download the file from this link waveshare-dtoverlays Instalation My touchscreen is Waveshare 3.5" LCD. I copied "waveshare35a-overlay.dtb" to "/boot/overlays" ...
Agusta Wicaksono's user avatar
6 votes
Accepted

New Touchscreen Project - GPIO or HDMI

The safest touchscreen would be one that is built for the pi and has in-tree kernel drivers so you do not get stuck having to use a manufacturer's OS image that is likely to fall (or already be) out ...
goldilocks's user avatar
  • 58.9k
6 votes
Accepted

3.5 Kuman touchscreen rotation

Assuming you have one of these (different size is fine too), they are compatible with/same as the waveshare products available here. Using LCD-show drivers and scripts I have posted the setup ...
Shreyas Murali's user avatar
6 votes

Rpi3B/Rpi4B ILI9341 / XPT2046 SPI 2.8" Touch TFT LCD Connection / Driver Problem

Question ILI9341 SPI 2.8" Touch TFT LCD Arduino Shield Rpi3B+ OK? How to connect? Short Answer (S1) Yes, it is OK to use the ILI9341 Arduino Shield for Rpi. The following is the wiring ...
tlfong01's user avatar
  • 4,675
5 votes

How can I develop a touchscreen GUI in Python?

You can try Kivy, this gives you a python multi-touch interface but has a lot of other stuff as well... https://kivy.org/
GSH's user avatar
  • 496
5 votes

New Touchscreen Project - GPIO or HDMI

In my opinion, one of the biggest advantages of using HDMI or DVI out is compatibility. Screens sold for the RPi that use a GPIO connector usually ship with a special image, and you're stuck using ...
Jacobm001's user avatar
  • 11.9k
5 votes

TFT LCD 3.5 display with inverted axis

Option "TransformationMatrix" "0 -1 1 1 0 0 0 0 1" worked for me too! after 2 afternoons of work it finally worked out Im using the 3.5 TFT GPIO verison - ADS7846 Touchscreen here is my file pi@...
Chris Rodriguez's user avatar
5 votes

How to make onscreen keyboard automatically pop up when entering input field

Florence virtual keyboard claims to have this feature (called "auto-hide mode"), which should work with modern applications implementing accessibility API (e.g. GTK+ and Qt 5): For a system-wide ...
Dmitry Grigoryev's user avatar
5 votes

Using the DSI connector on RasPi Zero W

The Pi Zero W only has CSI for connecting to a camera module, but it hasn't a separate DSI for connecting a display. The DSI connector is only present on the A/Bs (and CM, if I'm not mistaken). The ...
TheDiveO's user avatar
  • 1,591
5 votes

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

I had the exact problem as you. Found it was not possible due to the form factor of the Pi 3B+ when a PoE Hat affixed to it to fit in the "Smarti Pi Touch" case. Used a PoE Splitter (£9.90 in VAT ...
F1Linux's user avatar
  • 1,667
5 votes

Pi Official Touchscreen Dim on Timeout (Screensaver like)

With the assistance from this Forum, specifically Dougie I have a solution to my original question and this allows the Raspberry Pi Touchscreen to be dimmed (or completely off) gradually after a ...
jon Eskdale's user avatar
5 votes
Accepted

Raspberry Pi 4 touchscreen misbehaving when using a secondary monitor

The answer lies in this document: ELI Touch Screen Calibration in Linux First of all, we need to check the name of the display with the following command: xrandr For me, it was DSI-1. Then we need to ...
dJani's user avatar
  • 211
4 votes

New Touchscreen Project - GPIO or HDMI

The Raspberry Pi Foundation sells a 7" touchscreen that connects to the Pi's on board DSI port over a ribbon cable, and connects to the Pi's GPIO pins for power. I would go with this one, as it is ...
Matthew's user avatar
  • 141
4 votes

How to permanently hide mouse pointer or cursor on Raspberry PI?

To work with any X server (I'm using the stretch version), Edit the /usr/bin/startx file and change the defaultserverargs line to: defaultserverargs="-nocursor"
user3549962's user avatar
4 votes
Accepted

How can I install the KUMAN 3.5 inch-display?

Here are the drivers and the description of how to install the screen given by Kumantech. I got it working, and touch screen functionality also worked. I actually did this with combination with other ...
HelpNeeder's user avatar
4 votes

How can I install the KUMAN 3.5 inch-display?

Download the driver from here. Add to /boot/config.txt file the following lines: max_usb_current=1 hdmi_group=2 hdmi_mode=87 hdmi_cvt 800 480 60 6 0 0 0 Uncompress, move inside theLCD-show folder ...
jet's user avatar
  • 379
4 votes

Raspberry Pi Camera Not Showing Preview Onto Touch Screen

I don't think this works as intended. At least, the docs for the Python picamera library state that: The camera’s preview system directly overlays the Pi’s output on the HDMI or composite video ...
goobering's user avatar
  • 10.7k
4 votes
Accepted

Using RPi touchscreen as primary display, how to display image on HDMI?

Summary: Finally, my solution used the Kivy framework. Kivy is a graphical framework for Python and, critically for my app, has the ability to output to both the RPi's LCD touchscreen and HDMI. Kivy ...
Neex's user avatar
  • 91
4 votes

Kuman 7 inch LCD touchscreen compatible with Raspberry Pi Zero?

It's working with my zero. However you will need to adjust the settings to use the entire screen, just researching that now. The Kuman screen (which should come with the proper cable) is: Kuman ...
Paul C's user avatar
  • 41
4 votes
Accepted

Wifi not connecting depending on power supply

I stubled upon this hackaday post: https://hackaday.com/2019/11/28/raspberry-pi-4-hdmi-is-jamming-its-own-wifi/ I tried replacing the HDMI cable and that did the trick. Still strange that it worked ...
Nico's user avatar
  • 71
4 votes
Accepted

Set custom screen blanking time

I'm playing in the same corner right now but I want to turn off the blank during the day and let it happend off working hour so I have the info on hand, here it is. To view current settings: $ xset q [...
Rene Jr Purcell's user avatar
3 votes

Official 7in display touchscreen not working

I had a problem with display in general. I tried to update etc, but did not work until reinstall particular libraries following official tutorial. Try: sudo apt-get update sudo apt-get install --...
tomasz74's user avatar
  • 159
3 votes
Accepted

Touch gestures in Raspbian

The support for touch gestures seems to be limited. What I found: There exists a FireFox (Iceweasel) extension Grab and Drag that adds expected behavior (i.e. scrolling) to FireFox. Chromium supports ...
romor's user avatar
  • 166
3 votes
Accepted

What to look for in a large HDMI+USB touchscreen for raspberry pi?

So the monitor I tested (dell S2240T) worked perfectly. I am using SDL1.2 and its event structures to capture mouse left click press/release. I do not think multitouch works, but it is not needed for ...
Pathfinder_Tenso's user avatar
3 votes

What to look for in a large HDMI+USB touchscreen for raspberry pi?

The Dell s2240Tb is working out of the box with Raspian Buster on a Raspberry Pi 4, including two-finger zoom...
Scott Veirs's user avatar
3 votes
Accepted

Weird output on 7" HDMI/USB touchscreen

Since the same HDMI cable works fine with another machine and same Pi machine works fine with another monitor, my conclusion was that there is a software setting which should be fixed. I tried to ...
Ionică Bizău's user avatar
3 votes

Portable power supply for RPI3 and official touchscreen requirements

What requirements such as voltage and power regulations would I need to consider? First a warning about the fact that stated output voltage (in this case 5V) and current (for the 3 with nothing ...
goldilocks's user avatar
  • 58.9k

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