Volumio with 3.5" TFT Touch Screen (GPIO) RPi 3B+

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Ok, that’s something to start from :wink:

Since I don’t know in what state your Volumio installation is now, I recommend to start with a fresh Volumio system, i.e. start from scratch. Make sure to wair some minutes after the first boot of Volumio so the data partition can fully expand. Otherwise you will not be able to install the Touch Display plugin because of too less space.

The following is more or less a copy of my post above, but has been complemented for Volumio 3 (steps 9 and 10). I have also added steps 11 and 12, because “xserver-xorg-input-evdev” is required for the calibration settings in “99-calibration.conf” to take effect.

  1. Install the Touch Display plugin.

  2. Download the display specific overlay:

wget https://github.com/goodtft/LCD-show/raw/master/usr/tft35a-overlay.dtb

  1. Copy the overlay to “/boot/overlays/tft35a.dtbo”:

sudo cp tft35a-overlay.dtb /boot/overlays/tft35a.dtbo

  1. Open “boot/userconfig.txt”:

nano /boot/userconfig.txt

  1. Add the following lines:
dtparam=spi=on
dtoverlay=tft35a

It could be necessary to add a rotation value to the overlay later on.

  1. Save “/boot/userconfig.txt” by typing Ctrl+x then y and Enter.

  2. Download “99-calibration.conf-35-0” as it might be necessary to calibrate the screen:

wget https://raw.githubusercontent.com/goodtft/LCD-show/master/usr/99-calibration.conf-35-0

  1. Create “/etc/X11/xorg.conf.d” in case it’s missing and copy “99-calibration.conf-35-0” to “/etc/X11/xorg.conf.d/99-calibration.conf”:

sudo mkdir -p /etc/X11/xorg.conf.d
sudo cp 99-calibration.conf-35-0 /etc/X11/xorg.conf.d/99-calibration.conf

  1. Download “99-fbturbo.conf” with

sudo wget https://raw.githubusercontent.com/waveshare/LCD-show/master/usr/share/X11/xorg.conf.d/99-fbturbo.conf -P /usr/share/X11/xorg.conf.d

  1. Change the driver setting in “99-fbturbo.conf” from “fbturbo” to “fbdev”:

sudo sed 's/"fbturbo"/"fbdev"/' -i /usr/share/X11/xorg.conf.d/99-fbturbo.conf

  1. Install “xserver-xorg-input-evdev” by running

sudo apt-get -y install xserver-xorg-input-evdev

  1. After that execute

sudo cp /usr/share/X11/xorg.conf.d/10-evdev.conf /usr/share/X11/xorg.conf.d/45-evdev.conf

  1. Reboot.

  2. If the display should not have the orientation you are looking for, add a rotation parameter to the overlay in “/boot/userconfig.txt” so it looks something like this:

dtoverlay=tft35a:rotate=90

This would rotate the display (not touch) by 90 degrees clockwise.

  1. Reboot once again.

  2. If the display rotation appears to be correct now, check if the touch function is already properly aligned to the display. If this should not the be case try to find out by what amount touch has to be rotated. Then head over to the Touch Display’s configuration page and set this value in the rotation setting.

  3. Reboot and check if touch is properly aligned to the display now. It is possible that setting the rotation in the prior step does not suffice. This would be the case if the screen’s touch axes are inverted or swapped which is not uncommon on these kind of screens… Then you would have to find out how the axes are inverted or swapped to be able to find a correction.

Edit: Corrected command in step 3.

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