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Troubleshooting.md

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If you have any problems, please feel free to contact us and we will try our best to help you.

Q1:Some zones working much better than others, the near edge zones seem the worst.

You should recalibrate the touchscreen.

  • 1.Downloading our UCTRONICS_LCD35_HDMI_RPI package from https://github.com/UCTRONICS/UCTRONICS_LCD35_RPI.git

  • 2.Install calibration software for calibration

    • 2.1 cd UCTRONICS_LCD35_RPI

    • 2.2 sudo unzip Xinput-calibrator_0.7.5-1_armhf.zip

    • 2.3. cd xinput-calibrator_0.7.5-1_armhf/

    • 2.4. sudo dpkg -i -B xinput-calibrator_0.7.5-1_armhf.deb

    Alt text Alt text Alt text Alt text

Q2: How to write UCTRONICS RPI LCD3 5 Screen image to the SD card Windows?

  • You can refer to the below video :

Image can be downloaded from http://uctronics.oss-us-west-1.aliyuncs.com/LCD35/image/UCTRONICS_LCD35_RPI.img

IMAGE ALT TEXT

Q3: How to install the touchscreen driver and display driver for SPI LCD35

  • Step1: Expand the sd card first
 sudo raspi-config choose Advanced Operations -> Expand Filesystem
 sudo reboot
  • Step2: Update your raspberry pi system
 sudo apt-get update
  • Step3: Download the driver package
 sudo git clone https://github.com/UCTRONICS/UCTRONICS_LCD35_RPI.git
  • Step4: Come in the UCTRONICS_LCD35_HDMI_RPI
 cd UCTRONICS_LCD35_RPI
  • Step5: Get run permissions
sudo chmod 777 UCTRONICS_LCD_backup
sudo chmod 777 UCTRONICS_LCD35_install
``
``Bash
sudo chmod 777 UCTRONICS_LCD_restore
sudo chmod 777 UCTRONICS_LCD_hdmi
  • Step6: backup data
sudo ./UCTRONICS_LCD_backup
  • Step7: install our UCTRONICS LCD35 RPI driver
sudo ./UCTRONICS_LCD35_install

wait a while the system will be installed and restarted automatically.

if you want to reuse the pre-installation system, you can use the below command

sudo ./UCTRONICS_LCD_restore

If you want to display on hdmi instead of LCD,just use the below command

sudo ./UCTRONICS_LCD_hdmi

Q4: How to burn the UCTRONICS_LCD35_RPI.img?

http://uctronics.oss-us-west-1.aliyuncs.com/LCD35/image/UCTRONICS_LCD35_RPI.img

  • Step3: Open the SDFormatter to format your SD card

  • Step4: Open the Win32DiskImager to write the UCTRONICS_LCD35_RPI.img to your SD card.

For more details please refer to our video demo from https://www.youtube.com/watch?v=cCw91wH6mnc

Q5: Why the HDMI display stop at rainbow ?

After loading our LCD35 SPI driver, the system just support our LCD35 screen which means you can't use the HDMi screen.

Q6: Why the the screen is always white and doesn't display anything?

  1. Please ensure the hardware connection is normal.If the hardware connection is incorrect, the lcd will not work fine.

  2. Please ensure you have installed the LCD35 driver following the https://github.com/UCTRONICS/UCTRONICS_LCD35_RPI/blob/master/README.md if you don't install it , the lcd will not work fine.