Data Sheet

UCTRONICS 3.5 Inches 480 x 320 TFT LCD Touch Screen Display
Model: U4703
1. Introduction
UCTRONICS 3.5" TFT LCD display module is designed for Raspberry Pi zero/Pi 2 /Pi 3 Model B / B+ and can also be
used on other hardware platforms with have SPI interface. The 3.5" screen is the same size as the standard Raspberry
Pi model B/B+, and well mate with the Raspberry Pi boards. With its touch screen, it is suitable for portable devices and
projects, and it is a replacement for a heavy and bulky HDMI monitor, keyboard and mice. The highlight of this display
module, it supports plug and play without reboot the Pi, and SPI speed runs as fast as 32MHz to support games and
videos.
2. Specification
Support Kernel from 4.1 to 4.9
Support plug and play
Resolution: 480 x 320 pixels
Support touch screen
Interface: SPI
Support game and video
SPI speed: 32MHz
Automatic driver installation script
Dimension: 55.98 x 85.60 mm
Well mate with Pi Zero, Pi B+, Pi2 and Pi3
3. Hardware installation
Figure 1 Figure 2
The Figure 1 shows the display module pin out and dimension. Connect the 3.5inch LCD to the Raspberry Pi board like
the Figure 2 shows. Power on the Raspberry Pi board and make sure the internet is connected properly.
Note: LCD module pin1 should be aligned to Raspberry Pi board Pin1, misalign might cause damage.
4. Download and install driver
The LCD driver has been already installed in the Micro SD card shipped only with the kit that includes a Micro SD card.
The following steps are for install the driver on a clean system. All the installation steps are also available from our
github: https://github.com/UCTRONICS/UCTRONICS_LCD35_RPI/
Step1 Expand the Micro SD card
sudo raspi-config then Select Advanced Operations ->Expand Filesystem and hit YES, then go to Finish and you
need to run sudo reboot to reboot your Raspberry Pi.
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 Go to the UCTRONICS_LCD35_RPI
cd UCTRONICS_LCD35_RPI
Step5 Change the file permission
sudo chmod 777 UCTRONICS_LCD_backup
sudo chmod 777 UCTRONICS_LCD35_install
sudo chmod 777 UCTRONICS_LCD_restore
sudo chmod 777 UCTRONICS_LCD_hdmi
Step6 Backup original system data
sudo ./UCTRONICS_LCD_backup
Step7 Install the LCD35 driver
sudo ./UCTRONICS_LCD35_install
Wait for a while the system will be installed and restarted automatically.
If you want to reuse the original 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
If you don’t want to run those command to install the LCD driver, we also provide ready to use system image file
“UCTRONICS_LCD35_RPI.img". Please click the following link to download the system image file:
http://uctronics.oss-us-west-1.aliyuncs.com/LCD35/image/UCTRONICS_LCD35_RPI.img
Check the following link to install the win32diskimager tool in your computer. Then write the image file into the Micro
SD card.
https://sourceforge.net/projects/win32diskimager/
5. Add more functions to the LCD
NO1. Install calibration software for calibration
cd UCTRONICS_LCD35_RPI
sudo unzip Xinput-calibrator_0.7.5-1_armhf.zip