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This HDMI LCD is a touch screen which supports touch input and display. However, touch input function just works with Raspberry Pi OS for Raspberry Pi board. This user guide is for how to install touch driver for Raspberry Pi OS on Raspberry Pi.
OSOYOO 3.5 inch HDMI screen is designed for Raspberry Pi 3/4 display, and can be used as a general purpose HDMI display. When using with pc/laptop through HDMI cable, display function works, but touch function is unavailable.
– Power supply
The display can be powered from Raspberry Pi GPIO +5V pin, or from external power adapter. 5V/1A external power adapter is enough for power supplying to the display.
If the display is plugged to the Raspberry Pi GPIO connector, and powered from external power adapter through USB type-C cable, the Raspberry Pi also can be powered from the GPIO +5V pin, and don’t need extra power supply.
In this case, the external power adapter should be at least 5V/3A capable.
The Raspberry Pi and HDMI35 display do not support USB PD, and the input voltage is always 5V.
Power consumption:
– Button
The power switch is a toggle push button, toggles power on (normal mode) and power off (suspend mode) status. The power indicator led lights on when the display is suspended. DDC/CI function is always ready even it is in suspend mode, and the display can wakeup programmatically by DDC/CI commands.
The brightness button adjusts the LCD brightness by 10% step in 10~100% range.
The brightness value is stored to the non-volatile memory, and updated in every button click or DDC/CI brightness command.
The display supports 0, 180º rotation of the LCD view area, without changing settings at the Raspberry Pi or PC. It’s useful for simple customization of the display usage, but after rotation the touch needs to be re-calibrated.
Press brightness button, holding, then press power button, rotates the display 180º, the rotation status is also saved to non-volatile memory
– DDC/CI
The display’s brightness, contrast, colors can be updated by DDC/CI commands from HDMI port DDC channel (I2C port).
It also can enable or disable splash logo, HDMI symbol on the screen, standby feature. If the standby feature is disabled (disabled by default), the display always shows a message if there is no input signal.
– Filling screen area
The display supports automatic video scaling (RTD2660), and can show any kind of resolution (up to 1920×1080) video to the physical 480×320 view area.
When using on Win10/11 PC, the display sometimes does not fill the entire view area of the LCD, and could be shrinked due ratio mismatching.
In this case, It can be fixed by adjusting [Settings]-[Display]-[Advanced Display Settings]-[Refresh Rate] value.
You can install the touch driver for 3.5” HDMI touch screen based on the existing system, but it just supports Raspberry Pi OS.
Step 1): Download the Raspberry Pi Imager from Raspberry Pi official website: https://www.raspberrypi.com/software/
Step 2): Prepare a newly formatted micro SD memory card(TF card) with USB micro SD card reader, recommend sizes are 16G, 32G. If you don’t know how to format micro SD card, please run Raspberry Pi Imager and select “Erase” in Operating System field, and “your micro SD card” in Storage field, then click “WRITE” to format micro SD card
Step 3): Run Raspberry Pi Imager, then select “Use custom” in Operating System field then browse “Raspberry Pi OS” you have downloaded, then select “your SD card” in Storage field. (If you have burnt Raspberry Pi OS in your SD card, please skip step 3 to step 5)
Step 4): Click “setting icon” to enable SSH, set username and password (here we use pi as username and raspberry as password), and configure wireless LAN. Then click “SAVE”
Step 5): Click WRITE to burn OS system (Raspberry Pi OS) in your micro SD card
Step 6): Connecting HDMI LCD to your Raspberry Pi. Install screen on Raspberry Pi 2/3 with HDMI to HDMI adapter (as IMG 2-1). Install screen on Raspberry Pi 4 with HDMI to mini HDMI adapter (as IMG 2-2)
Step 7): Insert this card in your Raspberry Pi, and power on Raspberry Pi. (ATTENTION: Please be sure the Raspberry Pi have connected to network)
Note:
Step 8): Use a ssh tool to log into Raspberry Pi remotely. Run the following commands in terminal to switch user permission as administrator (when you’re typing new password and password in, the window shows nothing just null, but you’re in fact is typing things in. Please write down the password you enter and just focus on typing it right then press Enter.):
sudo passwd root
sudo passwd –unlock root
su root
Step 9): Run the following command in terminal to download the driver:
sudo git clone https://github.com/osoyoo/HDMI-show.git
Step 10): Run the following command in terminal to change the executable permissions of the folder
sudo chmod -R 777 HDMI-show
Step 11): Run the following command in terminal to enter the folder
cd HDMI-show/
Step12): Run the following command
sudo ./hdmi480320
Step 13) Run the following command to reboot your Raspberry Pi
reboot
Wait for about 1 minute till the screen turn on. The touch driver would be installed and reset.
Now you have completed to install the touch driver for 3.5″ HDMI touch screen.
If you have difficulty installing the driver, or if you still can’t use the display properly after installing the driver, please try our configured images for tested. DO NOT need any driver installation steps. Just need download and write the image into the TF card:
Step 1: Connect touch screen LCD display to your Raspberry Pi
Step 2: Download LCD screen driver RAR file from Download Link in the following table.
Step 3: Unzip the driver image file downloaded from step 2).
Step 4: Prepare a newly formatted Micro SD memory card(TF card) with USB Micro SD card reader, recommend sizes are 8G, 16G, 32G. If you don’t know how to format Micro SD card, please download SDFormatter from https://www.sdcard.org/downloads/formatter_4/.
Step 5: Download the Raspberry Pi imager tool from https://www.raspberrypi.com/software/, and use it to write image file (from Step 3) into TF card.
Image Name | Version | Support | Password | Download Link |
Raspios-Bullseye-arm64bit | 2024-3-12 | Pi5/Pi4/Pi3B+/Pi2/Pi3 | user:pi, password:raspberry | https://drive.google.com/file/d/1tCkFmrKFlqbx5IfD-QTcdvbjDLV6pKPm/view?usp=drive_link |
Raspios-bookworm-arm64bit | 2023-12-05 | Pi5/Pi4/Pi3B+/Pi2/Pi3 | user:pi, password:raspberry | https://drive.google.com/file/d/1Eg3idShAvVCzdXBD9LvKOql8qnAQltjK/view?usp=sharing |
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