The brightness value is stored to the non-volatile memory, and updated in every button click or DDC/CI brightness command.

Thirdly, Insert the SD card into the card reader, and connect with computer, and select the image system and the device, and then click “write”, as below:

The display supports 0, 180º rotation of the lcd view area, without changing settings at the RaspberryPi or PC.  Its useful for simple customization of the display usage, but after rotation the touch needs to be re-calibrated.

Wait for about 2 minutes, the driver would be installed and reset automatically, insert the 3.5″ HDMI screen and turn on.

You can install the touch driver for 3.5″ HDMI touch screen based on the existing system, but it just supports Raspberry Pi OS.

After execution, the driver will be installed. The system will automatically restart, and the display screen will rotate 90 degrees to display and touch normally. （ ‘ XXX-show ‘ can be changed to the corresponding driver, and ‘ 90 ‘ can be changed to 0, 90, 180 and 270, respectively representing rotation angles of 0 degrees, 90 degrees, 180 degrees, 270 degrees）

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.

The display can be powered from RaspberryPi GPIO +5V pin, or from external power adapter. 5V/1A external power adapter is enough for power supplying to the display.

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 message if there is no input signal.

Press brightness button, holding, then press power button, rotates the display 180 º, the rotation status is also saved to non-volatile memory

You can install the touch driver for 3.5″ HDMI touch screen based on the existing system, but it just supports raspbian system.

Wait for about 5 minutes, the driver would be installed and reset automatically, insert the 3.5″ HDMI screen and turn on.

①Backlight button: backlight brightness adjustment button, short press backlight changes by 10%, long press 3 seconds to close backlight

The power switch is 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 pin marked as “NC” below indicates that the LCD is not occupied by the pin, and the user can use it for other applications.

Image

If the display is plugged to the RaspberryPi GPIO connector, and powered from external power adapter through USB type-C cable, the RaspberryPi also can be powered from the GPIO +5V pin, and don’t need extra power supply.

6) Enter the following command in terminal to change the executable permissions of file:sudo chmod 777 LCD_show_35hdmi.tar.gz

Image

Secondly, Unzip the IMG system, and open your imager writer (recommend win32diskimager from: https://sourceforge.net/projects/win32diskimager/);

The OSOYOO 3.5-inch resistive touchscreen HAT is a versatile, high-quality display solution for STEM projects, industry and hobbyists. Suitable for the Raspberry Pi platform, the resistive touchscreen provides an easy way to display and interact with the information displayed on your Raspberry Pi.

Image

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.

Resolution 720*480(recommend): sudo ./LCD35_720*480Resolution 480*320: sudo ./LCD35_480*320Resolution 810*540: sudo ./LCD35_810*540

Raspberry Pi leads out 40 GPIO pins, while the screen leads out 12 pins. When connecting, pay attention to the corresponding pins and Raspberry Pi pins.

Step 4: Run the following command (Please don’t turn off Raspberry Pi, and it will reboot in 2 minites):sudo ./LCD35_hdmi

Firstly, Download IMG system in your computer from the raspberry pi official website： https://www.raspberrypi.org/downloads/

HDMI35 is designed for RaspberryPi 3/4 display, and can be used as a general purpose HDMI display.  Touch function is unavailable when using with pc/laptop through HDMI cable.

The 3.5-inch touchscreen HAT for Raspberry Pi is specifically designed to fit easily onto the GPIO pins of the Raspberry Pi. It connects seamlessly and directly to the GPIO array, eliminating the need to deal with additional cables or complex configurations. However, for applications that do not require a GPIO interface, a display can also be easily connected via the HDMI port for flexible integration and use of touchscreen functionality.

Greetings, friends: I recently purchased an OSOYOO 3.5 Inch HDMI Screen v2.0 through Amazon. I would appreciate it if you could send me the information on the screen’s GPIO ports to take advantage of the touch screen function. Thanks!

After execution, the system will automatically restart, and the display screen will rotate 90 degrees to display and touch normally. （ ‘ 90 ‘ can be changed to 0, 90, 180 and 270, respectively representing rotation angles of 0 degrees, 90 degrees, 180 degrees, 270 degrees） If the rotate.sh prompt cannot be found, use Method 1 to install the latest drivers