3.5inch RPi LCD (A)

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3.5inch RPi LCD (A)
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3.5inch-RPi-LCD-A

3.5 inch Touch Screen TFT LCD Designed for Raspberry Pi
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Primary Attribute
Category: OLEDs / LCDs, LCD, Raspberry Pi LCD
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Brand: Waveshare
Website
English: Waveshare website
Chinese: 官方中文站点
Onboard Interfaces
RPi I/Os
Related Products

Introduction

3.5 inch Touch Screen TFT LCD Designed for Raspberry Pi

More

Getting Started

The RPi LCD can be driven in two ways: Method 1. install driver to your Raspbian OS. Method 2. use the Ready-to-use image file of which LCD driver was pre-installed.

Method 1. Driver installation

Description: The drivers are not available for NOOBS or any system installed by NOOBS.

If the touch screen doesn't work properly, please install the driver: LCD-show-170309.tar.gz, but not LCD-show-161112.tar.gz.

1. Configure your Pi:

sudo raspi-config

Set as:

  • Select Expand Filesystem.
  • Boot Option -> Desktop Autologin (may differ depending on Raspbian revision)

2. Copy the driver (choose the driver according to your OS) into your OS then Run the following commands:

tar xvf LCD-show-*.tar.gz
cd LCD-show/

Install the driver and it toggles the mode to LCD display: Note: Net work connection is required while installing driver to your Pi, or else the touch won't work properly.

chmod +x LCD35-show
./LCD35-show

Note: this LCD won't work after apt-get upgrade, in such cases, please edit the config.txt file in the SD card and remove this statement: dtoverlay=ads7846

3. After system rebooting, the RPi LCD is ready to use.

Method 2. Using Ready-to-use image

The image file with pre-installed driver is located in the IMAGE directory of the CD, or you can download it from #Image. Extract the .7z file and you will get an .img file. Write the image to your micro SD card (How to write an image to a micro SD card for your Pi? See RPi Image Installation Guides for more details). Then insert the card to your Pi, power up and enjoy it.

Toggle between LCD and HDMI display

Once this LCD is enabled, meanwhile the default settings for HDMI are changed. If you want to use another HDMI monitor, please run the following command:

cd LCD-show/
./LCD-hdmi

This toggles the mode to LCD display:

./LCD35-show

Screen orientation settings

After touch driver installed, the screen orientation can be set by these commands:

  • 0 degree rotation
cd LCD-show/
./LCD35-show 0
  • 90 degree rotation
cd LCD-show/
./LCD35-show 90
  • 180 degree rotation
cd LCD-show/
./LCD35-show 180
  • 270 degree rotation
cd LCD-show/
./LCD35-show 270

Touch screen calibration

This LCD can be calibrated using a program called xinput_calibrator which is pre-installed on the CD image. However, it was not pre-installed on original Raspbian OS. So in this case, you should get and install the program manually with

sudo apt-get install -y xinput-calibrator

Enter the following commands for touch screen calibration:

sudo DISPLAY=:0.0 xinput_calibrator

or select Menu -> Preferences -> Calibrate Touchscreen.

After running these commands, there will be a prompt for four-point calibration shown in the LCD screen. Click the points one by one to finish the touch calibration. Then, the new calibration data will be displayed in the terminal, as shows below. Please get these data for future use.

Doing dynamic recalibration:
Setting new calibration data: 3919, 208, 236, 3913

Enter the following command to edit 99-calibration.conf:

sudo nano /etc/X11/xorg.conf.d/99-calibration.conf

Then, the old calibration data will be displayed in the terminal:

Section "InputClass"
Identifier	"calibration"
MatchProduct	"ADS7846 Touchscreen"
Option	"Calibration"	"160 3723 3896 181"
Option	"SwapAxes"	"1"
EndSection

Modify the calibration data to the new calibration data displayed above):

Section "InputClass"
Identifier	"calibration"
MatchProduct	"ADS7846 Touchscreen"
Option	"Calibration"	"3919 208 236 3913"
Option	"SwapAxes"	"1"
EndSection

Press the keys Ctrl+X, and select the option Y to save the modification.

The modification will be valid after rebooting the system. Enter the following command for system reboot:

sudo reboot

Notices: In case of inaccurate touch, please perform screen calibration again and reboot the system.

How to work with a camera

1. Select "Enable Camera" -> "<YES>"

sudo raspi-config

2. Copy the Camera driver to the OS of Pi then:

unzip camera.zip
cd camera
sudo chmod 777 Camera
sudo cp update\ camera/95-stmpe.rules /etc/udev/rules.d/

3. Create a file called wheezy.list.

sudo nano /etc/apt/sources.list.d/wheezy.list

Append:

deb http://archive.raspbian.org/raspbian wheezy main

Exit with save.

4. Create a file called 10defaultRelease.

sudo nano /etc/apt/apt.conf.d/10defaultRelease

Append:

APT::Default-release \"stable";

Exit with save.

5. Create a file called libsdl.

sudo nano /etc/apt/preferences.d/libsdl

Append:

Package: libsdl1.2debian
Pin: release n=jessie
Pin-Priority: -10
Package: libsdl1.2debian
Pin: release n=wheezy
Pin-Priority: 900

Exit with save.

6. Last, execute the commands:

sudo apt-get update
sudo apt-get -y --force-yes install libsdl1.2debian/wheezy
sudo apt-get install evtest tslib libts-bin xinput
sudo apt-get install python-pip 
sudo apt-get install python2.7-dev
sudo pip install picamera==1.10 
sudo reboot
sudo TSLIB_FBDEVICE=/dev/fb1 TSLIB_TSDEVICE=/dev/input/touchscreen ts_calibrate

Camera will be enabled by the steps above.

Resource

Image

Description: if you felt hard to install driver, try the image with driver pre-installed.

Driver

The drivers are not available for NOOBS or any system installed by NOOBS.

If the touch screen doesn't work properly, please install the driver: LCD-show-170309.tar.gz, but not LCD-show-161112.tar.gz.

Software

LCD Panel Dimension

FAQ

Question:
Why does the touchscreen not work well?
Answer:

Now, we only provide touch screen drivers for Raspbian and Ubuntu Mate. How to install the driver? See:#Method_1._Driver_installation


Question:
Why does the image in the CD not work on my Pi?
Answer:
  • The image in the CD may differ depending on batches, however, some Images are just available for Pi 2 (or before, but not for Pi 3). In such cases you can download the latest version from Raspberry Pi website and install the driver. See:#Method_1._Driver_installation
  • Make sure the hardware connection is correct and connects fine.
  • Make sure you've written the image to your SD card using the software File:Win32DiskImager.zip rather then just copy and paste.
  • It is strongly recommended to use a stand-alone 5V/2A power adapter, because the USB port of PC might not have enough power to support the Pi and LCD.


Question:
What are the power requirements?
Answer:
When working with 5V input, the current is about 115mA.


Anti-Piracy

Since the first-generation Raspberry Pi released, Waveshare has been working on designing, developing, and producing various fantastic touch LCDs for the Pi. Unfortunately, there are quite a few pirated/knock-off products in the market. They're usually some poor copies of our early hardware revisions, and comes with none support service.

To avoid becoming a victim of pirated products, please pay attention to the following features when purchasing:

RPi-LCD-Anti-Piracy.jpg

(Click to enlarge)

Beware of knock-offs

Please note that we've found some poor copies of this item in the market. They are usually made of inferior materials and shipped without any testing.

You might be wondering if the one you're watching or you've purchased in other non-official stores is original, feel free to contact us.

Support

Mail.png Contact your seller (fast response and most recommended)

or send emails to service@waveshare.com (not fast enough but please be patient) for help.

Our working time: 09:00-18:00 (UTC+8 Monday to Saturday)