pi 3.2 inch tft lcd screen supplier

Raspberry Pi is a Palm Size computer that comes in very handy when prototyping stuff that requires high computational power. It is being extensively used for IOT hardware development and robotics application and much more memory hunger applications. In most of the projects involving the Pi it would be extremely useful if the Pi had a display through which we can monitor the vitals of our project.

The pi itself has a HDMI output which can be directly connected to a Monitor, but in projects where space is a constrain we need smaller displays. So in this tutorial we will learn how we can interface the popular 3.5 inch Touch Screen TFT LCD screen from waveshare with Raspberry pi. At the end of this tutorial you will have a fully functional LCD display with touch screen on top of your Pi ready to be used for your future projects.

It is assumed that your Raspberry Pi is already flashed with an operating system and is able to connect to the internet. If not, follow the Getting started with Raspberry Pi tutorial before proceeding.

It is also assumed that you have access to the terminal window of your raspberry pi. In this tutorial we will be using Putty in SSH mode to connect to the Raspberry Pi. You can use any method but you should somehow be able to have access to your Pi’s terminal window.

Connecting your 3.5” TFT LCD screen with Raspberry pi is a cake walk. The LCD has a strip of female header pins which will fit snug into the male header pins. You just have to align the pins and press the LCD on top of the Pi to make the connection. Once fixed properly you Pi and LCD will look something like this below. Note that I have used a casing for my Pi so ignore the white box.

For people who are curious to know what these pins are! It is used to establish a SPI communication between the Raspberry Pi and LCD and also to power the LCD from the 5V and 3.3V pin of the raspberry Pi. Apart from that it also has some pins dedicated for the touch screen to work. Totally there are 26 pins, the symbol and description of the pins are shown below

Now, after connecting the LCD to PI, power the PI and you will see a blank white screen on the LCD. This is because there are no drivers installed on our PI to use the connected LCD. So let us open the terminal window of Pi and start making the necessary changes. Again, I am using putty to connect to my Pi you can use your convenient method.

Step 2: Navigate to Boot Options -> Desktop/CLI and select option B4 Desktop Autologin Desktop GUI, automatically logged in as ‘pi’ user as highlighted in below image. This will make the PI to login automatically from next boot without the user entering the password.

Step 3: Now again navigate to interfacing options and enable SPI as show in the image below. We have to enable the SPI interface because as we discussed the LCD and PI communicates through SPI protocol

Step 4: Click on this waveshare driver link to download the driver as a ZIP file. Then move the ZIP file to you PI OS. I used Filezilla to do this, but you can also use a pen drive and simple copy paste work.  Mine was placed in the path /home/pi.

Step 7: Now use the below command to restart your Pi. This will automatically end the terminal window. When the PI restarts you should notice the LCD display also showing the boot information and finally the desktop will appear as shown below.

You can also watch the video below to check how the LCD is connected and how it responds to touch. I am pretty much satisfied with its default accuracy so I am not going to do any calibration. But if you are interested you can view the official wiki page from waveshare where they discuss how to calibrate and enable camera view on the LCD screen.

Hope you understood the tutorial and were successful in interfacing your LCD with PI and got it working. If otherwise state your problem in the comment section below or use the forums for more technical quires.

When you want to have an easier time of connecting to different media and selecting it, a single-board computer is an efficient option. The Raspberry Pi single-board computers work with a variety of peripheral devices, including LCD display modules with touchscreens. On eBay, you can find a variety of sizes and features of affordable Raspberry Pi touch screen units to pair with the single-board computer for enjoying your favorite media.What are some features of Raspberry Pi Touch Screen modules?

Automatic power off: If the touchscreen is not used within 10 minutes, it automatically powers off. This time can be adjusted to turn off in less or more time.

Signal support: It accepts EGA, SVGA, WXGA, VGA, SXGA, and UXGA video signals from the computer.What are the sizes of Raspberry Pi touch screen modules?

The Raspberry Pi touch screen modules are available in sizes of three to seven inches when measured on the diagonal. Their frames can be set up in a vertical or horizontal orientation for viewing in a portrait or landscape setup. The stands for the touchscreens can also be angled for easier use and viewing. See the manufacturer site for details.What is the compatibility of a Raspberry Pi display module?

The following are compatibility options for a Raspberry Pi touch screen display module:USB: They can display the information that is stored on a removable USB drive plugged into the Raspberry Pi computer.

Consider the following features when you are shopping on eBay for a new or used Raspberry Pi touch screen:With computer case: Some have a case for holding both the computer and the display in one unit.

2) Log into the command line interface for Raspberry Pi（Initial user name: pi, Password: raspberry）, Get the latest drive from GitHub (the raspberry pie needs to connect to the Internet), Execute the following commands:

NMLCD-32QAis a colour active matrix LCD module incorporating amorphous silicon TFT (Thin Film Transistor). It is composed of a colour TFT-LCD panel, driver IC, FPC and a back light unit and with a Resistive Touch Panel (RTP). The module display area contains 240 x 320 pixels. This product accords with RoHS environmental criterion.

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