kuman 3.5 inch tft lcd display install quotation

I have a perfectly running Raspberry Pi 3 Model B, with a Raspbian Distribution on a 16 GB SD-Card. I connected a Screen with a HDMI-to-DVI Connector to it, a Mouse and Keyboard and I also have SSH access. Further I got a Kuman 3.5 Inch Touch-Display, which I want to use on it. I read myself through the Internet enough that I know I can"t use the Screen and the HDMI-Screen simultaneously. So I connected the Screen to the right Pins, the Backlight already works. So I take the Drivers that are sent with it. Searched the one for my Distribution, extracted the Script onto my Raspberry Pi and launched it through./LCD-35 in the terminal. After a few seconds it Reboots and the Color-Test appears. The Screen for the NOOBS-Recovery-Mode appears, which I can still use, then a few seconds later:

UPDATE: I installed a IMG of Raspbian sent with the Display, which worked, let"s say 50 %. It worked as a mini-screen, but not more. The touch wouldn"t work. I tried to calibrate it, read and did the instructions for my screen, but nothing helped. It"s not the original problem but I"d still rather install it on a working system without the special Raspbian.

Understanding that many people have problems configuring their Kuman TFT display on the Raspberry Pi together with RetroPie, I have decided to make this step-by-step of how to install the Kuman TFT 3.5" display which you can connect directly to the GPIO ports of the Raspberry Pi and run your applications. A lot of people have been buying this Kuman display from Amazon and other online markets for its economical price but it is not an easy display to install for certain applications, compared to other displays that come with integrated HDMI ports that will surely be a lot easier to manipulate and start working.

I advise you to buy a GPIO cable or a ribbon cable to connect the display to the Raspberry Pi, because sometimes (and it happened to me) at the time of manipulating the display and fitting it on the pins of the Raspberry, the screen being so the thin can be broken easily.

Verify that you have RetroPie burn on your SD Card, if you have not already done so, click on the following link, install it and come back here to continue the steps.

Next, copy the following code to download the best driver from Github:git clone https://github.com/goodtft/LCD-show.gitchmod -R 755 LCD-showcd LCD-show/chmod +x LCD35­-show./LCD35­-show

If, after installing, the screen is a mess together with the TV missing icons or words, please connect via SSH to your Raspberry Pi and run this command:cd RetroPie­-Setup/sudo ./retropie­-setup.sh

The previous command will open the Retropie configuration file where in the end you have to look for something like SPEED and FPS and change the values to something like:dtparam=audio=ondtoverlay=tft35a,speed=62000000,fps=40,rotate=90#dtoverlay=ads7846,cs=1,penirq=17,penirq_pull=2,speed=25000000,fps=20,keep_vref$gpu_mem_256=128gpu_mem_512=256gpu_mem_1024=256overscan_scale=1

In this Arduino touch screen tutorial we will learn how to use TFT LCD Touch Screen with Arduino. You can watch the following video or read the written tutorial below.

For this tutorial I composed three examples. The first example is distance measurement using ultrasonic sensor. The output from the sensor, or the distance is printed on the screen and using the touch screen we can select the units, either centimeters or inches.

As an example I am using a 3.2” TFT Touch Screen in a combination with a TFT LCD Arduino Mega Shield. We need a shield because the TFT Touch screen works at 3.3V and the Arduino Mega outputs are 5 V. For the first example I have the HC-SR04 ultrasonic sensor, then for the second example an RGB LED with three resistors and a push button for the game example. Also I had to make a custom made pin header like this, by soldering pin headers and bend on of them so I could insert them in between the Arduino Board and the TFT Shield.

Here’s the circuit schematic. We will use the GND pin, the digital pins from 8 to 13, as well as the pin number 14. As the 5V pins are already used by the TFT Screen I will use the pin number 13 as VCC, by setting it right away high in the setup section of code.

I will use the UTFT and URTouch libraries made by Henning Karlsen. Here I would like to say thanks to him for the incredible work he has done. The libraries enable really easy use of the TFT Screens, and they work with many different TFT screens sizes, shields and controllers. You can download these libraries from his website, RinkyDinkElectronics.com and also find a lot of demo examples and detailed documentation of how to use them.

After we include the libraries we need to create UTFT and URTouch objects. The parameters of these objects depends on the model of the TFT Screen and Shield and these details can be also found in the documentation of the libraries.

So now I will explain how we can make the home screen of the program. With the setBackColor() function we need to set the background color of the text, black one in our case. Then we need to set the color to white, set the big font and using the print() function, we will print the string “Arduino TFT Tutorial” at the center of the screen and 10 pixels  down the Y – Axis of the screen. Next we will set the color to red and draw the red line below the text. After that we need to set the color back to white, and print the two other strings, “by HowToMechatronics.com” using the small font and “Select Example” using the big font.

Here’s that function which uses the ultrasonic sensor to calculate the distance and print the values with SevenSegNum font in green color, either in centimeters or inches. If you need more details how the ultrasonic sensor works you can check my particular tutorialfor that. Back in the loop section we can see what happens when we press the select unit buttons as well as the back button.

Kuman 3.5 inch 320*480 Resolution Touch Screen TFT LCD Display With Protective Case + 3 x Heat sinks+ Touch Pen for Raspberry Pi 3 Model B, Pi 2 Model B & Pi Model B+ SC11

ads7846_device model=7846 cs=1 gpio_pendown=25 speed=1000000 keep_vref_on=1 swap_xy=1 pressure_max=255 x_plate_ohms=150 x_min=184 x_max=3869 y_min=141 y_max=3959

But when I try to calibrate with the display up then I see only issues without any systematic diagnosis. Touch simply does not react at all!!! Or leads the cursor to the edge.

mastermushi"s suggestion to revert to an older version of Raspbian is not an option for me. I"m adding this LCD to an RPi board already up and running, and I"m not gonna reconfigure everything again. I gave up on getting the touch to work properly in X, and I"m now gonna use the official RPi 7" screen instead.

When I plug screen in, it works, but only covers about 80% of the screen. The right-most 20% is blank. No matter what changes I put in (that I read on this forum), the display will not fill in the right side.

My Touchpanel 18,5inch. I have Raspberry pi 3 v2.8.1. I use it with mouse smoothly. There is a 10 mm side gap in the touchpanel. Calibrate touchpanel could not solve my problem.

Display brilliant colors on the Displaytech 3.5 inch TFT LCD module! This LCD display has 320 x 240 RGB resolution and uses the NewVision NV3035C single chip digital driver. The TFT driver IC supports 16M colors allowing for a range of hues to be displayed and can also support up to 22 different types of input video formats within RGB, CCIR656, and CCIR601 video formats. The 3.5” TFT is available with a touch screen panel in either resistive (single-finger or stylus pressure) or capacitive (five-finger, multi-gesture) touchscreen technology.