3.5 inch 320x480 IPS Capacitive Touch Screen LCD Module SPI Serial ST7796U Driver for Arduino R3/Mega2560

Using this on a teensy 4.1. Had a few problems at first: ST7796 driver didn't work, so used Arduino_ILI9341 - works fine! Runs up to 110mhz spi on my teensy with good clean soldering and short cables. FT6336U didn't work at first - bad driver code from github (aselectroworks/Arduino-FT6336U - don't use this doesn't work - has a 10ms delay in the readbyte code e.t.c. lol), so cobbled together my own from github "strange-v/FT6X36" driver. Had trouble with that as well - had to delay 300ms on power up before using the FT - else it would't init at all. Also had problems with the FT cutting out while SPI display was updating - All these problems were caused because my CPT reset pin wasn't being used - did not connect it and so it was floating and SPI triggered it - just tie it to VCC if not using it. You can also tie the LCD reset to GND and CS to VCC with a 4.7k resistor if your only using 1 display. Now everything is working great - it's a great display with a nice slick and easy CPT touch interface! With LVGL I get 30fps no problem without using the fast t4 code library.

Was going crazy trying to figure out why I couldn’t get this thing going. This thing has the newer ILI19488 chipset, eSPI_TFT has a profile for it. Follow the pin mapping in the profile preset, it works. To the seller: Seriously, update the listing, you wasted too much of my time. Screen looks great, documentation exists, the touchscreen seems to be hard to deal with, though i may have gotten a bad unit

Using this with an Arduino Mega 2560. First off, it just works. The display is top notch with black levels nearing OLED levels. The colors are bright and the images are sharp. The documentation is superb. The provided character font is not great. If I could figure out how to load a better font, it would get 5 stars. There is some text in the documentation suggesting it can be done, but I have not found any details on how that is accomplished. For static text, I just use a bitmap with a better font. My perspective is one of an EE with over 50 years of hardware and system software design experience.

Unfortunately, the SD slot is instable and causing issue on this product. The screen is great though.

Decent quality IPS screen. Capacitive touch is okay. This display has a different pixel setup than most other IL9341 LCD units (inverted, check pixel order too) and the screens are mounted kinda poorly so they don't sit flush on the board. Not sure I'd buy these over other similar LCD units again.

This is a very nice display. It is bright and crisp. Colors look really good. When it arrived I was pleasantly surprised to find that it already had the header soldered on! It worked right out of the box. I used an ESP32 MCU to drive the display. I used the Adafruit_GFX and Adafruit_ILI9341 libraries in the Arduino IDE and they worked perfectly. The only issue I had was, as a couple other reviews have mentioned, the colors were inverted. However this was easily remedied using the tft.invertDisplay(true) command that is found in the Adafruit_ILI9341 library. I tested it with several different programs. One simply displayed a full screen photo-realistic image, one was an ioT project that pulled weather data from online and displayed it on the TFT, one was another ioT project that read the time from a time server and displayed it as an analog clock. The last one was a test of the touch screen. It uses an FT6336 chip to drive the touch screen and I2C for the touch screen communication. I used a library I found called FT6336U to interface with the touch screen. The library expects the display to be in portrait mode ( 240 W X 320 H). I use mine in landscape mode (320 W and 240 H) so I had to do a few code tweaks to get it to work in landscape mode. Once they were done the touch screen functioned perfectly. It was accurate and responsive. I really like this display and would recommend it to anyone who needs a cool display to go along with their projects.