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

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

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.

The doc is useless as are the libraries and samples. I'm running this on a teensy 3.2 and it finally works well. I'm using ILI9341_t3 library but took a few hours of playing and searching to figure out that i had to add tft.invertDisplay(1) to get the colors to be correct. The doc from the manufacture is terrible. The examples from the manufacture don't work and the libraries from the manufacture don't work. There are many typos in both and are not worth even looking at. At this point I'm not using the touch part of the screen and I am only just starting to play with the SD card

Good display and Hosyond provides reasonable online documentation. Only problem I had was using the SD card. The interface is shared and while there is a separate chip select, it becomes very unresponsive while using the screen/touchpad.

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.