Hosyond 4.0 Inches 480x320 TFT Touch Screen LCD Display Module SPI ST7796S Driver for Arduino R3/Mega2560

Update to previous review! Turns out the problem was the Ardunio Mega 2650 I was using had a faulty voltage regulator on the 3.3V outlet so SPI communication would not work correctly. I tried a NodeMCU ESP8266 instead with the TFT_eSPI library by Bowder and it all works. And a MUCH simpler setup (no level shifters, etc) Touch sensitivity is a bit sluggish but acceptable for what I need to do so all is well at a great price! Previous review... Could not get it to work - the classic "white screen" problem. Note that unit requires level shifters to work with Ardunio Mega 2560 - that's not evident in the initial product description so read ALL the details carefully. It does comes with documentation and libraries you can download from vendor site but examples did not help and after checking and rechecking wiring and level shifter setup I gave up. Will try another brand.

works very well. easy to set up. compatable with ESP32 and Arduino

Nice little display. I didn't like their touch driver but was able to use a dofferent one.

The Hosyond 3.5 Inches TFT is an ILI9488 -- this doesn't have a default Adafruit driver in the Arduino IDE -- you have to manually install the library from GITHUB and edit the User_Setup.H file to get this screen to work successfully with an ESP32. It took me some time to get it working properly. In retrospect, the 3.2 inch display is an ILI9341, and works out the box, with the standard Adafruit ILI9348 library. The extra 0.3 inches wasn't worth all the trouble. I'll get the 3.2 screens from now on. The unit works fine and is a good display, once you get it working. There are no instructions with the screen, so you have to go searching for how to get it to work.

Very nice display! Worked great, and with AI, I was totally able to use this and learn. I liked it so well, I bought another. Use AI, know which driver the display needs, and start creating! And I'm a newbie with non-oled displays. But treat the display nicely! I cracked my first one by dropping it, so it was totally my fault.

If you have a lot of patience, you might eventually get this TFT display to work. It says it is compatible with Mega2560 but not out of the box it isn't. And the Mega2560 does not directly plug into the display like a lot of other TFT displays do. That means you have to run individual wires and probably have to use an ESP32 instead. Overall the website is extremely misleading and returning to Amazon (recvd used unit!).

These can work with 5V Arduinos, but require 3.3V signals. I've had other 3.3V stuff work with 5V Arduinos, so I initially tried the 2.4 inch version with NO voltage conversion. This did NOT work. I then tried using resistors to form a voltage divider to get approximately 3.3V and this did not work either. Not sure if due to an error on my part or not. Having all those resistors on a breadboard is asking for a short so there may have been one. I ended up getting the 3.5 inch version and used the level shifters listed below. This worked well. I was not sure if the 2.4 inch screen was OK or if I fried it with 5V. I tried it by swapping it directly out with the (working) 3.5 inch setup and it worked as well. It seems that while it will not work with 5V, it is not guaranteed to kill it either. I have NOT tested the SD or Touch interfaces yet. Level shifters: https://www.amazon.com/dp/B07F7W91LC?psc=1&ref=ppx_yo2ov_dt_b_product_details

The screen worked great, had decent color and viewing angels. However I could not get the touch driver to work correctly. I tested this display on Arduino, ESP32 and Teensy 4.1 with the same results, no touch. And yes I was using the stylus. I tried various touch drivers and pin options, but could never get it to work. Everything the vendor suggested also would not work. I would recommend skipping this board and spend the extra $2 on the capacitive touch display this vendor offers.

Ça fait plusieurs mois que je l’utilise et ça fonctionne toujours très bien Très facile à programmer

Graphics test works, constantly crashes when touch pins and calibration test are ran. Been at it consistently for a work, 3.3v to 5v changed my strap pins, tried everything and nothing gets the touch to boot properly

After libraries were installed and wired the LCD screen correctly to my Arduino UNO, all I got was a blank white screen. No matter what I did—installing new libraries, reconnecting every pin, going through youtube videos to find solutions—it still only displayed a white screen. Had to return it because I suspect something is either wrong with the test case codes they provide or the LCD screen itself is faulty. Documentation was fairly confusing too.