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

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.

Ok, this is great little screen and it pares up really nicely to an ESP32. Google 320x240 SPI Serial ILI9341 with ESP32. It does take a little tweaking in the Arduino IDE. There are 9 wires that go to 12 (I think) pins on the screen. There are several examples that are included with the Arduino library that will help show off the features and give code examples. I have not tried the SD card, so I cannot speak to that but a lot of other people commented on how well it works. There is an included stylus, but I really only used that during the initial setup. It is a resistive touch display, so no multi touch. The nice thing with resistive touch is that it works with gloves on.

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

These lcds are perfect in every manner, size, easiness to use, memory card slot but it has ghost inage problem. Would be better without it.

If you wire it up correctly, this thing flies. It handled my specific need with ease. The touch functions work well. Fair notice, you need an Arduino Due in order to get enough speed from your micro controller to drive this high color unit. I like the fact that we can wire directly to the pins and we don’t have to use a shield. That makes it perfect for my application.

The product works really well when using the hardware interface. However, when using it with an Arduino board it uses up all but one PWM pin and all the SPI pins. I was hoping to dedicate the display to one Arduino and use the SPI bus to link several units and display data from them. Not possible. I'll have to find another solution.

For first screen I've ever written a program for I am honored to have you. It's the perfect little thing not to hard to use and the language once you get use to it easy to understand. Thank you.

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.

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.