Hosyond 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.

I was impressed with the overall quality of the unit. The screen had good color, decent brightness, and the touchscreen seems accurate. It was easy to set up from the seller's website, Arduino libraries were easy to find and install. Unfortunately, I'll be returning the screen due to a faulty card reader. The display and touch still work, but I'm concerned with longevity, so I'll be getting something a little better.

Functions on a part time basis. The LCD display and touch sense work occasionally. Not many drivers available for the FT6336U sensing chip. Frequently receive I2C errors and device freezes. Not recommended. Returning.

Es un excelente display, fue fácil programarlo, hay muchos ejemplos en internet, lo estuve probando con un STM32F411CE Blackpill y funciona muy rápido, recomiendo el producto. La entrega fué rápida y el producto llegó sin daños.

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.