Review on UCTRONICS Raspberry Touchscreen High Speed Portable by David Batte

for details. I am using this screen on a Raspberry Pi 4B. So I have this screen, as well as the similar Adafruit 3.5"TFT+. Both are clickable, appear in a hat style, and both require drivers to be installed in order to work (neither of which you can just load from a fresh SD card first). Booted the card, I connected via SSH and installed the drivers, which at first glance seemed to be successful.There was a non-fatal error which caused the script to not be able to find the specific file it was trying to copy. It turned out that the installation script looks for the driver in kernel specific folders and automatically detects your current curnel and looks for the appropriate folder to get the driver Well my kernel version was 5.10.11-v8+ and there was no such folder in the installation directory I found the issue in their github repo: https://github.com/UCTRONICS/UCTRONICS_HSLCD35/issues/7 and this solved it for me. You can do the steps listed there manually or change the install.sh script and the "uname -a" part (which captures your kernel version) and replace it with the last available kernel folder. Anyway, now that that annoyance is gone, I like the display more than Adafruit's for the most part. The refresh rate when using a regular desktop is much higher. Still not PERFECTLY 60Hz/Desktop smooth, but not far off. Adafruit TFT+ draws noticeably slower, so I think the "high speed" claim is well deserved. Unfortunately, there is no way to adjust the screen rotation. Well, you can change the screen orientation in /boot/config.txt, but if you do that, touch registration will be done in reverse since touch drivers don't support rotation. So as a normal view only display you can just flip it in the config.txt but if you need to use the touch you can't flip it. Adafruit TFT+ offers 0,90,180,270 options and Tap recalibrates accordingly. As mentioned above, the refresh rate is annoyingly slow when used as an HDMI/FBCP mirror. This is also noticeable in console mode. I'd say they're pretty much comparable in terms of picture quality, but interestingly this UCTRONICS screen has a hardware backlight switch so you can turn off the screen backlight at will. Interesting, especially for my purpose as an astrophotography rig. . Finally - I couldn't find a way to setup this screen as a blank console display (like the Adafruit display allows) and I couldn't find much documentation for interacting with it in a more advanced version. , direct render projects like Adafruit. Issues with current drivers not working spontaneously after an OS update are real issues and who knows what long-term driver support I'll see, but for the price the screen is great if you're willing to troubleshoot.