ELEGOO UNO R3 Touch Screen

Superb value for money. Arrived quickly and was well packaged. I set it up by downloading a pre made image from lcdwiki dot com and flashing it to a micro SD card. inserted it into the Pi and Voila, up and running. The refresh rate is slow but usable, at least for my use case it is. Very happy with Elegoo, less so with Amazon who said my original review did not meet their guidelines, I guess that's the way the world is going with AI

I'm happy with this module, it comes with a micro-SD card reader, touch layer, and TFT Liquid Crystal Display all in one. I didn't expect much to work properly given this board is 4 times cheaper than the well known touchscreen display on the market. But I've been happily surprised. Everything works smoothly, and the touchscreen is accurate in reading points across the entire surface. (There is NO calibration issue as you control the offset in code yourself) The card - being a shield - means you can just line up the pins on the board to the mount holes on the Arduino, and the card pushes firmly into place. The mini CD that comes with the device (see below for a link) has all you need to get it running, the drivers, libraries, and example code. Once I'd placed the libraries into the Arduino system, I opened the 6 examples and they all ran without issue. It was great! The build quality is excellent - the surface mount chips are all soldered well, the display is mounted cleanly on the PCB. You even get a little plastic stylus for the capacitive touchscreen. Warning! You might need to power your Arduino board along with the USB power. I found my little laptop couldn't power the bright white screen LED's, RGB screen, and Arduino all at the same time. The Arduino would repeatedly "unplug", and then "replug". Once I'd supplied extra power through the Arduino jack plug, it stayed connected. No more brown-outs. I might just buy another one to build a permanent project. -------------------------------- As you NEED to know what the electronic details are, I've included the CD contents on my site: Untamed Dot Co Dot Uk The link is right at the top, and includes the PDF's of the datasheets and libraries and examples. The missing manual. (At least on the product page) Key features: Driver chip : LGDP4535 (The CD also includes data sheet for the ILI9341) Level converter : 5v to 3.3v Screen resolution : 320 x 240 Screen colour: RGB, 65,000 colour. Uses 8 bit parallel bus. Includes Micro SD card holder. Includes Arduino libraries and examples.

Good little screen for the Arduino, if you have a UNO (or clone) you can load up the demos and have it working in minutes. All the demos just worked in my clone UNO. The resistive screen is a little hit and miss, it tends to need a prolonged press rather than a dab. If you watch the data from polling the position, you'll see a lot of null results and a report approx 1 in 10 to 1 in 20 times which is likely what causes the sluggish feel. The screen also isn't perfectly supported so you can feel it flex when pressing in some areas. A little better with the stylus, but does work with a fat finger. The colours and graduations are good and the provided library does everything I've asked. I'm data logging temperatures so having the ability to create a touch based menu and create charts with a few line drawing commands is very useful. The only downside is that with a UNO this screen uses almost all the pins. A5 is free which you can use in digital or analogue mode and digital pins 0 and 1 can theoretically be used but as these are shared with the USB serial interface to flash and debug your results may vary. Using a Mega eliminates this problem as there are lots of other interfaces, however you then need to manually rewire the SD card interface as the Mega pinout is different. The official screen uses a different interface which leaves a lot of pins free but is slower to refresh. Overall a good additional if you can live with the limitations (Uno) or spend a little more on a Mega.

Using mine with a Uno as a UART to touch display interface. I have a mega that controls my home heating, and through a ~10m long UART connection, I can control and display via the touch screen. The library I found had the incorrect touch pins configured, so if you have touch problems (no detection) double check your #defines. I was also unable to fully configure the touch calibration using the example code (right edge was not detecting), but through trial and error got the correct calibration values. A few suggestions/tips. Although the SD card works, using the sd lib requires a lot of SRAM (512 bytes are required for sd card block writes), so thats 25-30% of the uno's memory space right there. So for my own scenario, I instead wrote code that reads in from the UART buffer to directly write to the display, parsing for commands to set text colour, position etc. By deleting functions/code not required for my exact tft screen, I freed up alot of space. If you are using the screen for something simple like me, its possible to use an uno, however, anything more complex and it does not have the memory to really do anything useful (and only has the UART pins free), so I would recommend a mega. I was also worried that I would REQUIRE the pen for any useful touch input, but the screen is extremely responsive to touch, more than I thought possible with a resistive panel. Edit: I purchased a second one, both going great left on 24/7.

Really good touch screen for the price. You have to push quite hard I find but once you've adapted to it's capabilities it's really easy to use. Easy to set up and interact with in code. The layout is HTML although you can use a wrapper that makes life a little simpler if preferred.

This screen doesn't work, and I don't mean to say that it's broken, it just doesn't do what it's supposed to do, because it isn't capable of it. I have tried for days to get it working with my Pi Zero WH. I have some experience with Pi's, I have 5 of them serving various different purposes across my network. I found numerous forum posts across the internet posted by users in the exact same boat, and tried everything suggested. The closest I've been able to this screen actually doing the job it's supposed to is with the 2017 image recommended by the installation instructions, and even that will only display the startup code sequence, and goes blank and unresponsive once the GUI's loaded, and that's with the image the manufacturer says should work with the screen out of the box!. This will not work with up-to-date versions of the OS. I've tried various versions of the OS, various drivers and various suggested fixes. Nothing works! I see that some people state they have been able to get it working, but I've committed as much time as I'm willing to and will have to find another screen for the project. If you are willing to put in the time, and have the required level of expertise, then you might be able get it working, it might work on other hardware. But I bought this as a neat little easy to use touch screen to pair with a Pi Zero for a simple project, and it just isn't!

Edited review: I decided to try another one of these screens since writing the first review and have changed my review from 3 to 5 stars as the unit I got was clearly a rogue defective unit! I contacted Elegoo and their customer service team were great so after looking around and not finding much else suitable for my project, I took a risk and tried the screen again. The new screen works as advertised and was bright and colourful! The touch screen feature clearly worked well this time and was everything I had originally hoped it would be. I haven't used the SD card as it doesn't suit my project, but if everything is as good as the rest I would be happy with it. Really blown away this time and glad I gave the screen a second chance! Both screens came well packaged and with lots of documentation and examples. Yeah, glad I tried this again! Original review: I was looking forward to receiving this item as I had plans for a project that would use it. When it arrived I was surprised to see that it was in "Shield" form, meaning that it fit directly into the pins of my UNO compatible. It was well packaged and came with a small stylus. Initially, the screen worked well and was bright and colourful. It worked well and does exactly what it is supposed to. My only gripe with the operation of the shield was the "touch" features of the touchscreen. In my case they were not very sensitive and trying to get something to happen via the supplied example sketches the screen cracked. Now this might have been me being a bit heavy-handed, but I don't think so... From the first day of trying this (a week ago) I've been somewhat suspicious that something was not quite connected correctly... Most of the arduino based products from Elegoo have been great... this one has been ok.

Works fine using instructions from LCDWiki. Don't try to use any other instructions as there is no mention of this on Elegoo's UK website. The Quick Start guide on the US website is out of date and points towards websites that 404.