waveshare 4.2inch E-Ink Display Module Compatible with Raspberry Pi 4B/3B+/3B/2B/B+/A+/Zero/Zero W/WH/Zero 2W Series Boards 400x300 Resolution SPI Interface

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waveshare 4.2inch E-Ink Display Module Compatible with Raspberry Pi 4B/3B+/3B/2B/B+/A+/Zero/Zero W/WH/Zero 2W Series Boards 400x300 Resolution SPI Interface

Regular price: €82,28
Sale price: €82,28
Regular price: ~~€136,00~~
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Description

Provide online user manual (examples for Raspberry Pi/Jetson Nano/Arduino/STM32), please check the manual carefully before using!
This is an E-Ink display module, 4.2inch, 400x300 resolution, with embedded controller, communicating via SPI interface. Due to the advantages like ultra low power consumption, wide viewing angle, clear display without electricity, it is an ideal choice for applications such as shelf label, industrial instrument, and so on.
No backlight, keeps displaying last content for a long time even when power down
Ultra low power consumption, basically power is only required for refreshing
SPI interface, for connecting with controller boards like Raspberry Pi/Arduino/Nucleo, etc. Onboard voltage translator, compatible with 3.3V/5V MCUs

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Customer Reviews

Great display, they need to show its V2 so its easy to get runningTook a couple of days of trying demo after demo to get this working as no were does it list and i was not about to pull the display off to check that it was V2!! I kept trying every 2.13 demo and once i modded the code to talk to a V2, no problems and I just keep finding new stuff to add and try. Interesting how it works, made a clock/date with the temp of the pi for my demo and shows seconds counting well, love that it uses very little power allowing use of a powerbank. Also no heat! My 1.44 LCD feels warm since its an LCD. Other then they should list the version for what one they are selling, would have made my life easier, no complaints or problems, even want to get the yellow,black,white one next.4Good idea - but too limited to be usefulOne of the previous reviews pointed out that this is a good idea that has too many limitations to be truly useful. The biggest issues for me are in the warnings that accompany the product:1. Don't leave it on very long - it will damage itself.2. Don't leave a long term image on the screen when you turn it off.3. Don't do partial screen updates (this module seems to have left that functionality out anyway)Those warnings negate most of the advantages of this display. Other e-paper vendors I have talked with do not have these limits.The serial communications, and the functions, appear to work reasonably well, but let me be clear on what happens:o You clear the display and buffer.o You issue commands to the buffer, like draw text, or draw a filled circle.o You then send a refresh command to get what you've drawn to appear on the screen.o The entire screen is drawn black for about a secondo Your new screen image appears in about another second.I'm not sure where you'll find a good use for this display. It can't be used for really rare changes, because the image will, according to the warnings, 'Burn in' if you leave it too long. It can't be used for data that updates often, because the black then white refresh cycle will convince anyone that it's probably broken or buggy.All that's a shame, because the implementation and documentation are surprisingly good for this kind of thing.2Awesome Hardware, Flimsy Documentation (read on for good sources)I recently purchased one of these for a project and the hardware is great. Two things worth calling out though:1. The documentation on the manufacturer's site has many typos and in most places doesn't actually work for the 3-color version of the display (probably copy paste error from the 2-color version). I catalog all the proper install and tutorials on github in a repo called: avirtuos/waveshare so don't worry about finding docs and tutorials.2. The refresh rate is super slow! 30 seconds for a full refresh on the 7.5 inch 3-color. Just keep that in mind. The Amazon description didn't do a good job calling that out. I was expecting the typical 2 - 3 second refresh, nope. I haven't found a good example for partial refresh yet (if it is even possible).4white color looks pinkthis display does not look like the one pictured here. I received one that look like it is pink, red and black. Looks like the image here is photoshopped to make it look more white then it actually is. I purchase another smaller display too, with yellow,white,black colors and it looks great, exactly as expected.2I love itThis is a nice product I like the colors on the display , but I wish if it can draw the frame faster than 15 secI have a tutorial about it at youtube4I have the 2.7inch versionI got it working first with it plugged directly onto the header because I could not find the pinouts.Now that I have found them I wanted to share. (see images)Color : Pin NumberRed : 1 (or 17) : 3.3vBlack : 6 (or 9,14,25,30,34,39) : groundwhite : 11purple : 18blue : 19green : 22yellow : 23orange : 24Red is 3.3v and can alternately go on pin 17Black is ground and can go on any of these pins: 6, 9, 14, 25, 30, 34, 395Waste of potential, not enough features to be usefulA real bummer because this has all the parts of a great module - a programmable Cortex M4, lots of flash, SD card reader, etc. But there's no schematic or code for the actual module itself, only for using UART interface from a host machine, and the code they've included just isn't good. For instance, there's no way to have text wrap down the screen or read how much display space it will occupy, and the only font they include (which can't be altered or replaced) isn't monospace, which means it is IMPOSSIBLE to have text neatly fit the screen in all cases. A line full of "l"s or "i"s might be way shorter, and one full of "W" will go off the side. Plus the refresh times are programmed to be really, really slow and you can't change them. So it's basically unsuitable to ever become an e-reader or any other kind of practical text-based device.This is a shame because it's a nice screen, and the chips they put on the module would be great if they just had any documentation about them. A custom written library for this could be really amazing, and I hope they eventually release it because it'll make this more than worth the money. But for now you should never buy this screen when you can get the https://www.amazon.com/gp/product/B07DH5C8DL/ at half the price. It will have all the same functionality screen-wise, though you'll need to run it with an arduino or other microprocessor over SPI. But at least on that device you can use community code libraries or make your own!TLDR: this device operates on crappy closed-source code that almost certainly can't do what you want it to do. Skip and buy the SPI version.2Ordered 4, received a smattering of different board revsGot some V1's that worked, some V2's, and some V1's that didn't work that might have been a different board rev (?)As for the boards themselves, it would be nice if Waveshare could do the following:- Each board should have 2 connectors so they can be daisy-chained- Kill the DC pin. All data and configuration should go through MOSI.- Kill the BUSY pin. That should go through MISO. Why can't things be plain old standard SPI and not SPI + a few other random pins?It would be ideal if the boards could have VCC, GND, MOSI, MISO, SCK all daisy chained and one CS pin for each display. There should be NO need for any other wires. Keep things simple!1Zero complaints. Enjoying this too much!Works great. The documentation is pretty good, but steps you through a number of steps that are no longer necessary on Raspbian Stretch. The example software worked perfectly. With a few evenings coding I can send it nearly any image and it does a fairly good job rendering it in only three colors.I purchased it to be a goofy nametag, but some of the images are so good I now want to do more with it. I bought the hat so it might have a useful job when not in service as a nametag. The buttons are a bonus that I plan to play with in the future. Very nicely done, I would very much consider using this for a data collection device output. That just gave me a great idea to trigger a screen update with the current IP address on button press. Current Pi hardware at toy pricing makes me giddy with the potential combinations of this hardware.I still don't know how long an image lasts because I keep refreshing it a few times a day. It goes at least 12 hours. It makes perfect renditions of three color cartoon characters like Sam Sheepdog, Sylvester the cat, and Pepe Le Pew. Handles nearly anything that came back from a google image search for black and red.5Check your voltage. Otherwise, excellent display!This has proven itself to be a great little display, once I figured out how to get it working. The DPI is excellent, refresh is quick enough, and using the GxEPD library even gives partial refresh ability. Someone else complained about a missing cable, but mine came with one.Something I had to learn the hard way: This display is VERY sensitive to low voltage. It needs 3.3v, so I plugged it into the 3.3v line on my Wemos D1 Mini. It wasn't working at all, but tweaking the wires on the cable would make it refresh, but fail. At first I thought the cable was bad, but I checked each wire and it was fine. Then I thought they sent me a bad display. In my frustration, I decided to check my D1... turns out it was only delivering 3.26v. I checked another D1 I had, and it is putting out 3.36v, so I switched the display to that one and it has been rock solid. Be aware, in case you have problems.5

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waveshare 4.2inch E-Ink Display Module Compatible with Raspberry Pi 4B/3B+/3B/2B/B+/A+/Zero/Zero W/WH/Zero 2W Series Boards 400x300 Resolution SPI Interface

Description

Shipping and Returns

Customer Reviews

waveshare 4.2inch E-Ink Display Module Compatible with Raspberry Pi 4B/3B+/3B/2B/B+/A+/Zero/Zero W/WH/Zero 2W Series Boards 400x300 Resolution SPI Interface

Categories

Headsets

Computers

Laptops

Mobile menu

waveshare 4.2inch E-Ink Display Module Compatible with Raspberry Pi 4B/3B+/3B/2B/B+/A+/Zero/Zero W/WH/Zero 2W Series Boards 400x300 Resolution SPI Interface

Description

Shipping and Returns

Customer Reviews

waveshare 4.2inch E-Ink Display Module Compatible with Raspberry Pi 4B/3B+/3B/2B/B+/A+/Zero/Zero W/WH/Zero 2W Series Boards 400x300 Resolution SPI Interface

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