Waveshare 2PCS 2.13inch E-Ink Display HAT V4 Version, Black/White Two-Color 250x122 Pixel E-Paper for Raspberry Pi 5/4B/3B+/3B/2B/Zero W/WH/Zero 2 W/Jetson Nano SPI Interface, Support Partial Refresh

E-ink is perfect for micropower applications - it takes almost no energy to display an image so battery life is greatly expanded. Interested in trying these out.

Overall, these are great displays and have much lower power requirements than my previous LED displays. Physical instructions are not included with this kit, however a link to Waveshare documentation is available in this product's description. The documentation can also be found by searching Waveshare's website for documentation on their 2.13 inch e-paper display. The instructions I primarily followed were for Raspberry Pi and Python3, which worked well. It was easy to follow and I was able to run the V3 example. I also followed the instructions for C on Pi, but ran into GCC errors I have not yet taken the time to diagnose and are likely related to the state of my Pi more than the provided instructions. With the documentation, there is also a good technical overview of the product, and care instructions. These cannot be always powered on like LED or LCD displays, so certain timings and limits should be practiced to keep them from becoming damaged, including limited runtime, frequent refreshes, and not leaving the paper in a committed state for too long without a refresh or full clear.With this product, you get two e-paper displays. With each display you also get a SPI breakout cable for attaching to other devices or a breadboard with header pins. Also included are small bags for each display that contain mounting screws and spacers, however I have not yet figured out how these would be used as there are no thru-holes on the displays themselves.My only minor critique with this product is that the SPI connector, while very appreciated, adds a bit of thickness to the other side of the display opposite of the GPIO header connector. On the two Pi computers I tested the GPIO connector, the SPI connector rests on top of the center USB port on the PiZero2, and rests on the processor on the Pi4, which can get hot for certain applications. It is likely to rest on the processor for older versions of the regular Pi as well. In the pictures provided, note that I do also have a small heatsink on the Pi4, but without this heatsink the SPI connector would still be resting on the processor if the GPIO was fully depressed. On the PiZero, if I fully depressed the GPIO connector the display would rest at an angle due to the SPI connector. In either case, if using this display exclusively on a Pi, the SPI connector may be something worth looking at desoldering fully off or replaced with something more slimline. Otherwise, this display may be better suited for just SPI applications or GPIO over a GPIO ribbon cable.Outside of that one critique, I do not see this as a major flaw as this display is intended for use on microcontrollers as well without using the GPIO header, so this is definitely a good solution with flexibility for either approach. Desoldering the SPI connector, if necessary, should be fairly straight forward as it is surface mounted with the soldered pins set behind the connector and are accessible for desoldering.

This two-pack of Waveshare 2.13" E-Ink Display HATs (V4) is a fantastic option for adding low-power, high-contrast displays to your Raspberry Pi projects. The black and white e-paper screens are crisp and easy to read, and the support for partial refresh makes them suitable for applications where you need to update specific portions of the screen without refreshing the entire display. The SPI interface ensures easy connectivity, and the compatibility with various Raspberry Pi models (including the Pi 5, 4, 3, Zero, and Jetson Nano) makes them a versatile choice. Having two HATs is perfect for multi-display projects or experimentation.I was able to install this on my Raspberry Pi Zero 2 W and utilized a fork of the Pwnagotchi project that supports the Zero 2W, it works great for this purpose, and I haven't had any issues to speak of yet.

Works great for raspberry pi. Comes in a pack of two so you can use multiple devices with it. Quality of display is good and clear. I'm still working on finalizing which project is good for for these. As you can't frequently update the display with eink.

The media could not be loaded.  There are library existing and works well on the nano. However, cable jumper is messy and very loose.I would suggest to make a shield or hat PCB instead, looking forward testing on the Raspberry Pi Mini