MyElectronics 19 inch rack mount 1U for 1-4 pcs of  RASPBERRY Pi.

Product Information

With 8 thumbscrews, each Raspberry Pi can be removed from the front without taking everything apart for maintenance. House up to four SSDs (you will need SSD USB adapter cables to connect them to your Raspberry Pis). BitScope Blades work with Raspberry Pi Zero, A+, B+, 2 & 3, HATs, Displays and other BitScope products, and are available in three editions: Re-routing with PoE! Comes with mounting plates and rerouting boards with PoE functionality for the Pi 4B/3B+ - moves all of the I/O ports and SD card slots to the front, and adds a push-button switch to control the Pi easily

Four slots: There are four slots, which means you can fit up to four units of Raspberry Pi. The models of Raspberry Pi that you can fit are 1 Model B+, 2 Model B, 3 Model B, 3 Model B+, and 4 Model B. Applications: This is a hardware solution to get ingenious use of the Raspberry Pi, with this kit and open source software OpenMediaVault, you can use the Pi as a NAS Server, Surveillance station, or even a Web server The redesign allows for more boards along with a reduction in the number of parts. That takes less plastic and less time to print. The design is also modular, so there should be new components in the future.The installation is simple. Most of its extra features like the power button, LED, etc., are already assembled. Our Verdict on This Product While not Compute Blade’s “raison d’etre”, there is a GPIO that we can use. Just underneath the NVMe SSD slot is a 2 x 5 header which breaks out a select few pins, specifically for use with an optional RTC module. Thankfully these pins also include I2C, which means I could test a series of I2C enabled devices using Stemma QT interfaces. It has 5 0.91-inch OLED, 5 PoE Hat, 5 SD Card Adapter, 5 Power Button, and supports Pi 3 and Pi 4. Specs & Features We Loved Effective Cooling: The rerouting boards are assembled with a cooling fan, which provides powerful heat dissipation to keep the Raspberry Pi from overheating

Power Control: The included LED push-button switch allows you to perform a shutdown without having to run commands from the OS or unplugging power cables. It has everything from PoE HaTs to cooling fans to LED switch buttons. You can also find all your ports at the front, making it extremely accessible. I chose to test the I2C interface using CircuitPython, an easy install thanks to Adafruit. Connecting a BME688 temperature / humidity and air quality sensor was a piece of cake and within a few minutes I had data streaming across the screen. Moving to the “front” of the Blade and I spotted a push button with a neat 3D printed push mechanism. This button is connected to the GPIO and fully accessible via your favorite programming language. I ran a test using Python and can report that it works perfectly. Now I just have to work out what to do when I press the button. Easy setup: The installation and setup process is easy. You can fit it independently, and the OLED power buttons are already installed.You can also build and develop home automation, media centers, and servers for your databases and web apps. Our Verdict About this Product The UCTRONICS 19” 1U supports five Raspberry Pis and five SSDs, making it possible to increase the RPi cluster with massive network storage. This added feature makes it perfect for building a Raspberry Pi cluster. Specs and Features We Loved

Add command to the rc.local file: cd /home/pi/U6143_ssd1306/C sudo make clean sudo make sudo ./display & Printing 6 'frames' that hold the Pi trays and are put together through threaded rod running underneath. This 19" 1U solution holds 5x Raspberry Pi 4/3B+ boards (not included) and comes with 5x PoE HATs, 5x 0.91" OLED displays, 5x illuminated power buttons, 5x SD card rerouting adapters and tool-less removable trays for each board! It will keep all of your Raspberry Pi devices in one location. As a result, it can save space and ensure that you do not misplace your devices. Not to mention, it is an aesthetically pleasing and organized storage method.Note: the delivered product may not have white text on the front of the unit as displayed in the images. The only downside is that the fan is powered from the GPIO, which means that you can't use certain HATs, but then again a massive cooling fan is already in the way. Re-routing: It comes with rerouting boards, mounting plates, and PoE functions. You can find all the ports and switch at the front. But once I figured out I needed supports, and to be extra careful about bed leveling and shrinkage—compensated for by using a brim in this case—I was able to get the frames, trays, and ears printed without issue. The full process involved: