BIGTREETECH Pi4B Adapter V1.0 for Raspberry-Pi CM4, BTT CB1 V2.2/CB1 eMMC/CB2 Core Board Compatible SKR Mini E3 V3.0/SKR V1.4 Turbo/Octopus V1.1/Pro to Running Klipper for Voron/CoreXY/i3 3D Printer

Purchased to Load and test a CM4-Lite, Worked with no issues and arrived quickly... Not much more to say about it... has an SD card slot on bottom that does the job. tested with 4k30fps video got a bit choppy... but thats more of a pi4 thing..

I recently upgraded my CR-10 S5 with the BIGTREETECH Manta M5P+CB1 V2.2 Core board, aiming to switch to a 32-bit processor running Klipper. As someone with experience in assembling and upgrading 3D printers, I found this background crucial, especially given the lack of printed documentation with the board. While there is a manual available on their GitHub, this isn't mentioned in the package, which can be a hurdle for those not in the know.The manual itself, once found, has its gaps. I had to draw on my past experience and various online resources to correctly configure the board. For instance, I initially mis-wired the endstop connectors and had to redo them. Also, determining which fan connector was for the hotend versus the part-cooling fan required extra research. Moreover, there was no guidance provided for connecting the BigTreeTech TFT35 screen, even though it's marketed as compatible with this board.Despite these documentation challenges, I managed to set up the board relatively quickly. Performance-wise, it's excellent. The board runs Klipper smoothly and handles the printer, screen, web interface, and downloads all at once with no issues. As someone more accustomed to Marlin firmware, Klipper's power and convenience have been impressive.The integrated Klipper processor on the board is a significant plus, making it easier to manage than a separate Raspberry Pi - a bonus considering the current availability issues with the Pi. Overall, I'm very satisfied with the Manta board and CB1 core's performance. It's a solid choice for those looking to upgrade, provided you're prepared for some DIY troubleshooting and setup.

I have 2 of these now since it is almost impossible to find an actual pi. I had real trouble with the first one I bought in getting it to work correctly. BTT support was slow to answer but they did finally make it right buy replacing the CB1, After that it has worked great so I bought another and it worked the perfectly the first time I tried it. I believe that they have worked out the bugs and now they are a good product. I will probably be buying another.

This board is great in that it is almost identical to a Pi 4 model B in its layout—the ports are all in the exact same places, though the DSI and CSI display/camera connectors are slightly different due to the Compute Module's positioning. Also missing is any USB 3.0 (that is replaced by two extra USB 2.0 ports), and there is no PoE HAT compatibility. The Ethernet port is labeled as 1Gbps, but will only be 10/100 if you buy BigTreeTech's CB1 board instead of a CM4.There are a few dipswitches for setting write protect, flashing eMMC, etc., but they are very tiny and hard to reach, you need a tiny tool to get in there if you want to use this board to flash a device.There's also a 5V/GND header to plug in a non-PWM fan at the edge of the board.Overall it's put together well and works great with both a CB1 and CM4 that I've tested.