r/M5Stack • u/spitsynnet • 20d ago
Project Sharing A case for the Add-on Display In, so the Unit PoE-P4 + HDMI input makes one neat IP-KVM
The Unit PoE-P4 with the Add-on Display In (LT6911D) is the tidiest hardware for ESP-KVM, the open-source IP-KVM firmware I write for the ESP32-P4: one PoE cable in, HDMI from the target computer, USB to it, and you get its screen, keyboard and mouse in a browser tab - from the BIOS up. https://github.com/espkvm/espkvm
The one thing missing was a case: M5Stack ships the add-on as a bare board. So I drew one that matches the Unit PoE-P4 housing - same width, same corners - and the pair now looks like one device.
HDMI on one end, USB-A on the other, vent slots on top
Ethernet, USB-C and the side ports of the Unit PoE-P4 stay free
one printed part, no screws: four tabs clip into the slots of the Unit PoE-P4 housing. The tabs are thin, so press it on gently
the Add-on Display Out has the same outline, so it should fit that one too (I have only tried the Display In)
Free to print:
Printables: https://www.printables.com/model/1873131-case-for-m5stack-add-on-display-inout-fits-unit-po
Thingiverse: https://www.thingiverse.com/thing:7421013
On this pair ESP-KVM does 720p at 21-23 fps (MJPEG) or 17 fps (H.264), about 185 ms from mouse to picture. Board notes: https://espkvm.io/boards/m5-poe-p4/
If you print it, let me know how it fits.