Raspberry Pi 3 Compute Module was first introduced in 2017 with CM3 and CM3L systems-on-module with or without 4GB eMMC flash for $25 and up before the company launched an update earlier this year with CM3+ modules equipped with a slightly faster processor and up to 32GB eMMC flash for $25 to $40.
If you wanted to evaluate the solution for your project you’d have to spend well over $100 for either the official development kit or third-party solutions such as balenaFin which may not support all features of the modules out of the box.
Compute Module PoE board key features and specifications:
- SoM Compatibility – Raspberry Pi Compute Module 3/3+: CM3, CM3L, CM3+/Lite, CM3+/8GB , CM3+/16 GB, CM3+/32 GB
- Storage – MicroSD card slot
- Video Output – HDMI port, and DSI connector
- Camera I/F – 2x CSI camera connectors
- Connectivity – 10/100M Ethernet with 802.3af PoE support (based on Si3404 chip)
- USB – 4x USB 2.0 ports, 1x micro USB slave port to flash firmware to the module
- Expansion – 40-pin Raspberry Pi GPIO header for HATs and other expansion boards; jumper to set I/O voltage
- Debugging – Micro USB to UART for serial debugging
- Misc – Cooling fan interface; autorun on power-up OR controlled by IO pins; power and status LEDs
- Power Supply –
- 5V via Micro USB port
- PoE – Input 37V to 57VDC; output: 5V DC/2.5A
- Isolated SMPS (Switching Mode Power Supply)
- Dimensions – 114 x 84.4mm; 3.2mm mounting holes
You’ll find more hardware documentation in the Wiki, including the PDF schematics, as well as some software such as the code to control a cooling fan and the DTS file for the camera interfaces, but the board will obviously mostly rely on the Raspberry Pi Foundation software such as Raspbian or other compatible OS images.
I also noticed an enclosure for the board on the Wiki called CM-IO-POE-BOX that is sold for $49.99 with the Compute Module PoE Board, a fan, a power adapter, and assembly tools, but not the module for $49.99 and up on either Aliexpress or Seeed Studio.
Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011.