• Carrier board for Raspberry Pi Compute Module 4 (CM4)
  • CM4 board-to-board connector
  • Supports direct boot from NVMe devices (e.g., for CM4 Lite)
  • 12 cm x 12 cm
  • Compatible with all 32 variants of CM4
    • Quad-core Cortex-A72 (ARMv8) 64-bit / 1.5 GHz
    • Up to 8 GB RAM
    • Up to 32 GB eMMC
    • Regulatory approval does not cover wireless variants
• Integrated smart-home wireless (Silicon Labs MGM210P Mighty Gecko Module)
  • Supports Zigbee 3.0, OpenThread, and Matter
  • 2.4 GHz radio with TX power up to +20 dBm
  • 1024 KB flash program memory, 96 KB RAM data memory
  • Pre-installed with Zigbee 3.0 firmware (EZSP), can be upgraded
• Expansion slot
  • For NVMe SSDs (M-Key)
  • M.2 socket M-Key
  • Supports 2230, 2242, 2260, and 2280 modules
  • PCIe x1
  • Note: Google Coral AI Accelerator doesn’t work in the expansion slot. For details, see this issue
• Gigabit Ethernet
• 2 x USB 2.0 Type-A host port
• 1 x USB-C 2.0 device port (Silicon Labs CP2102N USBXpress USB bridge)
  • UART mode (default): debug USB-to-serial adapter
  • USB mode: CM4 USB 2.0 interface for USB recovery

• High-quality stereo audio DAC
  • 2 V RMS line-out on 3.5 mm audio jack
  • SNR 106 dB
• 2 x Push button
  • Red: Factory reset
  • Blue: To be determined
• RTC backed by CR2032 battery
• Status LEDs (can be powered off during regular operation)
  • Red: Power
  • Green: Disk usage
  • Yellow: Home Assistant system state
• Power
  • 12 V / 2 A through barrel DC power jack (5.5 mm x 2.1 mm)
  • Ethernet: PoE+ IEEE 802.3at-2009 Class 3 or 4 (selectable via jumper)
  • Typical power usage
    • Idle ~1.5 W
    • Idle with NVMe ~2.5 W
    • Load ~5-9 W
• Enclosure
  • 123 mm x 123 mm x 36 mm
  • Translucent injection-molded polycarbonate plastic
  • Tool-free assembly
  • Accommodates custom heat sink (included)

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