Home Assistant Yellow

Sale price £151.67
incl. VAT
excl. VAT
Only 13 units left

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The foundation of your smart home needs to be local and private. Home Assistant Yellow is that foundation.

This is the Home Assistant Yellow Standard - the flagship version of Home Assistant Yellow, ready to go out of the box with a CM4 included! It comes pre-assembled in a custom enclosure with a Raspberry Pi Compute Module 4 (CM4) included and a custom heat sink for fanless, silent operation.

The CM4 is a version without wireless and has 2 GB RAM and 16 GB eMMC storage. Pre-installed with Home Assistant.

To get started, just plug in the included power supply and Ethernet cable. The cables are included in the box. This variant does not have Power-over-Ethernet. Home Assistant Yellow is Matter-ready, upgradeable, and extendable. You won't need anything else.

We also stock the Home Assistant Green!

Lithium Battery Shipping: Due to courier restrictions, this product can only be shipped within England/Wales. With this item in your cart your shipping options will be limited and may cost more than our usual rates. Why?


  • 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
    • 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 not working, details in 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)
    • 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)

Open hardware

We spend a lot of time and resources on fine-tuning our products. We want other people to be able to study our work and be able to make their own great smart home products. For this reason, we've released the schematics of Home Assistant Yellow as open-source. Explore the board and view the source.

Package Contents

  • 1x Home Assitant Yellow Standard, which includes:
    • 1x Pre-assembled Home Assistant Yellow
      • Includes carrier board, enclosure and a CM4 (non-wireless 2GB RAM, 16GB eMMC)
    • 1x Ethernet Cable
    • 1x 12V Power Supply (with international heads - UK, USA, EU and AUS)


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