Home Assistant Yellow: Your Smart Home's Local and Private Foundation

As smart home technology continues to evolve, maintaining privacy and local control is paramount. Home Assistant Yellow provides a solid base for anyone looking to build or upgrade their smart home infrastructure with a focus on these key aspects.

Customize Your Setup with Home Assistant Yellow Kit

Offering flexibility and adaptability, Home Assistant Yellow is now available in two distinct kit versions, each tailored to suit different user needs and preferences.

Option 1: Home Assistant Yellow Kit (with Power Supply)

• Includes carrier board, custom enclosure, power supply with international adaptors (UK, USA, EU, AUS), heatsink, fixings, ethernet cable, and HA stickers.
• Perfect for users who have their own Compute Module 4 (CM4) and prefer a flexible setup to configure memory and storage according to their needs.
• Minor assembly required to put together a powerful Home Assistant setup.

Option 2: Home Assistant Yellow Kit (with Power-over-Ethernet)

• Includes everything in Option 1 but is designed to be powered via PoE (Power-over-Ethernet), making it ideal for seamless integration without a separate power supply.
• Connect directly to PoE-ready routers or switches for a clean setup.
• Ideal for users looking to reduce cable clutter and who have access to PoE infrastructure.

Advanced Features and Specifications

• CM4 Compatibility: Works with all 32 variants of Compute Module 4.
• Matter-ready and Extendable: Supports Zigbee 3.0, OpenThread, Matter protocols and comes with a Silicon Labs MGM210P Mighty Gecko Module for integrated smart-home wireless capabilities.
• Connectivity and Expansion: Features Gigabit Ethernet, USB ports, and an M.2 socket for NVMe SSDs to boost your smart home's storage and speed.
• Durable and Aesthetically Pleasing Design: Enclosed in a translucent, tool-free assembly custom enclosure designed for both functionality and visual appeal.

Open Hardware Initiative

Committed to innovation and community engagement, the schematics of the Home Assistant Yellow are open-source, allowing enthusiasts and developers to explore, modify, and create their own smart home solutions based on its design.

Features

• 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 lithium 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 Assistant Yellow Kit (Standard or PoE version - select before adding to cart), which includes:
  • Carrier board (only the PoE version has PoE functionality)
  • Custom enclosure
  • Heatsink
  • Fixings
  • Ethernet cable
  • A couple of Home Assistant stickers
  • Standard version only: 1x 12V Power Supply (with international heads - UK, USA, EU and AUS)

CM4 not included. Power supply not included with PoE version