An open keypad-emulating decoder for DSC and Honeywell/Vista panels with an official local Home Assistant integration over socket, serial or USB. Communicates directly with the panel keybus via a local serial/TCP/USB link with no cloud service. Just note: Requires a compatible DSC or Honeywell panel.
Notes last checked Oct 19, 2026.
Compatibility snapshot
Home AssistantexcellentFull local control, no cloud needed. Native Home Assistant integration or a local protocol.
Apple HomenoneNo official support on this platform.
Google HomenoneNo official support on this platform.
AlexanoneNo official support on this platform.
Works offlineyes
Setupintermediate
Extra hub neededyes
Powerplug-in (power supply included in the appliance bundle)
Local control facts
Home Assistant: alarmdecoder integration, Local Push (home-assistant.io, checked Oct 10, 2026)
Why it stands out
Official AlarmDecoder integration, fully local
Strong choice for Honeywell/Vista panels and open tooling
No subscription or cloud
Reasons to hesitate
Requires a compatible DSC or Honeywell panel
Keybus wiring and configuration required
Arm-night behavior varies on some Vista panels
Best for
DSC/Honeywell owners (especially Vista) wanting an open, local bridge
Avoid if
you don't want to run a separate hub or bridge
Privacy and local-control notes
Communicates directly with the panel keybus via a local serial/TCP/USB link with no cloud service.
Home Assistant support: supported · integration path: AlarmDecoder (local).
Buying reality check
Price notes: $229.95 for the AD2PIBNDL appliance bundle (Raspberry Pi 3B+, AD2pi board, power supply, SD card and wall-mount case) on AlarmDecoder's own Square store, checked 2026-10-19. It was out of stock there at that check, as were the AD2USB, AD2Serial and AD2pHAT; the older alarmdecoder.com catalog page is offline while the vendor rebuilds it, and the vendor offers PayPal orders by phone in the meantime.
