---
id: platform-signage
area: platform
level: 3
title: "Artefact — Signage infrastructure · screens as a managed fleet"
claim: "HDMI-CEC control of power · rotation · mirroring and multi-screen layout — so a display fleet is driven by the platform rather than by a remote control."
confidence: delivered
period: "2014–"
tech: [HDMI-CEC, Raspberry Pi, Python, JavaScript, FFmpeg]
metrics: [{label: "commercial deployments evidenced", value: "salon · financial services business"}]
artefacts: []
public: true
last_verified: 2026-10-26
tags: [platform, signage, hdmi-cec, artefact]
---

The CEC command set and a layout diagram land in Phase 7.

## What the artefact is

The platform side of the signage product: the codes and control path that switch screens on and off, rotate and mirror output, and lay out multi-screen displays, including synchronised playback across screens in one site.

## What it proves

Device-level control combined with fleet management. This is the same skill the edge pages show on small devices, applied to physical displays that other people depend on.

## Confidence

`delivered` — this ran in commercial deployments. The product's business status is stated separately on the Products pages, where the honest position is that the software is being rebuilt and three businesses still run it.