Native Apple Home Firmware for the AC Infinity AirTap ESP32 Upgrade Kit with HomeSpan and PlatformIO

team@silocitylabs.com (Silo City Labs) — Wed, 06 May 2026 00:00:00 +0000

The SiloCityLabs ESP32 Module for the AC Infinity AirTap T4/T6 already gives Home Assistant users a clean way to upgrade an AirTap vent into a connected smart-home device. The current ESPHome firmware path supports the important hardware pieces: PWM fan control, onboard temperature sensing, OLED display output, physical buttons, panel lockout, and newer IR receiver support on supported builds.

But there is another smart-home audience that could benefit from this hardware: Apple Home users.

If you’re in the Apple ecosystem, using HomePod, Siri on iPhone, Apple TV, scenes, automations, and the Apple Home app, the natural question is: Could the AirTap ESP32 upgrade kit run native Apple Home firmware instead of ESPHome?

Yes it can! HomeSpan provides developers with libraries to create an ESP32 firmware that pairs the AirTap directly with Apple Home over Wi-Fi. That’s native Apple support without Home Assistant, without a Home Assistant HomeKit Bridge, and without a separate server translating ESPHome entities into HomeKit accessories.

This post is not a finished firmware release. It is a technical roadmap for developers, makers, and advanced AirTap owners who want to understand what it would take to build one. It’s enough architecture to start the project, enough code structure to see the direction, and enough caution to avoid the obvious traps.

Homespan on SCL Blog

Native Apple Home Firmware for the AC Infinity AirTap ESP32 Upgrade Kit with HomeSpan and PlatformIO