#Projects

A test that sends mail needs somewhere for the message to land. fakeemaildomain.com is that place: a public mail exchanger that accepts the envelope, replies on purpose, and discards the body. The site has no signup, no inbox, and no forwarding.

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My JBL EON 515XT would not power on. The relay did not click, and the speaker barely drew any power from the wall. After a relay swap, voltage checks and a round of component testing, I tracked the fault to the LNK302DN power supply IC at U608. Replacing that chip brought the speaker back to life.

The useful part of this repair was how we isolated it. A low resistance reading around a capacitor initially gave us several possible suspects. Removing components and checking the same points again showed exactly where that low resistance was coming from.

If you have a JBL EON 515XT that will not turn on, these are the symptoms, measurements and checks from my repair. They describe this particular board and fault, so check your own component markings and board revision before ordering parts.

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For years the AC Infinity AirTap has been a popular register booster with a frustrating smart-home story: closed apps, Bluetooth-only workflows, and a control board that was never meant for local automations. We already solved that for earlier generations with drop-in ESPHome boards see the Gen2 install guide and shop module if you have that hardware. Then a newer AirTap showed up with something that almost made me celebrate out loud: an ESP32-C6-WROOM-1. [Read More]

Owners of the AC Infinity AirTap T4/T6 with a Gen2 vent can replace the factory control board with our ESP32 module to add local smart home control through ESPHome and Home Assistant. The Gen2 housing keeps the original button bracket in place. The kit includes a small display cover bracket made for the Gen2 layout. This guide walks through what is in the kit, how that cover bracket fits, and the exact steps to install the PCB. [Read More]

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.

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Owners of the AC Infinity AirTap T4/T6 may be looking for a way to retrofit their older Gen2 ESP32 module so it can operate inside the newer Gen3 AirTap vent. The Gen3 design uses a different mounting layout and sensor position, which means the original Gen2 hardware does not fit or function without modification. To solve this, we created a simple upgrade path that lets you reuse your Gen2 module with full Gen3 compatibility. [Read More]

Working alongside One Buffalo Labs, we’re excited to formalize a partnership that ensures SiloCityLabs’ projects have a clean, fast, and accessible home online.

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If you’ve ever struggled to keep track of your 3D filament spools, wondering how much filament is left or dealing with a failed print due to an empty spool, FilaMeter is the filament tracking solution you’ve been looking for. Managing your 3D printing filament inventory no longer has to involve guesswork.

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At SiloCityLabs, we’re always working to improve our products, and 2025 has brought a number of exciting updates to our ESP32 Module for AC Infinity Airtap T4/T6! With new features and design enhancements, this latest version offers better smart home integration, improved usability, and customization options.

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Are you looking to take your Filament Dryer to the next level? The Filament Dryer PCB is the ultimate upgrade, adding enhanced filament material support, a better display, and smart home integration to ensure your 3D printing workflow is seamless and efficient.

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