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The original was posted on /r/homeassistant by /u/Squeeech on 2026-06-05 12:22:38+00:00.
Wall Mount for Guition ESP32-S3 4848S040 – A smart home panel for your entrance that even the cat sitter can use
Hey everyone! Long-time lurker, first-time poster here – wanted to share a little project that started with a very specific frustration: every time someone else needs access to our flat – the cat sitter, a family member, an Airbnb guest – I'd end up writing a two-page instruction manual for the smart home. Not ideal.
The solution I landed on is a wall-mounted panel right at the entrance, combining a touch display with a hidden NFC reader. Hand someone a card, they tap it on the way in, and the right things just happen – lights turn on, the heating adjusts, whatever scene you've set up in Home Assistant. No app, no login, no explanation needed.
The hardware side of things
The enclosure is a custom-designed PLA print that fits the Guition ESP32-S3 4848S040 touch display and hides everything behind the wall plate. The bottom compartment houses a Mean Well IRM-05-5 AC/DC power supply – mains voltage in, clean 5V/1A out. No power brick, no USB cable creeping down the wall. The display connects via a 4-pin MX1.25 connector (PIN1 = GND, PIN4 = +5V), and the ATOM Lite for the NFC reader gets its power from a second 4-pin socket in the same compartment.
The NFC reader sits behind the top panel, completely invisible from the outside but close enough to scan reliably. It's based on the excellent "No Soldering DIY NFC TagReader" project – if you haven't seen it, definitely worth a look. The idea is simple: you hand out pre-programmed NFC cards to whoever needs them. The cat sitter gets a "cat sitter card" that triggers exactly the automations she needs – nothing more, nothing less. No fumbling with apps, no accidentally turning off the heating.
Software
The display runs ESPControl (an ESPHome-based project by jtenniswood) paired with Home Assistant. Fully local, no cloud dependency, and fast enough that it actually feels responsive to the touch. The NFC side is handled entirely within Home Assistant automations – each card has its own tag ID and triggers whatever scene you've assigned to it.
Assembly
The enclosure prints in PLA and goes together with 4× M3 heat-set inserts and 4× M3×8 hex screws. Solid wall mount, no glue, no friction-fit guesswork.
Files are available on Makerworld: https://makerworld.com/de/models/2892428-combined-display-mount-for-the-guition-4-display#profileId-3231998
Happy to answer questions in the comments – and curious whether anyone else has gone down the "NFC for guests" rabbit hole!
Quick safety note: this build involves mains voltage (230V AC). If you're not comfortable working with line voltage, please have a qualified electrician handle the wiring.
