serin labsHow to Control Your Mini-Split with Apple HomeKit in 2026
Walk through the Home app's "Add Accessory" list and you'll find thermostats, air purifiers, even humidifiers. What you won't find is a mini-split. Not one ductless brand sells a HomeKit-ready heat pump in 2026, and the manufacturer apps (Kumo Cloud, MELCloud, and the rest) don't bridge into Apple Home either.
You can still get there. I have every mini-split in my house showing up as a native thermostat tile in Apple Home, with Siri, scenes, and automations, and none of it touches a cloud. This post is the how: which brands can do it, what hardware it takes, and the actual setup, step by step.
Quick Facts
- No mini-split brand ships with HomeKit in 2026; there's no official accessory to pair
- The best route is a small ESP32 controller on the indoor unit's CN105 serial port, flashed with free, open-source HomeKit-compatible firmware
- Brands it covers: Mitsubishi Electric, plus Trane and American Standard ductless units (rebadged Mitsubishi)
- Cost: ~$15–20 in DIY parts, or a pre-assembled controller from $35; one per indoor unit
- Setup time: about 20 minutes per unit; the firmware flash itself takes around two minutes
- Remote access and automations need an Apple Home Hub (Apple TV or HomePod)
- Cloud / account / subscription: none
Can You Add a Mini-Split to Apple HomeKit?
Yes, but not the way you add a HomeKit thermostat. Nothing in the box supports it: not the IR remote, not the manufacturer's Wi-Fi adapter, not the app. Searching "mini split HomeKit" mostly turns up people asking why not.
The reason is that mini-splits were designed around a handheld infrared remote, and IR is a one-way street. The remote shouts commands; the unit never answers. That's also why most aftermarket "smart AC controllers" you'll see (Sensibo, Cielo, and similar) are IR blasters: easy to build, but blind. They can't confirm the unit heard them, and they can't read what the unit is actually doing.
Some units have a better door in. Mitsubishi indoor units carry a serial port on the control board, the CN105 connector, and it's two-way: full command set plus live feedback, including room temperature, operating mode, and error codes. Put a small Wi-Fi board on that port, flash it with HomeKit-compatible firmware, and the mini-split pairs into Apple Home like any certified thermostat. That's the route this guide sets up.
Which Mini-Split Brands Work with HomeKit?
The CN105 route is a Mitsubishi thing, but Mitsubishi's reach is wider than the badge suggests.
| Brand | HomeKit route | How |
|---|---|---|
| Mitsubishi Electric | CN105 controller | Direct serial control, this guide |
| Trane / American Standard ductless | CN105 controller | Rebadged Mitsubishi units, same port |
| Daikin, Fujitsu, LG, Gree, Midea... | IR bridge only | A HomeKit IR controller such as the Sensibo Air |
Most Mitsubishi Electric wall units, floor units, and ducted air handlers from roughly the last 15 years have the port. The quick proxy: if your unit can run Kumo Cloud or MELCloud, it almost certainly has CN105. Take five minutes and check your exact model before buying anything.
If your mini-split is another brand entirely, the serial route is off the table and an IR bridge is the honest answer. The Sensibo Air is the one with real HomeKit certification, and for a non-Mitsubishi unit it's what I'd buy, with the usual IR caveats: no feedback from the unit, and it can drift out of sync with the handheld remote. I've written up where IR controllers fall short if you want the details.
The rest of this post assumes you're in the first two rows.
What You Need
Three things, and you may already own the third.
- An ESP32 board and a CN105 cable. An M5Stack NanoC6 or Atom S3 Lite plus a CN105-to-Grove cable, one per indoor unit. About $15–20 if you buy the parts yourself, or pre-assembled from $35.
- The firmware. Free and open source; you flash it from a browser in about two minutes. Nothing to compile, no app to install.
- An Apple Home Hub, for the full experience. An Apple TV or HomePod. You can control the unit on your home Wi-Fi without one, but the Hub is what enables remote access and lets automations run when your phone isn't home.
No hub hardware beyond that, no wiring, no electrician. The CN105 port powers the board, so there's no power brick either.
How to Set Up Mini-Split HomeKit Control, Step by Step
Start to finish this is about 20 minutes for the first unit, faster for each one after.
1. Flash the firmware. Plug the board into your computer over USB and flash it from your browser. It uses Web Serial, so Chrome or Edge handles the whole thing; pick the HomeKit-compatible build. The flash itself runs about two minutes.
2. Plug the board into CN105. Power the unit down, pop the indoor unit's front cover, find the CN105 header on the control board, and plug in the cable. It only fits one way. Tuck the board somewhere with a little airflow and close the cover. The wiring guide has photos for the common unit types.
3. Join it to your Wi-Fi. On first boot the board broadcasts its own hotspot. Join it from your phone (the setup guide has a QR code that connects you) and a portal opens to take your home network credentials.
4. Pair with Apple Home. Open the Home app, tap Add Accessory, and scan the pairing QR code from the setup page. One thing to expect: this firmware isn't MFi-certified, so the Home app shows an "Uncertified Accessory" notice and asks you to tap Add Anyway. That's a one-time tap, not a recurring nag.
5. Name it and place it in a room. The mini-split lands in Apple Home as a thermostat. Give it the room's name and Siri picks it up immediately.
That's the whole install. No account was created anywhere in those five steps, which is the part that still pleases me most.
What Can You Do with a Mini-Split in HomeKit?
Once paired, it behaves like any Apple Home thermostat, which is the whole point.
Siri, right away. "Hey Siri, set the bedroom to 70." "Hey Siri, turn off the office AC." Pairing is all the setup Siri needs.
Scenes. Drop the heat pump into "Good Night" alongside the lights: one tap cools the bedroom and dims everything. A "Leaving Home" scene that eases every zone back a few degrees is the single laziest energy win in the house.
Automations. Warm the house before your alarm. Set back when the last person leaves, resume when the first one returns. Nudge the living room at sunset. These run on the Home Hub, so they keep working with your phone in your pocket or across the country.
A tile on every Apple screen. iPhone, iPad, Mac, Apple Watch, CarPlay through Siri. Because the firmware speaks HomeKit's own protocol, there's no companion app and no login. The mini-split just sits next to your lights and locks.
Room-height temperature, if you add a $15 sensor. The firmware can regulate off a cheap BLE thermometer (Govee, Xiaomi, SwitchBot, and anything speaking BTHome v2) placed at couch height instead of the unit's own sensor up at the ceiling. It's optional, and it's the change that made the biggest comfort difference in my house. More in the room sensor post.
Do You Need a HomePod or Apple TV?
For part of it, yes. On your home Wi-Fi, your phone talks to the controller directly and no hub is involved. Two things require an Apple Home Hub (any Apple TV 4K, HomePod, or HomePod mini):
- Remote access. Checking or changing the temperature from outside the house.
- Automations. Schedules and triggers that run when your phone isn't home.
Most Apple households already have one under the TV or on a shelf. If you don't, a HomePod mini is the cheapest ticket. There's no fee and no configuration; the Home app uses whichever hub it finds.
Frequently Asked Questions
Does this need Mitsubishi's Kumo Cloud adapter? No. The controller replaces it. If you already bought one, the CN105 controller uses the same port, so it's one or the other on a given unit.
Will the handheld remote still work? Yes. The IR remote keeps working alongside the controller, and the controller sees the changes it makes, so Apple Home stays in sync. That's the two-way serial link earning its keep.
Does it work with multi-zone systems? Yes, with one controller per indoor unit. Each head becomes its own independent thermostat in the Home app, which is what a multi-zone system is for.
Is there a subscription? No. No account, no cloud, no monthly anything. Control stays on your Wi-Fi even if your internet is down.
What about Home Assistant or Google Home instead? Same board, different firmware. The ESPHome build covers Home Assistant and, through it, Google Home and Alexa. You can reflash between builds from the browser whenever you change your mind.
What if my unit doesn't have a CN105 port? Then this route is out, and I've written up your remaining options honestly. For non-Mitsubishi brands, the Sensibo Air is the HomeKit-certified IR fallback.
The Honest Limits
- It's Mitsubishi-family only. Daikin, Fujitsu, LG, and the rest don't have this port. An IR bridge is their ceiling.
- The "Add Anyway" prompt. The firmware isn't in Apple's MFi program, so pairing shows an uncertified-accessory notice once. It changes nothing afterward.
- The controller owns the CN105 port. You generally can't run it alongside a wired Mitsubishi wall controller on the same unit. The IR remote is unaffected.
- You flash the firmware yourself. It's a browser page and about two minutes, but it's still a step. Boards don't ship with it installed.
Who Should Do This
- You're a Mitsubishi (or Trane/American Standard ductless) owner living in Apple Home. This is your path. Native tile, Siri, automations, no cloud, about $35 per unit and 20 minutes each.
- You own another brand. Get a Sensibo Air and accept the IR trade-offs, or read the controller comparison before deciding.
- You run Home Assistant as your hub. Consider ESPHome firmware on the same board and exposing it to Apple Home through HA's bridge, so HA stays your single source of truth. The Mitsubishi Apple Home deep-dive compares all three routes.
The short version:
- Confirm your unit has a CN105 port.
- Get the board and cable, one per indoor unit, or a pre-assembled controller.
- Flash the firmware, plug it in, and pair with the setup guide.
In 2026, "does my mini-split work with HomeKit" still has no official answer. The unofficial one takes 20 minutes and never asks you to log in.