Home Assistant AC Automation with IR Blaster and Presence Sensors
Air conditioner automation is one of the most practical Home Assistant upgrades because it connects comfort, energy saving, and room presence. The key is not only sending an IR command. The better setup knows whether someone is still in the room before it changes the AC state.
This guide explains how to combine a local IR blaster, mmWave presence sensors, and LinknLink gateways so Home Assistant can control AC, fans, TVs, and room scenes without depending on cloud routines.
Why AC Automation Needs More Than a Remote
A simple smart remote can turn an air conditioner on or off. A stronger Home Assistant setup uses context: time of day, room presence, sleep mode, guest mode, and whether the room is actually vacant. This is where IR control and presence sensing work together.
For LinknLink users, the routing is straightforward: use eRemote HA when you need a dedicated local IR remote hub, use eMotion Pro when presence and IR room control should live in the same device, and use iSG Box SE or iSG Display Max as the Home Assistant control base.
Local IR control
Send AC, fan, and TV commands from Home Assistant without relying on a cloud remote app.
Presence-aware comfort
Use mmWave presence to keep comfort scenes active only while the room is occupied.
Cleaner room logic
Build room modes such as work, guest, sleep, away, and energy saving instead of one-off remote commands.
Product Routing for Home Assistant AC Control
| Need | Best LinknLink product | Why it fits | Internal link |
|---|---|---|---|
| Dedicated AC / TV / fan IR hub | eRemote HA | Local IR control through Home Assistant MQTT for infrared appliances. | Best IR blasters for Home Assistant |
| Presence plus IR in one room | eMotion Pro | mmWave presence plus built-in IR control for AC, TV, and scene automation. | Room automation blueprint |
| Flexible presence placement | eMotion Air | Battery powered presence placement for desks, beds, and temporary room tests. | Battery powered presence guide |
| High precision permanent presence | eMotion Ultra | 60GHz presence detection for fixed rooms that need stronger occupancy logic. | 60GHz placement guide |
| Home Assistant gateway | iSG Box SE or iSG Display Max | Coordinates local automations, dashboards, scenes, and device integrations. | Local control smart home guide |
Automation Pattern: Presence-Aware AC
The safest AC automation starts with a rule that only changes comfort states when presence is confirmed. It should also use delay windows so the AC does not toggle when someone leaves briefly or walks past the room.
Home Assistant AC automation pattern:
if room_presence is on for 2 minutes:
set AC to comfort mode based on time of day
if room_presence is off for 10-20 minutes:
set AC to eco mode or turn off
if sleep_mode is active:
use a slower temperature change
avoid bright scene changes
if guest_mode is active:
expose simple AC controls only
keep private routines hidden
Four Practical Room Setups
Bedroom sleep comfort
Use presence and sleep mode to avoid turning the AC off too soon. Link to the Home Assistant sleep mode automation guide when the room needs night logic.
Office working mode
Use a presence sensor near the desk and an IR hub for AC or fan control. Keep the room active while someone is typing or reading.
Living room media mode
Combine presence, TV, fan, and AC commands so one room scene can handle comfort and media together.
Guest room mode
Use simple controls and conservative automations. Connect with the guest mode automation guide for privacy-friendly room access.
Checklist Before You Publish the Automation
- Confirm the AC remote code works locally before adding presence rules.
- Place the presence sensor where people stay, not where the outlet is.
- Use a vacancy delay so the AC does not turn off during short exits.
- Add manual override buttons in Home Assistant for comfort and safety.
- Link the article to eRemote HA, eMotion Pro, iSG Box SE, and existing IR / room automation guides.
Internal link path: connect this guide with Best IR blasters for Home Assistant, Home Assistant room automation blueprint, Local control smart home guide, and energy saving automations with presence and IR control.
FAQ
Can Home Assistant control an air conditioner with an IR blaster?
Yes. If the air conditioner uses an infrared remote, Home Assistant can control it through a compatible IR blaster or local IR hub such as eRemote HA.
Why combine presence sensors with AC automation?
Presence sensing helps Home Assistant avoid cooling or heating an empty room. It can keep comfort scenes active while someone is still present and reduce AC usage after the room is vacant.
Which LinknLink products fit AC automation?
Use eRemote HA for local IR control, eMotion Pro when presence sensing and built-in IR control should work together, and iSG Box SE or iSG Display Max as the Home Assistant gateway.
Is local IR control better than a cloud AC remote?
Local IR control is usually faster and more private because the automation can run through Home Assistant without waiting on a vendor cloud service.
Build a Room That Knows When to Stay Comfortable
Start with local IR control, add room presence, then connect the full automation through Home Assistant.