How to Automate Your Home Theater Setup

My wife calls it "the six-remote problem." Turn on the TV. Switch the receiver to HDMI 2. Open the streaming app. Dim the living room lights. Close the blinds because of the glare. Adjust the surround sound profile. By the time everything is set, the mood to watch something has passed. Sound familiar?

Home theater automation collapses all of that into one action. One button press. One voice command. One NFC tag tap. Everything in the room configures itself for movie time. Here is how to set it up with hardware you probably already have.

What You Can Actually Automate

Let me set expectations. There are things that automate beautifully and things that are too frustrating to bother with:

Works Great

• Turning TV on/off and switching inputs
• Receiver/soundbar power and input selection
• Room lighting (dimming, color shift, full off)
• Blinds/shades (close for movie, open after)
• Starting a specific app on smart TVs
• Sound profile switching on receivers

Not Worth Automating

• Browsing content and selecting what to watch (too dynamic, no reliable API)
• Subtitle selection (changes per show)
• Volume fine-tuning (everyone's preference differs)

Method 1: Home Assistant + IR Blaster (Best for Most People)

If you already run Home Assistant, this is the most flexible approach. You need an IR blaster to control devices that use infrared remotes (TVs, receivers, projectors). The Broadlink RM4 Mini ($25) is the go-to choice. It learns IR codes from your existing remotes and lets HA send them on demand.

Setup Steps

1. Add the Broadlink integration: HA auto-discovers Broadlink devices on your network. Add it under Settings, Devices.
2. Learn remote codes: Point each remote at the Broadlink and press the buttons you want to automate. HA stores the IR codes as entities. Learn at minimum: power on/off, input selection, and volume for your TV and receiver.
3. Create a "Movie Night" script or scene: Chain all the commands together with appropriate delays between them. IR devices need 500ms-1s between commands to process each one.
4. Add a trigger: A dashboard button, an NFC tag, a physical Zigbee button, or a voice command.

For smart TVs that have LAN/WiFi control (most LG, Samsung, Sony, and Android TV models), HA can control them directly without an IR blaster. The TV integration lets you turn the TV on via Wake-on-LAN and switch inputs through the network API, faster and more reliable than IR.

Method 2: Harmony Hub (If You Already Have One)

Logitech Harmony hubs are discontinued but still work and are available used for $30-50. The Harmony system was designed specifically for this problem: multi-device activity switching. A "Watch Movie" activity turns on the right devices, sets the right inputs, and powers off everything that is not needed.

HA integrates with Harmony hubs, so you can trigger Harmony activities from HA automations and layer in lighting and blind control on top.

Method 3: HDMI-CEC (Free, Built In)

HDMI-CEC is a protocol built into HDMI that lets devices control each other. When you turn on your Apple TV, CEC can automatically turn on the TV and switch to the correct input. When you turn off the TV, CEC can put the streaming device to sleep.

CEC is free and requires no extra hardware. The catch is that CEC implementation varies wildly between manufacturers (Samsung calls it Anynet+, LG calls it SimpLink, Sony calls it Bravia Sync). Some combinations work perfectly, others are frustratingly unreliable.

The Lighting Component

Theater lighting is where smart home automation really shines (pun intended). Here is the setup that works for us:

• Movie start: Overhead lights dim to 5% warm white (2200K) over 5 seconds, then off after 30 seconds. Bias lighting behind the TV (an LED strip at 10% brightness in a warm tone) stays on, it reduces eye strain and makes the picture look better.
• Pause: Lights come up to 30%. We trigger this through the TV's media state in HA, when the media player entity goes to "paused," lights respond.
• Movie end: Lights gradually return to normal over 10 seconds. Blinds open if it is still daylight. TV stays on in case you want to pick something else.

If you have smart blinds, closing them when movie mode activates is a game-changer for daytime viewing.

My Complete Movie Night Automation

Here is what happens when I tap the "Movie Night" NFC tag on our coffee table:

1. Living room blinds close (3 seconds).
2. TV powers on via Wake-on-LAN (2 second wait for boot).
3. Receiver powers on and switches to HDMI ARC input via IR (1 second delay).
4. TV switches to the Apple TV input via HA integration.
5. Overhead lights dim to 0% over 5 seconds.
6. LED bias light behind TV sets to 8% at 2700K.
7. Hallway light dims to 20% so you can get to the bathroom without tripping.

Total time from tap to ready: about 8 seconds. Way better than the 2-minute six-remote dance.