Starter Loadout — a $300 openhome build

You bring a Raspberry Pi to run the hub. This is the shopping list for everything it

controls: the radios that turn the Pi into a protocol hub, a set of ESPHome lights,

and two rooms of synced Snapcast audio. Everything here is chosen to plug straight

into what the app already drives — /setup → /lights → /speakers.

Prices are ballparks (street price / our build guide) — verify at

checkout. Links are starting points, not endorsements.

What you're building

                 ┌─────────────── your Pi (the hub) ───────────────┐
 ESPHome bulbs ──┤  openhome hub  +  snapserver  +  librespot        ├── Spotify / library
 (Wi-Fi, local)  │  Matter/Thread via USB stick                      │
                 └───────┬───────────────────────────────┬──────────┘
                         │ Snapcast (synced)             │ Snapcast (synced)
                   Living Room                       Bedroom
                 Pi Zero 2 W + amp                Pi Zero 2 W + amp
                 + powered speaker                + powered speaker

• Lights → ESPHome bulbs, discovered and controlled locally by the hub. Zero cloud.
• Climate → an ESPHome thermostat wired to your HVAC; setpoint/mode logic runs on-device.
• Speakers → Wi-Fi rooms run a snapclient each, time-aligned by the hub's calibration

and grouped for sample-synced multi-room playback; Bluetooth speakers onboard for casual

rooms with auto-reconnect.

• Radios → a Zigbee/Thread stick future-proofs you for Matter-over-Thread and the

cheap Zigbee catalog.

Your build — bill of materials

Matthew's config: 5 color bulbs (incl. warm orange), hub add-ons, an ESPHome

thermostat, and a 2 Wi-Fi + 2 Bluetooth speaker mix. Links are Amazon search

pages — pick the current best price/rating. A couple of items are cheaper bought direct;

noted inline. Prices are ballparks — verify at checkout.

🧠 Hub add-ons (Pi already owned) — ~$45

If your Pi already has power + SD, skip items 2–3 (−$18).

🟠 Lights — 5× RGBCW (full color + warm orange) — ~$70

RGBCW = full RGB color + tunable white, so you get every color and a warm orange

glow (~2200 K white, or an RGB amber). Buy direct from Athom and pick "ESPHome" at

checkout — Amazon's cheap "smart bulbs" are cloud Tuya, not our local backend. They

appear in the Lights wizard under ESPHome → Find on my network.

🌡️ Thermostat — ESPHome, wired to your HVAC — ~$37

Runs ESPHome's on-device climate controller — setpoint, mode and hysteresis live

on the thermostat, so heating/cooling keeps working even if the hub reboots. Shows up

in the Climate tab under ESPHome. Prefer no wiring? A Matter-over-Thread thermostat

pairs via the ZBDongle-E (item 1) — the bring-your-own path.

Minimal ESPHome climate config:

```yaml

climate:

- platform: thermostat

name: "HVAC"

sensor: room_temp

default_target_temperature_low: 20 °C

heat_action: { switch.turn_on: relay_heat }

cool_action: { switch.turn_on: relay_cool }

idle_action: { switch.turn_off: relay_heat }

```

🔊 Speakers — 2 Wi-Fi (synced) + 2 Bluetooth — ~$166

Wi-Fi — 2 synced rooms (Snapcast):

Bluetooth — 2 speakers:

The Wi-Fi pair plays in sample-sync (calibrate + ⇄ Sync). Bluetooth speakers onboard

with auto-reconnect but aren't part of the synced group. Prefer zero assembly for Wi-Fi?

Swap each Pi-Zero kit for a plug-and-play AirPlay speaker (~$40) — the app still sees

it over the network, you just lose sample-sync.

Total ≈ $318 — 5 color lights + hub radios + ESPHome thermostat + 2 Wi-Fi & 2 Bluetooth speakers.

Lean version ≈ $220 — skip PSU/SD (−$18), 1 Wi-Fi room (−$55), 1 Bluetooth (−$28).

Two honest calls

• Multi-room audio is DIY here. A snapclient per room (Pi Zero + amp) is ~$40/room and

is exactly what our Snapcast layer targets. Off-the-shelf synced speakers (Sonos) are

$150+ each and would eat the whole budget on one room. If you want v1 dead-simple,

swap items 7–11 for one good Bluetooth/AirPlay powered speaker (~$60) — you lose sync

but everything else works, and you can add snapclients later.

• Go all-ESPHome for the first lights. It's our own-firmware path, so onboarding is

instant and fully local. Add a Matter/Thread bulb later once the ZBDongle-E is in.

Turnkey: the two-room synced audio

Hub side (once) — snapserver + librespot

Follow Run on your Pi to install snapserver + librespot on the hub.

In short, librespot writes to a FIFO that snapserver streams:

sudo apt install -y snapserver
# /etc/snapserver.conf
[stream]
source = pipe:///tmp/snapfifo?name=openhome&sampleformat=48000:16:2&codec=flac

The hub talks to snapserver's control port on 127.0.0.1:1705 (override with

SNAPCAST_HOST/SNAPCAST_PORT). Once it's up, /speakers shows 🔗 sync active.

Client side — flash each Pi Zero 2 W

Repeat for each room (name them per room, e.g. living-room, bedroom):

1. Flash Raspberry Pi OS Lite (64-bit) with Raspberry Pi Imager. In the gear/⚙️

settings: set hostname to the room (living-room), enable SSH, and enter your

Wi-Fi. Boot it.

1. Install snapclient:

```bash

ssh pi@living-room.local

sudo apt update && sudo apt install -y snapclient

```

1. Wire the audio out.

• MAX98357A (I2S): add to /boot/firmware/config.txt:

```

dtparam=audio=off

dtoverlay=max98357a

```

then sudo reboot. Speaker to the amp's screw terminals.

• USB DAC: just plug it in (no config needed).

1. Point the client at the hub — edit /etc/default/snapclient:

```

SNAPCLIENT_OPTS="-h <HUB_IP> --hostID living-room --player alsa"

```

Use the same name you'll give the speaker in the app so calibration/sync map to the

right client.

1. Start it on boot:

```bash

sudo systemctl enable --now snapclient

```

Finish in the app

1. Open /speakers — each Pi Zero appears as a live speaker.
2. Assign each to its room (Living Room, Bedroom).
3. Tap ✨ Calibrate per room → set distances → the hub pushes per-client delay + trim

to snapclient.

1. Tap ⇄ Sync to group a room → both endpoints play the same audio, sample-synced.

That's the whole chain: discover → onboard → room → calibrate (spatial) → sync, running

on ~$265 of hardware plus the Pi you already own.