Innerscene

SkySync™

& Mini Hub

User Manual

SkySync is the first sensor capable of capturing the true color of a blue sky and bringing it indoors. Mounted to your window, it streams real-time color and brightness data to your Circadian Sky or Virtual Sun fixture.

The included Mini Hub extends SkySync's range across your building via your local network, ensuring every fixture stays synchronized with the sky outside.

Compatible with	Circadian Sky • Virtual Sun
Firmware req.	v2.0.61 or later
Warranty	5 years

In This Manual

Quick Start ............... p.2

Mount, Aim & Home Screen ..... p.2

Pair, Mini Hub & Firmware .... p.3

Schedule + SkySync Activation .. p.4

Complete Guide

SkySync Settings ............... p.5

Mini Hub Deep-Dive ............. p.7

Multi-Fixture & Communication . p.8

Troubleshooting ................ p.9

Specifications ................. p.10

Quick Start Guide

What's in the Box

1	SkySync sensor (battery pre-installed)
2	Innerscene Mini Hub
3	USB-C cable & wall adapter (for Mini Hub)
4	Mounting tape (Gorilla Tough & Clear)
5	Quick Start card (this document)

Before You Begin

You need a Circadian Sky or Virtual Sun fixture with firmware v2.0.61+
Choose a window with a clear view of the sky
Avoid frosted or heavily patterned glass
Best results: set up on a clear sky day
Update fixture firmware to unlock higher CCTs (see Firmware Update, p.3)

Step 1 — Mount SkySync to a Window

1

Clean the window glass where you'll mount the sensor.

2

Peel the adhesive backing off the flat back of the SkySync base.

3

Press firmly onto the inside of the window.

4

Press the button on the side of SkySync. A red LED flash confirms the sensor is active and transmitting.

5

Tilt the swivel head upward to aim the sensor toward the open sky.

Indoor Mounting Tips

Fit the included hood over the top of SkySync to block reflected room light. If CCT reads low on a clear day, angle more steeply upward.

SkySync mounts to glass with built-in adhesive. The swivel head tilts to aim at the sky. The hood blocks reflected room light.

Step 2 — Aim the Sensor

1

Press the button on SkySync. The red LED flashes to confirm it is active.

2

Connect to your fixture and monitor the CCT reading on the home screen.

3

Tilt the SkySync head to achieve the highest possible CCT. On a clear day, target 200,000K+.

Understanding the Home Screen

Once paired, the home screen shows a SkySync status row with live data:

#	Element	Description
1	Ring indicator	Countdown to next sensor update
2	Live readings	Sky CCT, ambient CCT, and lux
3	Signal bars	Bluetooth signal strength
4	Battery	Battery % (replace CR2477 below 10%)
5	Gear icon	Quick access to SkySync settings

Home screen SkySync status row

Step 3 — Pair SkySync to Your Fixture

1

Connect to your fixture via WiFi or the Innerscene Studio app.

2

The home screen shows "SkySync Found" with a Pair button.

3

Tap "SkySync Found" to open the SkySync page.

4

Tap the detected sensor, then confirm "Pair".

5

The home screen now shows live SkySync data: sky CCT, ambient CCT, and lux.

Connecting to your fixture

On your phone, join WiFi network Innerscene-...
Default password: innerscene
Open 172.30.0.1 in your browser
Or use the Innerscene Studio app

"SkySync Found" appears when a sensor is nearby

Step 4 — Set Up Mini Hub

The Mini Hub extends SkySync range from 30ft direct to 100ft+ over your network.

1

Power: Connect the included USB-C cable to the Mini Hub, or use Power over Ethernet (PoE).

2

Network: Plug an Ethernet cable into your router (recommended). Or connect via WiFi (see p.6).

3

Done: Mini Hub automatically detects SkySync via Bluetooth and relays data in two ways:

Wireless Relay (No Network Required)

Mini Hub rebroadcasts SkySync at higher power (+21 dBm) plus Innerscene Wireless mesh — no router needed. Place within 20ft of SkySync and within 50ft of fixtures.

Network Relay (For Longer Distances)

For fixtures beyond 50ft, connect Mini Hub to your local network (Ethernet or WiFi). Data relayed via AES-encrypted UDP broadcast (port 65003). Fixtures also rebroadcast via mesh.

Innerscene Mini Hub — compact gateway with Ethernet, WiFi, and BLE

Firmware Update (If Needed)

If your fixture firmware is older than v2.0.61, update before pairing. Updating also unlocks higher CCT support.

1

Download Innerscene Studio from the iOS App Store.

2

Connect to your fixture via WiFi (Innerscene-..., password: innerscene).

3

Go to Settings → Advanced → Firmware Updates, select the file, and tap Update.

4

Wait ~60s. The fixture flashes its lights when complete. Do not disconnect power during update.

Activating Schedule + SkySync Mode

Schedule + SkySync mode combines your programmed schedule with real-time sky tracking. There are three ways to activate it:

Method 1: Set Power-On Default to “Use Schedule”

Settings → Power-On Default → Use Schedule. Fixture automatically starts in Schedule + SkySync mode on power-up. Recommended for permanent installations.

Method 2: Enable Idle Resume

Settings → Idle Resume → choose a timeout (15 min, 30 min, or 1 hr). After inactivity, the fixture automatically returns to Schedule + SkySync mode.

Method 3: Tap the Schedule Card

On the Home screen, tap the Schedule + SkySync card to activate immediately.

Set Power-On Default to “Use Schedule”

Enable Idle Resume for automatic return

Tap the Schedule + SkySync card on Home

External Controls Deactivate Schedule Mode

External controls (0-10V, DALI, DMX, Casambi) will exit Schedule mode. To resume, wait for Idle Resume or tap the Schedule card again.

SkySync Settings

Access SkySync settings from Home → SkySync row (gear icon) or Settings → SkySync → SkySync Settings.

1 Live Preview Strip

Shows real-time sensor reading and current fixture output at the top of the settings page.

2 What SkySync Controls

Option	Description
Color & Brightness Default	SkySync drives both CCT and brightness — fixture fully follows the sky
Color Only	SkySync sets CCT only; brightness stays at schedule/manual level
Brightness Only	SkySync sets brightness only; CCT follows the schedule

3 Sensor Selection

SkySync has two sensor windows:

Sensor	FOV	Best For
Sky (Narrow) Default	10°	Capturing blue sky color directly
Ambient (Wide)	180°	Overall room-level light including reflections
Average Both	—	Blended reading of both sensors

The narrow sky sensor (black cylinder) captures the true color of the sky. The wide ambient sensor (white diffuser) measures surrounding light.

4 Response Speed

Speed	Transition Time	Effect
Fast	~3 seconds	Fixture closely tracks rapid sky changes (clouds passing)
Normal Default	~10 seconds	Smooth, natural transitions
Slow	~45 seconds	Very gradual changes; barely noticeable to occupants

Sensor Adjustments

Trim what the sensor sees before it drives the fixture.

Brightness Boost

Adjusts fixture brightness relative to sensor readings.

Dimmer

← — slider — →

Brighter

Default: center (match sensor). Useful for compensating for tinted windows that reduce perceived brightness.

CCT Boost

Shifts the color temperature warmer or cooler relative to sensor readings.

Warmer

← — slider — →

Cooler

Default: center (match sensor). Useful for fine-tuning color appearance to your preference.

SkySync Settings — primary controls

1 Operating Hours

Define when SkySync is active. Outside these hours, the fixture reverts to its schedule.

Setting	Default	Description
Time mode	Clock	Clock: fixed times. Sunrise: relative to sunrise/sunset.
Start time	6:15 AM	SkySync begins controlling the fixture
End time	7:15 PM	SkySync stops; fixture follows schedule

Status Messages

"Outside operating hours" — current time is outside your set window
"Low light" — ambient light too low (dawn/dusk/night)
"Sensor offline" — no data received for 10+ minutes
"SkySync paused" — fixture is in manual mode

3 Brightness Limits

Set a floor and ceiling on fixture brightness. Min/Max Lux slider defines the range.

When Too Dark: Dim to minimum, Follow schedule, or Use fixed warm light (e.g., 2700K).

4 CCT Limits

Min/Max CCT slider constrains the fixture's color temperature range (e.g., min 3000K prevents very warm light at sunset).

Operating hours slider

Brightness limits, CCT limits, and tint correction

Innerscene Mini Hub

The Mini Hub is a compact gateway that receives SkySync data via Bluetooth and relays it to your fixtures over the local network.

When You Need the Mini Hub

Range Extension

Fixtures are beyond SkySync's direct 30ft BLE range. Mini Hub rebroadcasts at higher power for up to 50ft reach.

Multi-Room

Multiple rooms need sky data — use the network relay for building-wide coverage

No Config Needed

Wireless relay works with power only. Network relay uses UDP broadcast (no DHCP required).

Power Options

Method	What You Need	Best For
USB-C	Included cable & wall adapter	Quick setup, flexible placement
Power over Ethernet (PoE)	PoE switch or injector (IEEE 802.3af)	Clean single-cable install — power + data in one

Power consumption: 0.5W. Any standard USB-C phone charger works.

Network Connection

Option A: Ethernet (Recommended)

Plug an Ethernet cable from your router/switch into the Mini Hub
That's it — fixtures on the same network receive SkySync data via UDP broadcast

No DHCP Required

Mini Hub uses UDP broadcast which works without DHCP or IP configuration. Ethernet provides the most reliable connection. If using PoE, you get power + network in a single cable.

Option B: WiFi

Power on the Mini Hub (USB-C, no Ethernet)
On your phone, join: Innerscene-hub-XXXX
Password: innerscene
Open 172.30.0.1 in your browser
Go to WiFi settings → Connect to WiFi
Select your network, enter password, tap Join

Note

If your WiFi network name or password changes, you'll need to reconnect to the Mini Hub's AP and reconfigure.

LED Indicators

LED	State	Meaning
Power	Solid on	Hub is powered and running
Ethernet	Blinking	Active network traffic (data relay in progress)
Ethernet	Off	No Ethernet cable connected (using WiFi or not connected)

Mounting & Placement

Mount using a single screw through the hole in the enclosure
Place within 20ft of SkySync for reliable BLE reception
Place within 50ft of fixtures for wireless relay, or connect to your network for longer distances
Ideal location: near a window with SkySync, close to a network drop

Mesh Rebroadcast

All Circadian Sky and Virtual Sun fixtures relay SkySync data via Innerscene Wireless mesh and UDP broadcast. Each relay hop decrements a TTL counter (default: 2 hops) with sequence deduplication to prevent loops. The primary fixture doesn't need to be closest to every secondary — the mesh extends coverage automatically.

Multi-Fixture Setup

SkySync communication architecture — direct wireless, local network, and cloud relay

Primary & Secondary Fixtures

Innerscene fixtures use a wireless group system where one Primary fixture coordinates with Secondary fixtures.

Role	SkySync Behavior
Primary	Pairs with SkySync directly. Receives and distributes sky data.
Secondary	Receives SkySync data automatically via mesh. No setup needed — pre-provisioned by Innerscene.

Key Points

Only the Primary fixture needs to pair with SkySync
Multiple Primaries (e.g., in different rooms) can all pair to the same SkySync sensor
Secondaries receive SkySync data through the mesh — no action required
All fixtures relay SkySync data via Innerscene Wireless mesh (TTL-based, up to 2 hops by default) and UDP broadcast if on WiFi
Fixtures also relay Mini Hub broadcasts, extending coverage further

Wireless Group Details

For full details on setting up wireless groups, see the Circadian Sky User Guide.

Communication Modes

1. Direct Wireless

Range: ~30ft

SkySync → Fixture via BLE. No network or hub needed. Best for single-room setups within range.

2. Mini Hub Wireless Relay

Range: 20ft + 50ft

SkySync → Mini Hub → Fixtures via higher-power BLE rebroadcast. No network needed — just power. For fixtures beyond 50ft, add network relay.

3. Network Relay (UDP)

Range: Unlimited (LAN)

SkySync → Mini Hub → LAN → Fixtures via AES-encrypted UDP broadcast (port 65003). Best for multi-room, large buildings. Cloud relay coming soon.

Troubleshooting

Symptom	Possible Cause	Solution
"SkySync Found" doesn't appear on home screen	Sensor out of range, not transmitting, or paired to another fixture	Press the SkySync button to trigger transmission. Move within 30ft. Check battery level.
Weak signal (1–2 bars)	Distance or walls between SkySync and fixture	Move SkySync closer to the fixture, reduce obstructions, or use the Mini Hub for network relay instead of direct wireless.
CCT reads low on a clear day (<10,000K)	Interior light reflections or poor sensor aiming	Ensure the hood is fitted to block room light. Re-aim the sensor more steeply toward the sky. Test with room lights off. Reposition to reduce glass reflections from interior surfaces.
"Outside operating hours — using schedule"	Current time is outside your SkySync active window	Normal behavior. Adjust the operating hours slider in SkySync Settings if needed.
"Low light — using schedule"	Sensor lux below minimum threshold (dawn/dusk/night)	Normal behavior. Adjust brightness limits or "When too dark" action in Settings.
"Sensor offline — using schedule"	No SkySync data received for 10+ minutes	Press the SkySync button. Check battery (<10% = replace CR2477). Verify sensor is within range or Mini Hub is active.
Mini Hub not relaying data	Network misconfiguration	Verify Ethernet LED blinks. Confirm fixtures are on the same WiFi network/subnet as the hub. Restart the hub by removing and reapplying power.
Fixture not responding to SkySync	SkySync disabled, wrong mode, or old firmware	Check SkySync toggle is enabled. Verify firmware ≥ v2.0.61. Ensure control mode is set to "Automated (Schedule + SkySync)".
Colors look wrong compared to actual sky	Sensor aiming or interior reflections	Ensure the hood is fitted. Re-aim the sensor more steeply upward. Test with room lights off. Use the CCT Boost slider in SkySync Settings to fine-tune color.

Battery Replacement

SkySync uses a standard CR2477 coin cell battery with 10+ year life. The battery level is shown on the home screen and SkySync page.

Replace when the indicator shows below 10%
Battery readings can be affected by temperature; accuracy is ±5%
To access the battery, remove the front cover
CR2477 batteries are widely available online and at electronics retailers

USB-C Hard Power

SkySync includes a sealed USB-C port for installations requiring continuous power beyond the 10-year battery life. Remove the sealing tape and connect a USB-C cable for permanent operation. When USB-C is connected, the battery is bypassed.

Factory Reset & Shipping Mode

Action	How	Effect
Factory Reset	Press and hold the button for 5 seconds until LED confirms	Resets polling interval, TX power, and calibration to factory defaults. Does not unpair.
Shipping Mode	Tap the button 5 times within 5 seconds	Enters ultra-low-power standby (<1µA). Press the button to wake. Used for long-term storage.
Reboot	Press and hold for 10 seconds	Forces a cold restart of the sensor.

SkySync Sensor Specifications

Sensors
Sky Sensor	10° narrow FOV (black cylinder with lens)
Ambient Sensor	180° wide FOV (white round diffuser)
Color Accuracy	1 SDCM
CCT Range	2,200K – 1,000,000K
Lux Range	0 – 100,000+ lux

SkySync senses up to 1,000,000K. Fixture output depends on model/firmware — up to 200,000K with latest firmware.

Communication
Protocol	Bluetooth Low Energy (BLE)
Frequency	2.4 GHz ISM band
Direct Range	30ft to fixture
With Mini Hub (BLE)	20ft sensor → hub, 50ft hub → fixture
With Mini Hub (Network)	Unlimited (via UDP broadcast on LAN)
Update Interval	15 seconds (default, configurable 5–3600s)

Power
Battery	CR2477 coin cell (pre-installed)
Battery Life	10+ years
USB-C	Sealed port for hard-power installations
Operating Hours	Dawn to dusk (auto night suspend)

Physical
Dimensions	1.2″ × 4″ (32mm × 104mm)
Mounting	Built-in adhesive on swivel cylinder base
Swivel	Up/down tilt for sky aiming
IP Rating	IP20 (indoor use)
Outdoor	Waterproof enclosure available separately

Compatibility
Fixtures	Circadian Sky, Virtual Sun
Min. Firmware	v2.0.61
App	Innerscene Studio (iOS; Android coming soon)

Safety & Warranty
Battery Safety	UL 1642 Listed
Warranty	5 years

SkySync sensor — compact form factor

Innerscene Mini Hub Specifications

Connectivity
SkySync Reception	BLE, 20ft range from SkySync
BLE TX Power	+21 dBm (ESP32-S3 built-in antenna)
Wireless Relay	Innerscene Wireless proprietary mesh (no router needed) + BLE rebroadcast
Network Output	UDP broadcast (port 65003, AES encrypted)
Ethernet	10/100 Mbps
WiFi	2.4 GHz, WPA2-PSK, via web UI
Cloud Mode	TCP to Innerscene Cloud (SSL, outbound only) — coming soon

Physical & Electrical
Power	PoE (IEEE 802.3af) or USB-C (5V)
Consumption	0.5W
Enclosure	78mm × 27mm × 20mm
Antenna	Built-in (internal PCB antenna)
Mounting	Single screw to any surface
Operating Temp	0°C to 40°C (32°F to 104°F)
LEDs	Power (solid) & Ethernet (activity)
Warranty	5 years

Further Resources

Circadian Sky User Guide	innerscene.com/products/circadian-sky/user-guide
CS Installation Manual	innerscene.com/products/circadian-sky/installation-manual
VS Installation Manual	innerscene.com/products/virtual-sun/installation-manual
iOS App	Search "Innerscene Studio" on the App Store
Support	[email protected]