WanderShade — Family Architecture Spec (v1.0-candidate)
Product family: WanderShade — smart roller-shade motor with Matter + Thread, optional solar trickle. Replaces SwitchBot Curtain + IKEA Fyrtur in a single quiet, identity-aware motor head. Revision: v1.0-candidate Date: 2026-04-25 SOP: v2.4
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1. Why this exists
Smart shade motors are the most-installed consumer-electronics window-covering category and the one with the worst reliability record. SwitchBot Curtain + IKEA Fyrtur dominate the under-$100 segment with a category that wakes the household at 6 AM with whining gear noise, dies on battery within 9 months without sun, and broadcasts its raise/lower schedule to a vendor cloud. Lutron Serena and Hunter Douglas PowerView address the high end with $400–$900 motorized shades that require a hub, a bridge, and a recurring app subscription to do what a wall switch does.
The category needs a third option: a motor head that is quiet at night, runs on local Matter + Thread without a vendor cloud, sips power from a small solar panel for the half of homes that get any direct light, and respects identity-aware operation for survivors who do not want their schedule logged.
WanderShade is the WanderVerse smart shade motor. It is DC-motor + optical encoder + Matter-over-Thread, with a Pro tier that adds Maxeon C60 5 W solar + LiFePO4 cell (reused from WanderAway Ultra) and a heavier-duty 50 lb shade load capability. Both tiers ship with covert privacy mode (close-all on duress tap), no schedule telemetry leaving the device, and panic-close instant.
The product thesis is concrete: a shade motor a survivor of stalker-pattern monitoring can install without their schedule leaving the home, that the no-touch-cloud LGBTQ+ household can run on a 5 W panel facing south, and that Ambassador-assembles into the matte-anodized motor housing with a saffron pull-cord nub.
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2. Product family overview
| Tier | Device ID | Form factor | Hero feature | Retail | Ship target |
|---|
| **WanderShade Lite** | `WV-SHADE-LITE` | 38 mm motor head + roller adapter | Battery-only DC motor, 30 lb shade load, Matter + Thread, Honeywell HOA0901 optical encoder, ESP32-S3 host, identity-aware covert mode | **$129** | 2027-Q2 |
| **WanderShade Solar** | `WV-SHADE-SOLAR` | Same head + 5 W solar trickle + LiFePO4 cell | Lite + Maxeon C60 5 W solar + TI BQ25798 MPPT charger + LiFePO4 18650 cell + 50 lb shade load capability + tropical / high-cycle duty | **$199** | 2027-Q3 |
Hero image alignment
The hero render shows a 38 mm-diameter cylindrical motor head with matte anodized charcoal aluminum housing, with:
- Saffron pull-cord nub at the bottom of the housing — single tactile tug = open-toggle; double tug = covert mode; long pull (3 s) = pair / panic-close
- Recessed status LED (Cree CLM3C-AKA saffron) on the underside of the head, visible only when looking up at the shade
- Saffron pinstripe at the seam between motor head and roller adapter (family-wide visual standard; matches WanderAlert + Security Trio + WanderCO + WanderDash)
- Roller adapter ring (interchangeable for 1.25", 1.5", 1.75", 2.0" roller diameters)
- Solar tier adds a 75 × 75 mm Maxeon C60 panel on a small swivel-mount that clips to the window casing 50–200 mm above the shade (visually disappears against the frame)
Visual identity preserved across the family: matte anodized charcoal aluminum motor head (matches WanderDash mounting bracket + Security Trio bezel charcoal accents), saffron pull-cord nub + saffron status LED + saffron pinstripe (family-wide), roller adapter polymer cream (matches WanderCO chassis cream).
The motor head is identical between Lite and Solar — Solar adds the panel + LiFePO4 cell + MPPT charger on the interior PCBA, with the only exterior delta being the small charging-input port on the head's top face and the panel itself. This is intentional: ambassadors should be able to upgrade Lite → Solar via a board-swap send-back without the household removing the shade.
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3. The four hard problems this category fails at
3.1 Quiet at night
SwitchBot Curtain is rated at ~45 dB at 1 m during operation — louder than ambient bedroom at 22:00–06:00. IKEA Fyrtur is similar. Lutron Serena is the only consumer device in the category with quiet operation, at $400+. Quiet is a design decision, not a price decision. WanderShade uses:
- Brushed DC motor with TI DRV8235 driver — current-controlled, sinusoidal-PWM commutation (~20 kHz; above human hearing) → eliminates the audible-hum present in low-cost square-wave-PWM shade motors
- 3:1 helical-cut gearbox (vs straight-cut spur in SwitchBot) — helical teeth mesh continuously → eliminates the tooth-engagement chirp characteristic of straight-cut at typical shade speeds (3–5 RPM at the roller)
- Honeywell HOA0901-051 optical encoder for closed-loop position control → motor ramps up/down (no abrupt start/stop that creates mechanical click)
- Vibration-isolated motor mount — silicone bushings between motor body and aluminum housing absorb axial vibration
Spec target: ≤30 dBA at 1 m during operation (target ambient bedroom @ 22:00). Verified at EVT in anechoic chamber.
3.2 Solar trickle that actually works
Most "solar shade motors" ship a 1 W panel that requires direct south-facing sun for 4 hours a day to net-positive. WanderShade Solar uses a Maxeon C60 5 W cell (reused from WanderAway Ultra) + TI BQ25798 MPPT charger (reused) + LiFePO4 18650 cell (reused) — solar-input architecture rated at ≥40% efficiency in indirect / partial-shade conditions.
Energy budget (Solar tier):
- LiFePO4 18650: 1500 mAh @ 3.2 V = 4.8 Wh
- Per-cycle energy (50 lb shade × 2 m travel × 2 raise+lower per day): ~0.4 Wh (motor + control overhead)
- Daily draw: ~0.8–1.2 Wh (2–3 cycles + Thread mesh standby + Matter advertising)
- Solar input at 5 W panel × 4 h indirect light × 40% efficiency = 8 Wh/day delivered
- Net: solar input exceeds daily draw at 4 hours of useful (indirect-OK) light → cell stays topped year-round in any room with at least one window getting indirect daylight
Lite tier: battery-only LiFePO4 18650 (smaller-capacity 1200 mAh = 3.84 Wh) + 5W USB-C charging port + recharge-every-3-months at typical 2-cycle/day usage. Customer plugs in to a USB-C charger when companion app says "battery at 20% — please charge."
3.3 Local-first, no schedule telemetry
The default smart-shade-motor cloud architecture sends every raise/lower event + every schedule entry to a vendor cloud (SwitchBot, IKEA, Lutron). This is an identity-vulnerable design pattern:
- Stalker-pattern attacker with credential access to vendor cloud knows when victim is home, asleep, awake, in bedroom vs living room
- Insurance-carrier attacker infers occupancy + behavioral patterns
- Workplace-monitoring attacker infers remote-work patterns (CSCO 2024 data: 14% of employers admitted to monitoring "smart home signals" of remote workers via OSINT)
WanderShade ships Matter-over-Thread local-first — no schedule telemetry leaves the device. The Thread credential network handles all routing through the household's Thread border router (typically a HomePod, Apple TV 4K, Google Nest Hub Max, Amazon Echo 4th gen, or WanderNode Hub). The schedule lives on the WanderShade itself + on the Matter controller (e.g., Apple Home, which synchronizes to iCloud Keychain end-to-end-encrypted, never to a SwitchBot/IKEA cloud).
If the user opts into WanderNode Hub (WanderVerse-native), the schedule lives on the Hub locally — never to WWP cloud unless the user explicitly opts into anonymous telemetry. Default state: zero data leaves the home.
3.4 Identity-aware operation (panic-close, covert mode)
Per Standard 0 (survivor / identity-aware modes):
- Panic-close instant: triple-tug on saffron pull-cord nub → all WanderShade units in the household close immediately (mesh broadcast via Thread) within 1.5 s. Use case: stalker walks past house at unexpected hour; survivor wants visual privacy NOW. No companion-app required, no pairing, no delay. Hardware-tactile-only path.
- Covert mode (silent operation, no LED): double-tug → motor operates in silent mode (saffron LED off; no companion-app push; schedule still runs but does not echo to any external endpoint). Use case: survivor lives in shared housing where housemate has companion-app access; survivor wants privacy from housemate's phone notifications.
- Duress code on companion app: user-defined gesture (e.g., "open then immediately close" via app) triggers identity-aware response: all shades close + companion-app sends panic notification to pre-configured trust contact + LED goes dark. Use case: under-coercion scenario (someone watching the user use the app forces normal-looking action that is actually a panic signal).
Default state: all identity-aware features available; user opts in via companion app or pull-cord gesture. No identity-aware feature requires a subscription. Compare: Lutron Serena's "vacation mode" requires Lutron Connect Bridge ($150) + Lutron app + cloud account.
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4. Architecture
4.1 Family platform (shared across both tiers)
| Block | Part | Notes |
|---|
| Host MCU | ESP32-S3-WROOM-1-N16R8 | 16 MB flash + 8 MB PSRAM; reused from Security Trio + WanderAlert + WanderCO |
| Thread/Matter radio | TI CC2652R7 | Thread 1.3 + Matter 1.3; reused from WanderAway Family |
| Optical encoder | Honeywell HOA0901-051 | NEW for parts library — distinguishing WanderShade part; quadrature output |
| Motor driver | TI DRV8235 | NEW for parts library; brushed-DC; 3.5 A continuous; current-sense + stall detect |
| Motor | DC brushed 12 V 100 RPM | NEW for parts library; 3:1 helical gearbox; vibration-isolated |
| Status LED | Cree CLM3C-AKA saffron | reused from Security Trio + WanderAlert + WanderCO |
| LED driver | TI TPS92518 | reused (single-channel for saffron status only) |
| PMIC | TI TPS65086100 | reused from WanderAlert + WanderCO |
| Pull-cord switch | Custom magnetic-Hall + saffron-anodized polymer nub | NEW form factor; reuses Allegro A1324 Hall sensor |
| Secure element | NXP SE051 | reused; identity-aware role token + Thread credential storage |
| Flash NOR | Macronix MX25R 16 MB (via WROOM module) | integrated |
4.2 WanderShade Solar — additions
| Block | Part | Notes |
|---|
| Solar cell | Maxeon C60 5 W (75 × 75 mm) | reused from WanderAway Ultra |
| MPPT charger | TI BQ25798 | reused from WanderAway Ultra |
| LiFePO4 cell | EVE LF18650 1500 mAh | reused from WanderAway Ultra |
| Cell holder | Keystone 1042-2 | reused from WanderCO |
| Charging-input port | USB-C 5 V (factory + emergency-recharge) | reused (GCT USB4125) |
| Cable from panel to head | 1.8 m flat-profile twisted pair (28 AWG; matte gray UV-resistant TPU jacket) | NEW |
| Panel swivel mount | Custom CNC anodized aluminum + 3M VHB tape kit | NEW |
4.3 WanderShade Lite — additions
| Block | Part | Notes |
|---|
| Battery cell | EVE LF18650 1200 mAh | smaller-capacity LiFePO4 (cost saving vs Solar) |
| Charging-input port | USB-C 5 V | for periodic recharge |
4.4 What WanderShade does NOT have
- No display. State communicated via saffron status LED + companion app + pull-cord tactile feedback.
- No microphone. Categorically out of scope; privacy hard rule.
- No camera. Same.
- No cellular radio. Local-first by design; Thread mesh + WiFi (via host) is the only path.
- No vendor cloud requirement. Matter local-first; no SwitchBot/IKEA-class cloud account.
- No subscription requirement for any feature.
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5. Identity-aware operation (D-SHADE-007)
Per Standard 0:
5.1 Panic-close instant (hardware path)
- Trigger: triple-tug on saffron pull-cord nub (within 2 seconds; debounce-window enforced)
- Action: local WanderShade closes immediately; broadcasts panic-close mesh message via Thread (multicast group
0xFFFD, WanderShade group ID); all paired WanderShade units in household close within 1.5 s
- No companion app required. No pairing required (unit ships pre-paired to its mesh group via SE051 role token; new unit added to household via Matter pairing inherits the panic-close group).
- Audit log: event written to local SE051-stored ring buffer (last 64 events); never transmitted off-device unless user explicitly exports via companion app.
5.2 Covert mode (silent operation)
- Trigger: double-tug on saffron pull-cord (within 1 second)
- Action: WanderShade enters covert mode — saffron LED off; companion-app status hidden (UI shows "covert"); scheduled events still execute but do not push notifications to paired phones; no Thread "shade-state-changed" advertising beyond what's required for Matter binding integrity
- Exit: double-tug again to return to normal mode; or via companion app
5.3 Duress code (companion app gesture)
- Default: off
- User-configurable gesture: e.g., "open shade fully, then immediately close to 50%" via companion app
- When triggered: all paired WanderShade units close; companion app sends panic notification to pre-configured trust contact (SMS via Twilio / iMessage / Signal — user choice; ZERO going to WWP); LED goes dark; Thread radio enters silent listen-only mode (still receives Matter commands but does not respond — visual indistinguishability from "shade is offline")
- Exit: trust-contact-confirmed reset via companion app + WanderNode Hub admin
5.4 Schedule telemetry policy
- Default: schedules live on WanderShade + Matter controller; never to vendor cloud
- Apple Home users: schedule synchronizes to iCloud Keychain end-to-end encrypted (Apple does not see it)
- Google Home users: schedule lives in Google Home Graph (Google encrypts at-rest; user can review + export + delete)
- WanderNode Hub users: schedule on Hub locally; never to WWP cloud
- NO SwitchBot / IKEA / Lutron cloud option. WanderShade does not support these cloud architectures.
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6. Coverage architecture (Matter + Thread integration)
| Capability | WanderShade Lite | WanderShade Solar |
|---|
| Matter Window Covering cluster (open/close/level/tilt) | green | green |
| Thread border router participation | green (router-eligible) | green (router-eligible) |
| Apple Home pairing | green | green |
| Google Home pairing | green | green |
| Amazon Alexa pairing | green | green |
| Samsung SmartThings pairing | green | green |
| Home Assistant pairing | green via Matter | green via Matter |
| WanderNode Hub native | green | green |
| Local-first schedule | green | green |
| Cloud-required for any core feature | **NO** | **NO** |
Coverage gate: WanderShade is a complete Matter Window Covering device in standalone mode — pairs with any Thread border router + Matter controller from day one, requires no WanderVerse-specific hub. Solar tier adds energy-harvesting independence; Lite tier requires periodic USB-C recharge. Both tiers are full Matter 1.3 + Thread 1.3 compliant.
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7. Quiet operation engineering (D-SHADE-002)
Per category-failure analysis in §3.1, quiet operation is the dominant differentiator vs SwitchBot / IKEA Fyrtur:
7.1 Drive-stage acoustics
- DC motor commutation: TI DRV8235 brushed-DC driver at 20 kHz PWM (above 16 kHz human hearing threshold); sinusoidal current-shaping (ICA mode) eliminates sub-harmonic audible buzz
- Brush-pair commutation noise: brushed DC has inherent commutation noise ~50 dBA at brush-pair frequency; mitigation: motor body fully encapsulated in steel can with foam acoustic-isolating sleeve; verified at EVT
- Encoder bandwidth: Honeywell HOA0901 quadrature signal sampled at 1 kHz; ramp-up/ramp-down profile (1.5 s acceleration + 1.5 s deceleration) eliminates start/stop click
7.2 Gearbox acoustics
- Helical-cut gears (3:1): continuous tooth engagement (vs straight-cut tooth-by-tooth contact) reduces gear chirp by 8–12 dB at the typical 3–5 RPM output speed
- Gearbox housing: sintered-bronze bushings (vs plastic) at higher-load bearing points; oil-impregnated; eliminates resonance squeak across gear life
- Gear-oil: lithium-grease lubrication; rated -10 to +85 °C operating; 10-year service life
7.3 Mechanical isolation
- Motor-to-housing: 4 × silicone Shore 50A bushings between motor mounting flange and aluminum housing — absorb axial vibration; prevent housing-resonance amplification
- Roller-adapter coupling: spring-tensioned 6 mm hex drive into roller bore — eliminates rattle at start/stop; tolerates ±0.5 mm roller eccentricity
- Housing material: 6063-T5 aluminum + Type II anodize (charcoal) — aluminum chassis dampens audible-band resonance better than ABS plastic (industry default)
7.4 Verification spec
- Acoustic chamber: anechoic chamber rental at NTS or Element Materials Technology
- Mic spec: B&K 4189 free-field 1/2" mic at 1 m distance, 90° from motor axis
- Pass criteria: ≤30 dBA at 1 m, A-weighted, sustained-operation steady-state
- Stretch: ≤25 dBA (matches Lutron Serena spec)
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8. Compliance summary (per `COMPLIANCE.md`)
| Cert | Status | Notes |
|---|
| **FCC Part 15 Subpart B** (digital electronics Class B) | green | residential consumer |
| **FCC Part 15 Subpart C** (intentional radiator — Thread 2.4 GHz + WiFi via host) | green | passthrough via TI CC2652R7 + ESP32-S3 modular cert |
| **Matter 1.3 certification** (CSA Connectivity Standards Alliance) | red blocker | cert + interop testing; ~$15-25k |
| **Thread 1.3 certification** (Thread Group) | red blocker | bundled with Matter cert; ~$8-12k |
| **IEC 60335-1** (household appliance safety — applies to motorized window-covering) | red blocker | motor safety + finger-pinch hazard + thermal safety; ~$8-12k |
| **UL / ANSI 325 (operators — door, gate, drapery, shutter, awning, window covering)** | yellow | applies to motorized window covering >25 lb shade load; bundled with IEC 60335-1 |
| **CSA C22.2 No. 0** general electrical safety | green | bundled |
| **CE / UKCA** + EN 60335-1 + EN 55032 + EN 55035 + EN 300 328 | green | bundled |
| **Bluetooth SIG** (BLE commissioning for Matter) | green | included in Matter cert |
| **IP41** (drip-resistant; window-track install can see condensation) | green | enclosure design accommodates |
| **RoHS / REACH** | green | declared |
| **UN 38.3 / IEC 62133 / UL 1642** (LiFePO4 cell shipping + safety) | inherited | from EVE cell-family |
| **Cordless / Pull-cord safety (CPSC + ANSI/WCMA A100.1)** | green | NO continuous looped cord — hardware tug/release only |
Total cert v1: ~$45-65k. Matter + Thread cert dominates the cert burden; IEC 60335-1 is the additional life-safety lift that distinguishes this from a pure-electronics product.
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9. Manufacturing + service summary
Ambassador assembly (Standard 1)
- Tier-2 for both WanderShade SKUs (motor pre-test + encoder calibration + acoustic verify per-unit)
- Per-unit Ambassador time:
- Lite: ~12 min/unit (~32 units / 8-hr day)
- Solar: ~16 min/unit (~28 units; +4 min for solar subassembly + LiFePO4 cell QC)
- Ambassador signature: laser-engraved aluminum tag on motor head interior service panel; paired to unit serial in WanderOS
Per-unit production tests
- 16 tests per unit (see
DFM-DFA-DFT.md)
- Includes acoustic verification (B&K mic in QC anechoic mini-chamber; ≤32 dBA pass — production margin to 30 dBA spec)
- Encoder phase + step verify (1024-CPR quadrature)
- Motor stall-current measurement (DRV8235 current-sense calibration)
- LiFePO4 cell impedance + voltage QC
- Solar-tier: panel Voc + Isc measurement at 1 sun-equivalent LED panel
7-year-parts compliance (Standard 4)
- Motor (DC brushed 12 V) — Ambassador-replaceable as full motor-gearbox assembly kit; stocked through year 7
- Honeywell HOA0901 encoder — sub-board replaceable; stocked through year 7
- LiFePO4 cell — stocked through year 7 (EVE LF18650; alternate Samsung INR18650-15M qualified at DVT)
- Maxeon C60 panel — stocked through year 7 (alternate Sunpower 5W qualified)
- Year 8: STL + schematic + firmware-source release CC BY-SA 4.0 (STLs) / CC BY-NC-SA 4.0 (firmware)
Service plan (per `SERVICE-FLOW.md`)
- 2-year standard warranty + extended warranty options
- DIY: roller adapter swap (1.25" / 1.5" / 1.75" / 2.0"), USB-C recharge, panel re-clip
- Ambassador send-back: motor-gearbox swap, encoder calibration, LiFePO4 cell swap, solar panel replacement
- Factory: housing re-finish, mainboard swap, full re-cert if substantial repair
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10. Revenue + social-impact integration
60/30/10 Community Pool flow (Standard 5)
Per canonical revenue split:
- 60% → Ambassador wages (1099 → W-2 at revenue trigger)
- 10% → PrideFund (Ambassador HYSA)
- 30% → WWP Community Pool (Layer 1 ops ≤65%; Layer 2 Ambassador-voted ≥35%)
Donor-sponsored kits (HAVEN safehouse + Title-I housing)
- Donor channel for DV-safehouse + Title-I-equivalent rural-housing sponsorship
- Match: WWP grant-matches up to 1:1 from Community Pool
- Eligibility: 501(c)(3) DV shelters + LGBTQ-housing nonprofits + Native youth housing + Tribal-enrolled rural housing programs
- WanderShade-specific: privacy-vulnerable households (DV survivors, transitional-housing residents) benefit disproportionately from local-first schedule architecture
Grant-fundable
- HUD Healthy Homes (privacy-aware home automation maps to safety + dignity criteria)
- VAWA housing transition pools (DV-safehouse upgrade + privacy-respecting smart home)
- DOE residential energy efficiency (Solar tier — solar-trickle smart shade reduces HVAC load by ~3-7% via automated schedule)
- HUD HOPWA (LGBTQ-housing privacy upgrade)
Margin gate
Per task brief: margins must hit 50%+ at 5k volume.
- WanderShade Lite BOM at 5k volume: ~$58 (see
BOM-platform.csv); retail $129; margin ~55% ✅
- WanderShade Solar BOM at 5k volume: ~$96; retail $199; margin ~52% ✅
Both tiers pass margin gate. See BOM-normalized.csv for full cost-rollup.
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11. Feature inventory (Stage 0 sweep)
Hardware features
- Matter 1.3 + Thread 1.3 native (no hub required for any core feature)
- ESP32-S3 host + TI CC2652R7 Thread radio (architecture matches WanderAway Family)
- Honeywell HOA0901-051 optical encoder for closed-loop position control
- TI DRV8235 brushed-DC motor driver (current-sense + stall-detect)
- 3:1 helical-cut gearbox + sintered-bronze bushings (acoustic optimization)
- Maxeon C60 5 W solar (Solar tier) + TI BQ25798 MPPT charger + LiFePO4 18650 cell
- LiFePO4 18650 (1500 mAh Solar / 1200 mAh Lite)
- USB-C charging port (factory + emergency recharge)
- Saffron pull-cord nub with Hall-sensor input (single/double/triple-tug + long-pull)
- Saffron status LED (Cree CLM3C-AKA)
- Matte-anodized charcoal aluminum motor housing 38 mm dia
- Roller adapter ring (1.25" / 1.5" / 1.75" / 2.0" interchangeable)
- IP41 drip-resistant
- 7-year parts (Standard 4)
- Ambassador-assembled (Standard 1)
- CC BY-SA 4.0 STLs (roller adapters, panel-mount swivel)
Software features
- WanderOS-Shade on Zephyr (deep-sleep optimized — Lite tier needs to hit 3-month USB-C recharge interval at 2 cycles/day)
- Matter Window Covering cluster (open/close/level/tilt full implementation)
- Thread 1.3 mesh participation (router-eligible)
- TI DRV8235 driver + Honeywell HOA0901 encoder closed-loop position control
- Saffron status LED state machine
- Pull-cord gesture parser (single/double/triple-tug + long-pull + duress code)
- Identity-aware: panic-close instant + covert mode + duress code (D-SHADE-007)
- Schedule storage (local SE051; never to vendor cloud)
- BLE companion app pairing for setup + advanced config
- WanderNode Hub admin web UI (fleet management; trust contacts; alert policy)
- Secure-element role token enforcement (NXP SE051)
- OTA via Thread mesh fragment / WiFi (when household has WiFi paired) / BLE
- WanderOS service history per unit
Operational features
- Household single-unit + multi-unit deployment
- Donor-sponsored DV-safehouse / LGBTQ-housing kits via WWP Community Pool match
- HUD Healthy Homes + VAWA + DOE energy efficiency grant deployment pipeline
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12. Risk register
| # | Risk | Severity | Mitigation |
|---|
| 1 | Matter + Thread cert delays beyond 2027-Q1 | red | CSA enrollment 2026-Q3; reference unit ready EVT |
| 2 | IEC 60335-1 motor safety cert delays | red | Pre-cert pre-scan in-house 2026-Q4; UL/Intertek booking 2027-Q1 |
| 3 | Acoustic spec ≤30 dBA missed at EVT | red | Helical gearbox + silicone isolation + DRV8235 sinusoidal current-shaping all targeting -8 to -12 dB margin |
| 4 | Honeywell HOA0901 supply (single-source-class) | yellow | Alternate: Broadcom HEDS-9100 + Avago AEDR-8500 qualified at DVT |
| 5 | TI DRV8235 supply | yellow | Alternate: TI DRV8870 + Allegro A5957 qualified at DVT |
| 6 | DC brushed motor brush-life shorter than 7-year parts standard | yellow | Brush-life rated 10,000 cycles @ 50 lb load = ~13.7 years at 2 cycles/day; Ambassador motor-swap kit covers edge cases |
| 7 | Stall-detect false-positive in heavy shade fabric | yellow | DRV8235 current-sense calibration per fabric profile; user-configurable load profile in companion app |
| 8 | Solar tier panel mount damages window casing | yellow | 3M VHB tape-only mount; spec rated for residential casing; explicit removability instructions |
| 9 | Pull-cord Hall-sensor false-trigger from external magnet (kid's magnet near window) | yellow | Dual-Hall differential design (A1324 × 2 with 4 mm separation) — common-mode external field rejection |
| 10 | Engineering hire timeline slips | red | Shared engineering pool with WanderAlert + WanderAway + WanderCO; pipeline started 2026-Q3 |
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13. Conflict register
Resolved per DECISIONS.md D-SHADE-001 through D-SHADE-010. Key conflicts:
- D-SHADE-001: DC brushed motor vs BLDC — RECONCILED in favor of brushed (cost + simplicity + acceptable life at 2 cycles/day)
- D-SHADE-002: Quiet operation engineering as hard spec (≤30 dBA) — DOCUMENTED; binding on EVT pass
- D-SHADE-007: Identity-aware features (panic-close + covert + duress) — DEFAULT-AVAILABLE; no subscription required
- D-SHADE-008: Solar tier as separate SKU vs option-on-Lite — REVIEWED; ship as separate SKU for cleaner BOM + sourcing + cert
- D-SHADE-010: Matter Window Covering cluster as primary integration; SwitchBot/IKEA cloud NOT supported
No software conflicts with existing WanderVerse specs.
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14. Marketing language gate
Words we DO use:
- "Quiet smart shade motor — 30 dBA at 1 m"
- "Matter + Thread native — works with Apple Home, Google Home, Amazon Alexa, SmartThings"
- "Local-first schedule — no vendor cloud"
- "Solar trickle keeps it topped year-round in any window with daylight"
- "Identity-aware operation: panic-close, covert mode, no schedule telemetry"
- "Replaces SwitchBot Curtain and IKEA Fyrtur in a single quiet motor"
Words we do NOT use:
- "Smart home revolution" — overused; banned per style guide
- "comprehensive shade controller" — banned per style guide
- "proven motor design" — banned per style guide
- "significant privacy" — banned per style guide
- "Next-gen Matter integration" — banned per style guide
- "Seamless Apple Home integration" — banned per style guide; use "works directly with Apple Home"
- "Replaces your existing shade" — we ARE a shade motor; we don't position as a supplement
- "Smarter than Lutron Serena" — comparative claims need substantiation; invite reverse claims
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15. Ship discipline
- v1.0 launch: 2027-Q2 Lite → 2027-Q3 Solar — both gated by Matter + Thread + IEC 60335-1 cert
- v1.1 (3 months post-ship): UX polish; companion app feature depth; first survivor-user-feedback integration; tilt support for Roman / cellular shades
- v1.2 (6 months post-ship): dual-roller (curtain + sheer combo); blackout-fabric automatic-light-sense pairing
- v2 (2028–2029, conditional): BLDC motor option for >50 lb commercial shade loads; integrated PoE+ option for hard-wired commercial install
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16. Ambassador + Community Pool integration
(verbatim from _TEMPLATES/_community-pool.md + _ambassador-signature.md + _seven-year-parts.md):
How the money flows
Every sale of a WanderShade SKU is divided three ways:
- 60% pays the Ambassador who assembled the unit
- 10% seeds PrideFund — community-held HYSA accruing for Ambassador-voted initiatives
- 30% funds the WWP Community Pool — the 501(c)(3) nonprofit. Subject to 65/35 charter rule
Ambassador signature mark
Every WanderShade unit carries a laser-engraved aluminum tag inside the motor-head service panel:
- Ambassador ID (pseudo-random alphanumeric)
- Assembly date
- Unit serial number
- Acoustic-pass dBA reading
- Motor + cell lot reference
At refurbishment (motor-swap or cell-refresh), a second signature is added beneath the first. Provenance accumulates.
Seven-year parts
Every spare part for WanderShade is available for 7 years from ship date, via Ambassador network, at cost + 10%. Year 8: every manufacturing file is published.
What "parts" includes:
- Mechanical assemblies (motor head housing, motor-gearbox subassembly, encoder sub-board, roller adapter rings, panel swivel mount)
- All sub-boards + modules (mainboard, Thread radio, motor driver, MPPT charger Solar)
- LiFePO4 cells (EVE LF18650 1200 / 1500 mAh)
- Solar panel (Maxeon C60 5 W; Sunpower alternate)
What "parts" does NOT include:
- Standard fasteners (M3 / M4 screws — sourceable from any aftermarket)
- Window-casing 3M VHB tape (industry-standard adhesive)
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This spec is the source of truth for the WanderShade family. Companion docs (DECISIONS.md, BOM-platform.csv, BOM-modules.csv, BOM-normalized.csv, CONFIGURATOR.md, COMPATIBILITY.md, SOURCING.csv, DFM-DFA-DFT.md, THERMAL-EMC.md, COMPLIANCE.md, GUIDE.md, HW-FW.md, SERVICE-FLOW.md, GATE.md, STL-OPEN-FILES/README.md, _VALIDATION-AND-SENSOR-EXPANSION.md, _COMPETITIVE-AUDIT-2026-04-25.md, _MANIFEST.md) elaborate; this spec governs.