Two intelligent mats. Complete awareness of everything at your front door — arrivals, deliveries, weather alerts, and theft detection in real time.
Smart home systems detect arrival 200 metres away. Motion sensors cannot tell people from cats. Nobody knows when parcels arrive, how long they sit outside, or when they disappear.
From footstep to notification in under two seconds. No Wi-Fi at the door. No installation. Just place it and it works.
64-point sensor grid reads pressure signature every 500ms
ESP32-S3 distinguishes footstep, parcel, cat, wind — no cloud needed
Event relayed via Bluetooth 5.0. HomeKit triggers locally in milliseconds
Server checks carrier tracking, weather, calendar context in background
“Ella arrived home at 3:42pm.” No alarm. Just awareness.
Every component engineered for purpose — from the natural coir surface to the sensor puck inside the weatherproof base tray.
Top to bottom: premium natural coir → pressure sensor grid → protective foam → weatherproof base tray → smart sensor puck with optional piezo energy harvesting tiles. Everything hidden. Just a mat.
The Package Mat’s four-point load cell array reads weight to ±50g. The moment a parcel lands, Dory cross-references your active tracking numbers and names the order — before the driver is back in his van.
Optional piezoelectric tiles harvest energy from every footstep, extending battery life by up to 30%. A completely unique story in the smart home market — the detail that earns Wired and Dezeen coverage.
Your parcel has been outside since 11am. Dory checks OpenWeatherMap every 30 minutes. Rain incoming? You get an alert with enough time to act. Nobody else does this. It will be the most-forwarded feature of the campaign.
Ring shows you the thief. DoryMat catches it the moment it happens — because only a mat can feel both the parcel disappearing and the absence of a footstep approaching.
Each mat is tuned for a different pressure signature. Together they unlock features neither can achieve alone.
Tuned for footsteps. Arrival, departure, visitor detection, and household pattern intelligence.
Tuned for static weight. Parcels, weather exposure, theft detection, returns workflow.
The correlation between the two mats is where the real intelligence lives.
Package weight disappears without a corresponding inward footstep. That correlation is a theft event. Alert fires immediately. Ring shows you after. Dory catches it the moment it happens.
Neighbour collects whilst you’re away — door mat logs their arrival, package mat weight disappears. System knows it was intentional. Clean confirmation, no false alarm.
You’re home — arrival detected. Parcel arrives 10 minutes later. No alert fires because the system knows you watched the driver leave it. Confidence beats information density.
Every arrival, departure, delivery, collection, and visitor compiled into a single AI-synthesised timeline. One coherent story of your front door, every day.
Not surveillance. Gentle awareness. The adult child in Manchester who stops worrying about their parent in Leeds. The parent at work who knows their teenager got home safely. A notification that arrives before anxiety does.
The Package Mat works standalone for Ring and Nest owners. The Duo is where the real intelligence lives.
Complete bill of materials with supplier links, API integration guide, full tech stack architecture, and a build timeline from bench prototype to first production run.
All costs at MOQ 500. Prototype parts from SparkFun and Adafruit; production from JLCPCB and Alibaba. All links are live.
| Component | Specification | Where to Buy | Cost (MOQ 500) |
|---|---|---|---|
Flexible Pressure Sensor Grid 8×8 matrix · 64 sensing points · flexible PCB | Velostat/FSR array · 75×45cm · 0–100kg | sparkfun.com — Force Sensing Resistorsinterlink.com — FSR specialist (production)aliexpress.com — flexible FSR matrix (bulk) | £10–16 |
ESP32-S3 Module Dual-core 240MHz · Wi-Fi b/g/n · BLE 5.0 · 4MB flash | ESP32-S3-WROOM-1 or ESP32-S3-MINI-1 | lcsc.com — best PCB order pricingmouser.co.uk — UK distributor (certified)adafruit.com — dev boards for prototyping | £2–3 |
Weatherproof Puck Enclosure IP65 rated · 68×32×16mm · USB-C sealed port | Custom injection mould — black ABS matte | protocase.com — custom enclosures (prototypes)hammond.co.uk — UK off-shelf optionsalibaba.com — injection mould (MOQ 500+) | £5–8 |
Premium Natural Coir Mat 75×45cm · 17mm pile · natural rubber non-slip backing | Indian coir Grade A · natural rubber base | matsdirect.co.uk — UK coir suppliernwtt.co.uk — National Weaving & Textile Tradingalibaba.com — wholesale from India/Bangladesh | £7–12 |
3,000mAh LiPo Battery 3.7V · PCM protection circuit · JST-PH 2.0 connector | 103450 format · CE certified | adafruit.com — 3000mAh LiPo (prototyping)rs-online.com — RS Components UK (certified)aliexpress.com — bulk production pricing | £4–6 |
TP4056 USB-C Charging Board 5V input · 1A charge rate · DW01A overcharge protection | USB-C module · status LEDs | lcsc.com — TP4056 charging modulealiexpress.com — TP4056 USB-C modules (bulk) | £0.80–1.50 |
Custom PCB + PCBA 2-layer board · KiCad design · SMD assembly | Designed in KiCad · manufactured and assembled in Shenzhen | jlcpcb.com — PCB + PCBA best pricepcbway.com — alternative for small runspcbtrain.co.uk — UK PCB for CE certification testing | £4–6 |
Piezo Tiles + LTC3588 IC PVDF film · 40×20mm per tile · optional energy harvesting | 4× piezo discs + supercap buffer + LTC3588 harvesting IC | te.com — TE Connectivity PVDF piezo filmsanalog.com — LTC3588 harvesting IC datasheetaliexpress.com — PVDF piezo film strips | +£6–9 |
Premium Gift Box Packaging Rigid two-piece box · custom print · foam insert | 380×260×60mm · matte cream · Dory Green logo | packagingeurope.com — custom box sourcingalibaba.com — custom rigid gift boxes | £2–3 |
| TOTAL BOM — Door Mat (without piezo · MOQ 500) | £35–54 | ||
Every integration documented with live documentation links, authentication method, and honest monthly cost per user.
Local automation triggers with sub-100ms latency — no cloud needed. Implement via open-source Matter SDK. Device appears simultaneously in Apple Home, Google Home, and Alexa. Matter certification ~£2,000 one-off for retail.
Polls rain and frost forecast when Package Mat has active weight — every 30 minutes per device. Free tier: 1,000 calls/day covers ~2,000 devices. Paid tier $40/month only required at 40,000+ devices.
Pulls active tracking numbers for cross-reference against package mat weight events. Free via developer portal. OAuth 2.0 — user connects their Royal Mail account during onboarding. Webhook support for delivery confirmation.
Live driver ETA, out-for-delivery status, delivery confirmation webhook. Free tier for tracking-only access. Driver ETA enables a pre-arrival alert: “DPD driver 10 minutes away.” Covers ~30% of UK consumer deliveries.
Full parcel lifecycle including returns tracking — the dominant UK returns carrier. Your existing Click2Send relationship may fast-track API access approval. Auth: carrier portal account + API key.
Generates the AI daily summary from raw mat event logs. Use claude-haiku-4-5 for cost efficiency. ~2,000 tokens input + 300 output per daily summary = ~£0.04/user/month. Prompt: structured JSON events → plain English narrative with anomaly detection.
Push notifications to iOS and Android for all alert types. FCM has no per-message charges. Firestore free tier covers 1GB + 50K reads/day, sufficient for first 5,000+ users. Guardian access uses row-level Firestore security per account.
Optional: when visitor or theft event fires, triggers camera snapshot attached to push notification. Google Nest requires $5 one-off developer registration. Ring API unofficial but stable and widely used.
Optional context layer: reads calendar to adjust pattern expectations and suppress anomaly alerts on known-busy days. Free tier 1M queries/day. OAuth 2.0 read-only scope only. Also useful as fallback for NHS appointment context before NHS Login API approval.
The complete stack from hardware polling to Claude AI summary. Seven layers, all tested technologies.
ESP32-S3 dev board + FSR sensors from SparkFun. Write pressure signature classifier in Arduino. Goal: reliably distinguish footstep from static weight from cat. Total: ESP32 dev board £8 + FSR sensors £15 + components £5.
Fit ESP32 + sensors under a real coir mat from matsdirect.co.uk (~£20). Add BLE GATT profile. Write simple iOS/Android test app. Validate range through a door. Hosepipe test for puck IP rating. Firebase push notifications working end-to-end.
Connect OpenWeather API (free key). Integrate Royal Mail Click & Drop. Build Firebase project. Write Claude API daily summary prompt — test against 7 days of fake event data. Full pipeline: sensor → Firebase → push notification on phone.
Design PCB in KiCad integrating ESP32-S3, TP4056 LiPo charger, sensor connectors, LED. Order 5× assembled PCBs from jlcpcb.com (~£40). 3D print prototype puck housing. First fully integrated hardware prototype with real battery life testing.
5 beta units to real households for 2 weeks. Film campaign video. Write Kickstarter page. Apply for Matter certification (3-month process — start now). Apply for DPD and Evri API access. Finalise pricing. Launch.
Shenzhen ODM for injection-moulded puck. PCBA at JLCPCB. Coir mats from India supplier. Custom matte cream gift boxes with Dory Green logo. CE/UKCA certification via UK test house (£2,500–3,500). UK 3PL fulfilment. Deliver to backers. Inside box message: “Welcome home.”
Unit economics, scenario analysis, break-even calculations, and a live profit calculator. Every number backed by real BOM costs at MOQ 500.
Kickstarter fees at 8% (5% platform + 3% payment processing). UK fulfilment rates. All costs at MOQ 500.
Conservative, realistic, and optimistic projections based on comparable Kickstarter hardware campaigns in the smart home category.
| Scenario | Units | Revenue | COGS+Fees | HW Profit | Net (post £25k) | Subs (6mo) | MRR |
|---|---|---|---|---|---|---|---|
| Minimum viableMIN 50 Duo + 100 Solo + 50 Pkg | 200 | £46,500 | £22,400 | £24,100 | −£900 | 40 users | £200/mo |
| Realistic targetTARGET 150 Duo + 100 Solo + 60 Pkg | 310 | £72,500 | £33,600 | £38,900 | +£13,900 | 78 users | £389/mo |
| Strong campaignBEST 300 Duo + 200 Solo + 100 Pkg | 600 | £143,000 | £64,000 | £79,000 | +£54,000 | 150 users | £748/mo |
Hardware margin is strong. The subscription is where DoryMat becomes a real, scalable business.
Unlocks: AI daily summaries, Guardian Premium write access and missed-routine alerts, multi-carrier real-time cross-referencing, household pattern intelligence. Hardware works fully without it — genuine value, not a paywall.