Smart Door Locks — Datasheet

Overview

Overview

Smart Door Locks replace the brass deadbolt on your front door with a keyless, app-managed lock that opens by fingerprint, PIN, RFID card, smartphone Bluetooth, or — if you really must — a physical key. Every entry is logged. Every guest gets their own time-limited code.

Built for households tired of lost keys, hidden spare keys under doormats, and the awkward dance of letting cleaners or dog-walkers in remotely. Installs over your existing deadbolt cut-out in under 15 minutes, runs for 8–12 months on 4×AA batteries, and works offline — internet outages do not lock you out.

• 5 ways to open — fingerprint, PIN keypad, RFID card, app/BLE, mechanical key backup
• Time-limited guest codes — Airbnb, cleaners, deliveries with windowed access and use limits
• Full audit log — every entry timestamped with user identity, exported as CSV
• Auto-lock & geofence — door secures itself; unlocks when your phone arrives home

How It Works

The diagram above walks through a single unlock cycle. Hover any module to see live telemetry from a lock in the wild.

1. The lock sits on your door — keypad, fingerprint reader and status LED on the outside, motorised deadbolt cam inside. Powered by 4×AA cells with low-battery alerts months in advance.
2. Auth methods verify who you are: capacitive fingerprint sensor (sub-second match), 4–10 digit PIN, RFID/NFC card or tag, app unlock over Bluetooth (auto-unlock on geofence approach), or a temporary guest code.
3. Audit log writes every event to encrypted cloud storage — who, when, which method, success or fail — viewable as a timeline and exportable.
4. App & guests let any account holder lock/unlock from anywhere, issue guest codes with windows and use limits, set auto-lock timers, and flip between Home and Away modes.

Features

• Fingerprint sensor — capacitive, sub-second match, up to 100 prints stored
• Backlit PIN keypad — anti-peek random key shuffle, 4–10 digit codes
• RFID / NFC — works with cards, key fobs and NFC-enabled phones
• App unlock + auto-unlock — BLE proximity + geofence so the door opens as you arrive
• Guest codes / eKeys — date/time windows, use-count caps, instant revocation
• Auto-lock — programmable 10s / 30s / 1min / 5min after closing, with door sensor
• Lockout protection — auto disable keypad after N failed attempts, push alert
• Audit log — every event timestamped with identity, CSV export
• Mechanical key backup — physical key cylinder hidden under the faceplate
• Voice assistants & routines — Alexa, Google, HomeKit, Matter, IFTTT, SmartThings

Use Cases

• Family front door — every family member has a fingerprint; nobody carries a key
• Airbnb / short-term rental — auto-generate unique codes per booking, expire after checkout
• Cleaner / dog-walker access — recurring weekly window, time-of-day restricted
• Package delivery / contractor — single-use code valid for a 2-hour window
• Kids home from school — fingerprint or 4-digit PIN, push notification when they arrive
• Aging-in-place & carers — remote unlock for daily care visit, audit log for family
• Small office front door — staff badges via RFID, after-hours auto-lock, log for HR

Specifications

• Form factor: Retrofit (inside-only) or full replacement deadbolt · ANSI Grade 2, BHMA-certified
• Finishes: Satin nickel, polished brass, matte black, oil-rubbed bronze
• Door fit: 1-3/8" to 2-1/4" thick doors, US standard 2-1/8" bore
• Auth methods: Fingerprint (100 max), PIN (250 max), RFID (50 max), BLE app, mechanical key
• Connectivity: Bluetooth 5.0 (always on), Wi-Fi 2.4 GHz (via lock or bridge), Matter over Thread, Zigbee variant
• Power: 4×AA alkaline (8–12 months) · 9V emergency boost terminal on outside · USB-C low-battery jump
• Security: AES-128 encrypted radio, TLS 1.3 to cloud, signed firmware, lockout after failed attempts
• Environmental: IP54 outside-facing, −20 to +55 °C, anti-pry alarm sensor
• Certifications: ANSI/BHMA Grade 2 (1-Star security), FCC, CE, UL294 (commercial variant)
• App / ecosystem: iOS, Android, web · Alexa, Google Home, HomeKit, Matter, SmartThings, IFTTT

Product information

Customisation options

• Lock style — full deadbolt replacement, retrofit (keeps your existing exterior cylinder), or smart lever handle / mortise lock
• Finish — satin nickel, polished brass, matte black, oil-rubbed bronze, antique gold
• Auth combo — pick any mix of fingerprint, PIN keypad, RFID/NFC, app-BLE, mechanical key; PIN-only or no-keypad variants available
• Connectivity — Bluetooth only, Wi-Fi bridge add-on, built-in Wi-Fi, Matter-over-Thread, Zigbee, or Z-Wave
• Door fit kit — 1-3/8" to 2-1/4" door thickness adaptors, US 2-1/8" or EU euro-cylinder versions
• Guest-code policy — Airbnb / VRBO API auto-codes, recurring schedules, single-use, time-windowed
• Power option — 4×AA alkaline, rechargeable Li-ion pack with USB-C, hard-wired 12 V option
• Integrations — Alexa, Google Home, Apple HomeKit, Matter, SmartThings, IFTTT, Home Assistant, custom REST/webhooks

Ordering & lead time

Standard lead time depends on current stock. For volume orders, please contact our team for a structured quote including BOQ, freight, installation and warranty terms.

Support

Engineering support, installation guidance and warranty claims are handled by our customer success team. Reach us at support@sgtsystems.com or via the channels listed on our Contact page.