Attendance Marker
Smart Kiosk System

Hello everyone, and welcome! Today I'm going to walk you through our Attendance Marker — a smart, kiosk-based attendance system developed by Inurum Technologies.

This is not just another punch-in app. This is a fully automated, always-on Flutter application running on an Android device, designed to handle hundreds of employee attendance records every single day — without anyone pressing a single button.

The Attendance Marker is a kiosk application installed on an Android tablet or phone that is permanently mounted at a building entrance, factory gate, or office lobby. It connects to an external RFID or NFC card reader via a USB cable.

Every employee is given a personal RFID card. When they arrive for work, they simply hold their card near the reader — and that's it. The system does everything else automatically.

No login screens. No passwords. No one has to touch the screen. The device runs 24 hours a day, 7 days a week, and it manages itself.

When no one is scanning, the device shows a beautiful ambient screen. Let me describe what you see.

The background changes based on the time of day. During working hours, you'll see a warm golden palette with a bright sun illustration — and a greeting that says "Good Morning!" or "Good Afternoon!" In the evening, that shifts to a cool deep indigo theme with a moon graphic and "Good Night." It feels alive.

The clock in the centre updates every single second. Below it, you see the date and full day name. And if the device has location access, it also shows the current temperature and wind speed — pulled live from the Open-Meteo weather API.

At the top you can always see two status indicators — the Wi-Fi connection icon and the data sync icon. Green means everything is live and in sync. If the internet drops, you'll see that change in real time.

There's also a scrolling marquee text that runs across the screen — this is configured from the server and can contain any announcement the company wants to push to the display. It refreshes every hour.

And right below the clock, you'll find the Quote of the Day — a daily motivational quote fetched from an external API, cached so it only changes at midnight. It gives the display personality and purpose beyond just a clock.

Now let's walk through what happens when an employee taps their RFID card.

The moment the card comes near the reader, the USB NFC reader sends a serial data packet to the Android device. Our app continuously monitors the USB serial stream, parses the raw data packet, and extracts the card's unique ID. This happens in milliseconds.

First, the app checks its local database to see if this card has been seen before. If yes, the attendance flow kicks in. If this is a brand new card — maybe a new employee who just joined — the system broadcasts it to the backend and shows an enrollment screen, prompting an administrator to assign the card to the right person.

For a known card and an active internet connection, two things happen simultaneously: the app streams a real-time event over a TCP socket to the Inurum server — including the RFID number, the device ID, and an exact Unix timestamp — and it also calls the REST API to retrieve the employee's full profile.

Once the profile comes back — which takes under a second — the device shows the attendance result screen. We see the employee's profile photo, their full name, and their check-in and check-out times for the day. The display transitions from the clock to a beautiful employee card.

Here's one of the clever parts. The system determines whether each scan is a check-in or a check-out automatically — using a simple but powerful rule.

The first scan of the day is always a check-in. The second is a check-out. The third is a check-in again. And so on. This means employees can tap in and out multiple times throughout the day — for lunch breaks or external trips — and the system handles all of it correctly without any configuration.

Check-ins show a green "Welcome!" greeting — and the system speaks the words out loud: "Welcome, Manish!" Using a clear, natural Indian English voice from the Text-to-Speech engine. Check-outs show an amber "Goodbye!" with a matching voice announcement.

At exactly 23:59:59 every night, the system runs an automatic checkout for every employee who is still marked as checked in. No one is left with a hanging open attendance record — ever.

After the result card is shown, it automatically disappears after 5 seconds, returning the screen to the ambient idle view — ready for the next person.

What happens if the internet goes down? This is a real concern for any attendance system.

Our app handles it gracefully. When the device detects it has gone offline, it continues to work perfectly. Every scan is saved to the device's local storage in our offline queue — with the device ID, the RFID, and the exact timestamp.

The employee still sees their profile and the result card — because we have the information cached locally from previous online scans.

The moment the internet connection is restored — automatically, without anyone doing anything — the app detects the reconnection, uploads all queued scans to the backend in a single bulk operation, and clears the queue. The sync icon at the top of the screen gives you real-time visual feedback of this process.

A few more intelligent features that make this truly kiosk-grade.

The app uses Android's Immersive Sticky mode — meaning the status bar and navigation bar are completely hidden. Employees cannot accidentally exit the app. The screen orientation is permanently locked — landscape for tablets, portrait for phones.

The screen wakelock is enabled from startup — so the device screen never turns off automatically. The kiosk is always ready.

After 5 minutes without any scan, the app dims the screen to 5% brightness and shows a minimal black ambient display — saving energy overnight. The moment anyone taps a card, the screen instantly returns to full brightness.

On tablets in landscape mode, if the backend has configured an advertisement, the idle screen splits in half — the left side shows the clock and ambient info, the right side streams a promotional video or image. This turns the kiosk into a dual-purpose communication display.

Each device has a unique Android hardware ID. This ID is included in every scan event, so the backend always knows exactly which device — which door, which floor, which building — a scan came from. Multi-device deployments are fully supported out of the box.

What you've just seen is a complete, production-ready attendance kiosk solution built entirely in Flutter and powered by the Inurum backend platform.

It handles the full attendance lifecycle — from card enrollment to daily check-ins and check-outs — reliably online or offline, with voice feedback, ambient intelligence, and zero manual maintenance required.

If your organisation is looking to modernise how attendance is tracked — with a system that is fast, accurate, beautiful to look at, and built to run 24 hours a day without failure — the Attendance Marker by Inurum Technologies is exactly that.

Thank you for watching. Tap your card, and let the system handle the rest.

Read the technical architecture →