Developed by ASGARDBUD
AB-ALERT — air-raid alerts with no one at the console
The system receives official air-raid alert data on its own, switches on a siren, light boards or a voice message, and shows the status of every site in a web panel.
How it works
From official alert to siren — no human needed
The three tiers of the system (server, on-site device and web panel) work automatically. People are needed only for setup and oversight.
The server receives the alert
Every 10 seconds the system core polls the official air-raid alert data source and determines the status for your region.
The device gets the status
The on-site device contacts the server on its own every 5 seconds. No open ports or static IP address required.
Relays and audio fire
A siren, light board or other relay-driven equipment switches on, and a recorded voice message plays.
You see everything in the panel
The web panel shows each site's status, relay states, device temperature and a log of all events.
Features
What the system can do
Flexible scenarios tailored to your site, not one siren for every case.
Eight independent relays
Siren, light board, shelter magnetic lock, amplifier channel switch: each relay is configured separately.
Voice alerts
Custom audio messages are uploaded in the web panel, trimmed right in the browser and assigned to the events you need.
Alert levels
Red and yellow alerts, all-clear and separate events for transitions between levels. Each event gets its own relay and message.
Flexible algorithms
Steady, pulsed, timed, timed pulses, or repeating every few cycles — to remind people rather than wail nonstop.
Web control panel
Sites on a map and in a list, connectivity, temperature, logs, manual alert and all-clear, test of every relay.
Fault tolerance
Internet down — the fault relay closes. Device frozen — a hardware watchdog reboots it. Settings and audio are stored locally.
Where it's needed
Industrial sites
In a noisy workshop the siren is backed up by light boards, and the shift is led to the shelter in an orderly way along a set route. A separate relay can signal the security team or open the shelter doors.
Residential complexes and homeowners' associations
Alerts in stairwells and the parking garage, connection to an existing PA system, automatic opening of the shelter. The association's chair can see the system status from a phone.
Schools and kindergartens
A calm voice message instead of a harsh siren for children, a separate signal for staff, and a clear all-clear when the alert is over.
Retail and offices
Visitors are alerted through the background music system: a relay switches the amplifier channel, and instead of music a message plays telling people where to go.
Events and relays
Each event is a separate settings row: which relays to use, how exactly they operate and which message to play. Typical values are shown below.
| Event | Relay | Behavior |
|---|---|---|
| Red alert | 1 | While the alert lasts |
| Yellow alert | 2 | While the alert lasts |
| All-clear | 3 | 30 seconds after the alert ends |
| Change warning | 4 | 1 second on every change |
| Server connection | 5 | Short pulse on each response |
| Fault | 6 | While there is no connection |
| Level down | 7 | On red → yellow transition |
| Level up | 8 | On yellow → red transition |
An all-clear is shown only when there actually was an alert before it. A network error is not treated as an all-clear: if the server does not respond, the device keeps its current state and signals a fault.
Security and roles
The web panel has two roles. The Administrator configures algorithms, audio, devices and users. The Operator sees the status and can manually trigger an alert or all-clear but cannot change settings. Every action is logged: who, when and from which address. Login is protected against password brute-forcing.
Pricing
The cost depends on the number of sites, existing equipment (sirens, amplifiers, light boards) and the scope of installation. Send us the type of site and its approximate area, and we'll get back to you with a preliminary solution and estimate. The survey and consultation are free.
Technical specifications
The hardware in brief
The device is built on a single-board computer with a relay board and a line-level audio output.
- Outputs
- 8 dry-contact relays
- Switching
- up to 250 V AC, 10 A per channel
- Audio
- 3.5 mm line output, custom messages
- Power
- 5 V / 3 A, UPS recommended
- Network
- Ethernet or Wi-Fi, outbound connections only
- Open ports
- not required
- Polling interval
- 5 s (configurable)
- Offline operation
- settings and audio stored on the device
- Freeze protection
- hardware watchdog
- Scalability
- one server handles dozens of sites
FAQ
AB-ALERT FAQ
Where does the system get alert data?
The AB-ALERT core polls the official air-raid alert data source every 10 seconds and determines the status for the relevant region. On-site devices receive this status from our server.
Do I need a static IP address or open ports?
No. The device initiates the connection to the server itself, so ordinary internet access over Ethernet or Wi-Fi is enough.
What happens if the internet goes down?
A dedicated fault relay closes so staff know about the problem right away. Settings and audio messages are stored on the device, and a hardware watchdog reboots it if it freezes.
Can I connect an existing PA system?
Yes. A relay switches the amplifier channel, and the message plays instead of music. There is a delay before the message starts so the relay has time to switch.
Can an alert be triggered manually?
Yes, from the web panel: an operator can manually trigger a red or yellow alert or an all-clear, for example for drills.
Contacts
Tell us about your site
We reply during business hours and can visit the site if needed. The consultation is free.
- Phone
- +380 (73) 140-80-18
- Address
- 15 Yakuba Kolasa St., Kyiv, Ukraine
- Hours
- Mon–Fri 9:00–18:00 · 24/7 emergency line