A blog about security systems, networks and IoT
Security systems, networks and IoT — explained in practice
Articles and guides on video surveillance, access control, alarm systems, computer networks and telemetry.
25articles
10sections
08.09.2026last update
Latest articles
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Corporate Network Security Policies — the Foundation of a Successful Business and Organization
The rules that make a corporate network secure — from administrator rights and social engineering, through ransomware, to firewalls, content filtering and VPN control.
MikroTik Releases Urgent Security Fix for RouterOS
MikroTik has reported a vulnerability in RouterOS and released patched versions in all update channels. The vendor recommends checking devices after updating.
Operation CameraSwarm: Over 14,500 Dahua Cameras Compromised in Ukraine and Russia
According to Hunt.io, more than 14,500 Dahua IP cameras were compromised in just 35 days through weak passwords, old authentication bypass flaws and the vendor's cloud P…
Information Kiosks for Urban Spaces: Interactive Displays for Parks and Public Areas
More and more parks and city centres are installing interactive information kiosks: weatherproof touchscreens that show a city map, events and air quality.
Smart Camping: Managing Electricity, Water and Services in Campsites
Hook-up pillars with controlled power supply, per-pillar water metering and an online dashboard for check-in and revenue: how a campsite management system works.
Software for Free Space Detection and Statistics in Car Parks and Car Washes
Cameras, an LED display and online statistics show in real time which parking spaces are free and how busy the car wash is.
LoRa and LoRaWAN for Remote Monitoring of Water Facilities
How LoRaWAN works, what it can monitor and control in reservoirs, water supply networks and irrigation systems, and where the technology reaches its limits.
Digital Condominium Management: How a Lobby TV Display and Web Portal Work
House register, fees, the Repair and Renovation Fund, entrance access and general assemblies in one system. How the manager and owner web portal and the lobby TV display work.
Access control
All in this section (4)
Restroom Access with a QR Code from the Till Receipt: How the System Works
A till receipt can act as a pass to a venue's restroom. How the QR code on a fiscal receipt and RFID cards limit access to customers only, offline and without fees.
RFID Access Control: Cards, PIN and Mobile Access for Offices and Buildings
Access control systems are no longer reserved for large corporations. How RFID cards, PIN codes and mobile access work, and what the law requires when biometrics come in…
Alarm systems
All in this section (3)
Wireless Alarm Systems: Reliable Protection Without Cable Runs
Wireless alarm systems offer the same level of protection as wired ones, without costly building work. What their advantages are and which components they consist of.
Alarm System for a Holiday Home: How to Protect a Property That Stands Empty
How to plan a self-monitored alarm system for a holiday home or a house outside town: perimeter and interior protection, GSM alerts, video verification and common mistakes.
Computer networks
All in this section (4)
Corporate Network Security Policies — the Foundation of a Successful Business and Organization
The rules that make a corporate network secure — from administrator rights and social engineering, through ransomware, to firewalls, content filtering and VPN control.
Building a Reliable Office Network, Step by Step
A solid network infrastructure is the backbone of every modern business. Here are the key elements in designing and building an office LAN and Wi-Fi network.
Parking systems
All in this section (3)
Software for Free Space Detection and Statistics in Car Parks and Car Washes
Cameras, an LED display and online statistics show in real time which parking spaces are free and how busy the car wash is.
Automated Parking: ANPR Barriers, Space Counting and Pay Stations
How automated parking works at a retail or office site: barriers with licence plate recognition, free-space displays, pay stations, tariffs and common design mistakes.
IoT & telemetry
All in this section (2)
Smart Camping: Managing Electricity, Water and Services in Campsites
Hook-up pillars with controlled power supply, per-pillar water metering and an online dashboard for check-in and revenue: how a campsite management system works.
LoRa and LoRaWAN for Remote Monitoring of Water Facilities
How LoRaWAN works, what it can monitor and control in reservoirs, water supply networks and irrigation systems, and where the technology reaches its limits.
Public displays
All in this section (3)
Information Kiosks for Urban Spaces: Interactive Displays for Parks and Public Areas
More and more parks and city centres are installing interactive information kiosks: weatherproof touchscreens that show a city map, events and air quality.
Digital Condominium Management: How a Lobby TV Display and Web Portal Work
House register, fees, the Repair and Renovation Fund, entrance access and general assemblies in one system. How the manager and owner web portal and the lobby TV display work.
Software & apps
All in this section (2)
Android Studio on macOS: Professional Android App Development
Many developers assume Apple computers are only for building iPhone apps. In fact, macOS is one of the best platforms for Android app development as well.
How Are iPhone Apps Built with Android Studio?
Many people assume Android Studio is only for building Android apps. Thanks to Flutter, it can be used to develop iPhone apps as well.
Tech news
All in this section (2)
MikroTik Releases Urgent Security Fix for RouterOS
MikroTik has reported a vulnerability in RouterOS and released patched versions in all update channels. The vendor recommends checking devices after updating.
Operation CameraSwarm: Over 14,500 Dahua Cameras Compromised in Ukraine and Russia
According to Hunt.io, more than 14,500 Dahua IP cameras were compromised in just 35 days through weak passwords, old authentication bypass flaws and the vendor's cloud P…