Casambi Explained: Smart Lighting Control via Bluetooth – Function, Benefits & Applications
What Is Casambi?
Casambi is a wireless lighting control system based on Bluetooth Low Energy (BLE) – the same energy-efficient wireless technology used in smartphones, fitness trackers and modern watches. Developed by the Finnish company Casambi Technologies Oy, the system allows luminaires to be conveniently controlled, dimmed and organised into scenes via app – without any additional control wiring, without Wi-Fi and without an internet connection.
In recent years, Casambi has established itself as one of the leading standards for smart lighting control in the design, residential and commercial sectors. More than 5 million Casambi-enabled products are in use worldwide, and the Casambi ecosystem comprises over 300 luminaire manufacturers and more than 100 component manufacturers.
How Does Casambi Work?
The basic principle behind Casambi is simple: every Casambi-enabled luminaire contains a small Bluetooth chip. These chips allow the luminaires to communicate with one another, collectively forming a so-called mesh network – an intelligent wireless network in which each luminaire can receive signals and relay them to the next.
This means the more Casambi-enabled luminaires installed in a room or building, the larger and more stable the network becomes. Unlike systems with a central router or gateway, Casambi has no single point of failure – if one luminaire goes offline, the rest of the network continues to operate.
Control is via the free Casambi app for iOS and Android. It allows you to dim individual luminaires or luminaire groups, create and recall lighting scenes, programme timers and schedules, adjust the colour temperature on luminaires with tunable white, and integrate sensors and wall switches.
No internet connection is required for normal operation. The system works entirely locally via Bluetooth. An optional internet gateway (Casambi Cloud Gateway) can be added if remote control from outside the building is desired.
What Do You Need for Casambi?
Many premium luminaires come with Casambi technology integrated as standard – they are ready to control as soon as the Casambi app is installed. For luminaires without built-in Casambi functionality, external Casambi modules (known as CBU units) can be retrofitted. These compact modules are wired between the mains connection and the luminaire, making it Casambi-compatible.
Beyond that, the Casambi ecosystem offers a wide range of accessories: wireless wall switches (Casambi Xpress), motion and presence sensors, daylight sensors, DALI gateways for integrating hardwired DALI luminaires, and cloud gateways for remote control.
Important to note: no gateway, no Wi-Fi router and no smart-home hub is required. This sets Casambi apart from many other smart-home systems and makes it exceptionally straightforward to install.
Casambi vs. DALI vs. KNX – What Are the Differences?
In professional lighting technology, several control systems are available. The three most widely known are Casambi, DALI and KNX. They differ primarily in wiring requirements, flexibility and installation effort:
DALI (Digital Addressable Lighting Interface) is a widely used standard in which luminaires communicate via a dedicated DALI control cable. DALI offers high flexibility and is used predominantly in offices and commercial buildings. However, retrofitting requires additional control wiring to be installed.
KNX is a comprehensive building automation system that can control not only lighting but also heating, blinds and other building services. KNX offers maximum functionality but requires a dedicated KNX bus and professional planning. The installation effort and costs are correspondingly high.
Casambi operates entirely wirelessly via Bluetooth and requires no additional control wiring. This makes it particularly attractive for retrofitting in existing buildings and for projects where flexibility and ease of installation are the priority. Casambi can also be combined with DALI installations – dedicated DALI gateways allow existing DALI luminaires to be incorporated into a Casambi network.
What Can You Control with Casambi?
Casambi offers all the control functions you would expect from a professional lighting control system:
- Grouping: Luminaires can be grouped together and controlled collectively – for example, all luminaires in a room or zone.
- Scenes: A scene stores a specific lighting mood: dim level, colour temperature and distribution. This allows you to switch between "task lighting", "evening ambience" or "presentation" at the touch of a finger. Up to 255 scenes are possible per network.
- Animations: Dynamic lighting sequences in which the light automatically transitions between different scenes – for instance, a slow colour gradient in a restaurant.
- Timer Control: Automatic switching times so that the lighting turns on in the morning and dims in the evening.
- Daylight Control: In combination with a daylight sensor, Casambi automatically adjusts the luminaire brightness to match the available natural light. This saves energy and ensures consistent visual comfort.
- Presence Control: With motion or presence sensors, the light only switches on when people are present in the room – ideal for corridors, stairwells and offices.
- Tunable White: For luminaires with adjustable colour temperature, Casambi allows the colour temperature to be continuously adjusted from warm white (e.g. 2,700 K) to neutral white (e.g. 4,000 K) or beyond. This also supports Human Centric Lighting (HCL) concepts.
Where Is Casambi Used?
The applications for Casambi are wide-ranging:
- Residential Spaces: Individual lighting scenes for living rooms, bedrooms, kitchens and open-plan layouts. The lighting mood can be adapted to any time of day and activity via the app.
- Hospitality and Hotels: Atmospheric lighting scenarios without complex electrical installation. Lighting scenes can be switched effortlessly via the app between breakfast, lunch service and evening ambience.
- Offices and Workspaces: Daylight-responsive control, presence detection and individual workplace lighting deliver comfort and energy savings.
- Retail and Showrooms: Flexible lighting scenes for changing product displays and shop-window illumination – adjustable without an electrician.
- Museums and Galleries: Precise lighting direction for changing exhibitions, without having to alter the wiring each time.
- Outdoor Areas: With the appropriate modules, Casambi can also be used for façade lighting, garden lighting and pathway illumination.
Which Luminaire Manufacturers Use Casambi?
Numerous renowned luminaire manufacturers offer luminaires with integrated Casambi control. Casambi has become the preferred standard particularly in the premium and design segment. For example, the Occhio air app is based on the Casambi standard – all Occhio luminaires with Occhio air technology are therefore fully compatible with the entire Casambi ecosystem and can be seamlessly controlled alongside Casambi luminaires from other manufacturers within a shared network. The German outdoor lighting specialist IP44.de also relies on Casambi as the control technology for its smart luminaires. The Italian design manufacturers Artemide and Luceplan likewise offer selected luminaire models with integrated Casambi control. All of these luminaires can be incorporated into individual lighting scenes via the Casambi app and combined across manufacturers in a single shared network.
How Secure Is Casambi?
Casambi employs multiple layers of security: communication within the mesh network is encrypted with AES-128. A unique key is generated for each new connection between the app and the network. Four network security levels are available – ranging from open access to administrator-only control with e-mail authentication. In addition, different user roles (administrator, manager, user) can be assigned to determine who may operate the lighting and who may modify the configuration. Cloud services are hosted on the Microsoft Azure platform. Casambi has also received the ioXt Alliance cybersecurity certification.
What Are the Benefits of Casambi?
- No additional wiring required – ideal for existing buildings and retrofitting
- No gateway, no Wi-Fi and no internet needed for normal operation
- Simple commissioning and intuitive app-based control
- Scalable: from a single luminaire to networks comprising hundreds of luminaires
- Cross-manufacturer compatibility: all Casambi-enabled products work seamlessly together
- Future-proof: firmware updates are delivered wirelessly over the network
- Energy-efficient through automatic daylight and presence control
- Encrypted communication and differentiated access rights
Are There Any Limitations?
Like any system, Casambi has certain limitations: the range of the Bluetooth signal depends on the structural conditions and materials – metal housings or solid walls can reduce the range. In very large or complex buildings with few luminaires, mesh coverage may therefore require careful planning. For highly complex building automation (heating, ventilation, blinds), Casambi is not a complete replacement for KNX, but it can serve as a complement.
Frequently Asked Questions (FAQ)
Do I need Wi-Fi or internet for Casambi?
No. Casambi operates exclusively via Bluetooth Low Energy and works entirely locally. An internet gateway is only required if remote control from outside the building is desired.
Which luminaires are compatible with Casambi?
Many premium manufacturers – including Occhio, IP44.de, Artemide, Luceplan, Nimbus and numerous others – offer luminaires with integrated Casambi control. In addition, many dimmable luminaires can be retrofitted with an external Casambi module.
How many luminaires can a Casambi network control?
A single Casambi network can manage up to 250 devices. For larger installations, multiple networks can be set up.
Can I combine Casambi with existing DALI luminaires?
Yes. Via Casambi DALI gateways (e.g. the Salvador series), existing DALI installations can be integrated into a Casambi network. Each DALI luminaire then appears as a controllable luminaire in the Casambi app.
Is Casambi also suitable for outdoor use?
Yes. There are Casambi modules and luminaires specifically designed for outdoor applications. It is important to ensure the appropriate ingress protection rating (at least IP44, preferably IP65) for the luminaires.
Can Casambi be retrofitted?
Yes, and this is one of its greatest strengths: since no additional control wiring needs to be installed, Casambi is ideally suited for retrofitting in existing buildings.
In Summary:
Casambi makes smart lighting control simple, flexible and future-proof – without complex installation or additional wiring. The Bluetooth-based mesh technology is equally suited to private living spaces and professional lighting concepts in hospitality, hotels, offices and retail. Thanks to cross-manufacturer compatibility, luminaires from different brands can be united within a single shared network. At Leuchtenland.com you will find a wide selection of Casambi-compatible luminaires, Casambi modules and Casambi accessories for your smart lighting concept.
