1. Hytronik HCD038/BT Bluetooth control module — integrated within each luminaire.
To retain the original design and accommodate the small internal space (due to the emergency module), the team installed a compact Bluetooth control module.
Each luminaire became a node in a mesh network, ensuring stable communication even within the heavily reinforced environment of concrete and steel.
2. Hytronik SAM20 microwave sensor — optimised for tight, metallic spaces.
The initially used sensors triggered false detections because of reflections from the metal structure.
The SAM20 sensor, designed for narrow spaces, was selected — it detects only real movement within the intended stair segment, avoids unwanted triggers on other floors, and ensures a fluid, precise lighting sequence.
3. External antenna to strengthen communication where shielding was too severe.
In certain sections of the stairwell, the wireless signal was trapped between steel and concrete.
By adding an external antenna, the team extended communication reach and ensured the mesh network remained stable and continuous throughout the full height of the stairwell.
Simplified configuration thanks to Koolmesh’s dedicated staircase mode.
4. The entire setup was configured through the Koolmesh app.
A key advantage: Koolmesh offers a “staircase” scene, designed specifically for sequential lighting behaviour floor by floor.
All that was needed was to:
- Order the luminaires according to their actual physical position,
- Adjust sensor sensitivity, timings, and standby light levels,
- And validate the final behaviour from a mobile device. This avoided working at height and greatly reduced installation time.
5. Easy maintenance via QR‑code network export. Once configured, Koolmesh allowed the network to be exported via a QR code — giving the client an exact copy of the programming for future adjustments, without requiring technical intervention.
