Background: The lighting researchers are keenly looking for the huge benefits of the internet
of things on an open platform which provides the cost gains in addition to other environmental
benefits. Connected systems interact with the software and analyse real-time building conditions,
and feed information into the building controls network.
Methods: This paper presents a wireless networked system for lighting control in buildings which
connect the power of the Internet of Things. After analysing the ZigBee network on QualNet v7.4, a
Digi Mesh network was set up using XBee modules using the XBee Configuration and Test Utility
[XCTU] Software v6.3.11. The ThingSpeak cloud platform along with MATLAB 2017b provides
the necessary cloud support to enable this network to communicate over the internet. The results indicate
that the XBee S2C module functioning in the API mode when flashed with the DigiMesh
firmware offers the best option for forming a self-healing mesh network. An aggregator node acts as
an information sink and collects the sensor data from all the sensor nodes and passes it on to the
cloud via the Raspberry gateway.
Results: The algorithm on the cloud can read this sensor data and compute the necessary Pulse
Width Modulation [PWM] signals required to control the brightness of a dimmable LED luminaire.
The system also takes into consideration the zone-wise occupancy in the room while computing the
PWM values to be sent to the luminaires.
Conclusion: The use of the concept of open platform sensors and actuators is the significance of the