  This paper presents a low-cost system architecture that has been proposed for
automatically monitoring air quality indoors and continuously in real-time. The
designed system is in pilot phase where 4 sensor nodes are deployed in indoor
environment, and data over 4 weeks has been collected and performance analysis
and assessment are performed. Environmental data from sensor nodes are sent
through ZigBee communication protocol. The proposed system is low in cost, and
achieves low power consumption. Hardware and network architecture are presented
in addition to real-world deployment.
