Simple smart system to monitor and enhance the environmental comfort of the building occupants. The application is composed of:

• a WSN, developed in Contiki, whose goal is to monitor light and temperature of several rooms;
• an Android application that allows rooms' occupants to share their opinion about the living environment. Data are sent to a web database;
• a non-constrained node, developed in Californium, which acts as Relay between sensor nodes of the WSN, that periodically switch off their radio for energy conservation reasons, and the web database. In particular the relay is responsible for:
  • sending sensor's measurements to the database
  • computing and sending, for every room, the satisfaction index from occupants' opinion
• an actuation system simulated by LEDs placed on board of each sensor node.