Indoor electrical device control based on activity context and number of occupant utilizing Google Calendar and WSN

Each room in a building has a certain function, for example a lecture hall for learning and teaching activities. Electrical devices in the campus building commonly will be used in accordance with the schedule of room usage. In this paper, we proposed an indoor electrical device control system, which is able to adapt to the kinds of activities and the number of people. The system consists of controller layer and automation layer. Controller layer is software that is integrated with Google Calendar and automation layer is related with hardware infrastructure for controlling. Agendas stored in Google Calendar will be a trigger for those controlled electrical devices. The developed system was given with two kinds of tests, i.e., performance and functionality test. The performance test was applied by measuring the response time when turning the device on/off. The test showed that the average response time needed to turn it on was 2,28 seconds and to turn it off was 2,32 seconds. The result from functionality test showed the capability of the system to control electrical devices in accordance with the kinds of activities and the number of the occupants.