This paper presents an implementation of indoor positioning system using an Android smartphone and a Bluno-based system. Three Bluno prototypes are used as stations at predefined positions to locate the position of indoor users. These three Bluno prototypes send their ID and Received Signal Strength Indicator (RSSI) to an Android smartphone used by a user. Based on this information, a trilateration positioning technique is used to position the user. The demonstration results show the validity and effective of the system.