Automatic gate using Bluetooth technology (Open the gate with the strength of the Bluetooth signal on the smartphone)

This paper introduces the use of Bluetooth as an automatic door opener. From the existing door system, the RFID card or fingerprint are used to identify the person to open the door automatically. In the proposed system, we change the identification from RFID card or fingerprint to Bluetooth signal sent from the user's smartphones. It is because our observe, the users often forgot their RFID cards and there are many errors when the users use their fingerprint with the finger-scanner. From the evaluation results show that proposed system, Bluetooth can reduce the waiting time and error to open the door compared with RFID card. Moreover, because the proposed system uses the value of the RSSI from Bluetooth on the smartphone to be converted to the distance between users and the door, we also find the optimal distance that the door should open when the user comes to the door.