Bulletin of Electrical Engineering and Informatics Vol. 12, No. 5, October 2023, pp. 2753~2762 ISSN: 2302-9285, DOI: 10.11591/eei.v12i5.5134  2753 Journal homepage: http://beei.org Door lock system based on internet of things and Bluetooth by using Raspberry Pi Khalid Asaad Hashim 1 , Hamzah Hadi Qasim 2 , Abdulwahhab Essa Hamzah 3 , Ola Alkharasani Hasan 2 , Mustafa Al-Jadiri 2 1 Department of Electrical Power Technologies Engineering, Basrah Engineering Technical College, Basrah, Iraq 2 Department of Communications Engineering, Iraq University College, Basrah, Iraq 3 Department of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, Malaysia Article Info ABSTRACT Article history: Received Nov 2, 2022 Revised Dec 16, 2022 Accepted Feb 18, 2023 Recently, there are a large number of smart lock systems that can be used in the workplace or home, but many of them depend on finding an external key, password, fingerprint, and facial recognition, where these systems suffer from weakness as the physical key may be forgotten in a place, the password can be memorized which is hard for some peoples, and the fingerprint system sometimes does not work on people who suffer from chronic diseases, such as people with diabetes and for each of these systems the person needs a free hand so that he/her can open the lock which means that is if the person carries something he/her needs to be placed somewhere. The facial recognition system cannot recognize the person's face when the place has poor lighting. This paper proposes a home door lock system that relies on the internet of things (IoT) technology and portable electronic devices Bluetooth such as a smart mobile using the device Bluetooth media access control (MAC) address as a key and the IoT for monitoring, which leads to a door lock that does not require a free hand. The proposed lock system outcome can be a good candidate for home security applications. Keywords: Bluetooth Internet of things Media access control Raspberry Pi Smart door lock This is an open access article under the CC BY-SA license. Corresponding Author: Khalid Asaad Hashim Department of Electrical Power Technologies Engineering, Basrah Engineering Technical College Basrah, Iraq Email: khalidasaad36@gmail.com 1. INTRODUCTION In our daily life, we see many kinds of locks, which may be door locks in a certain place, car door locks. These locks are divided into traditionl and smart door lock (SDL) see [1]-[3], Figure 1. Generally, the origin of the mechanisms of locks and keys are still unknown. Although archaeological evidence of early locks remains scant, numerous articles and books have been written over past two centuries. Historically, from the beginning, all locking devices and keys were made entirely of solid wood, especially those seen in Egypt and Mesopotamia. The key made from wood appears to have emerged very early in most different cultures that rely on wood as basic material and even now as a key tool. Wooden locks make a lot of sense; they are very similar in how they operate and function [3]. In fact, various types of wooden key specimens are preserved in many houses and structures with traditional doors in most parts of the world, especially in the Mediterranean region. Alternatively, it is difficult to determine who inspired whom, in terms of the cultural impact of door locks, or whether the similarities can be seen as similar solutions to problems or needs common to all of humanity. It seems that the earliest simple tool locks and wooden keys may have been invented by several early civilizations at the same time [4]-[6]. In general, we can say that ropes and cords were used to tie doors, and legend has it that knotted ropes became a common symbol of safety in