###### Abstract  
This paper presents the design and implementation of a versatile IoT testbed utilizing the openHAB platform, along with various wireless interfaces, including Z-Wave, ZigBee, Wi-Fi, 4G-LTE (Long-Term Evolution), and IR (Infrared Radiation), and an array of sensors for motion, temperature, luminance, humidity, vibration, UV (ultraviolet), and energy consumption. First, the testbed architecture, setup, basic testing, and collected data results are described. Then, by showcasing a typical day in the laboratory, we illustrate the testbed's potential through the collection and analysis of data from multiple sensors. The study also explores the capabilities of the openHAB platform, including its robust persistence layer, event management, real-time monitoring, and customization. The significance of the testbed in enhancing data collection methodologies for energy assets and unlocking new possibilities in the realm of IoT technologies is particularly highlighted.  
IoT; openHAB; sensors; wireless communication; energy efficiency; occupant comfort; smart building; data analysis +
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appliances in a smart home environment. It also allows users to build their own smart home automation systems and provides a flexible and extensible framework for integrating various IoT devices and services.  
The IoT testbed described in the current work utilizes a variety of wireless interfaces and sensors to collect data from various sources. The Z-Wave and ZigBee protocols are popular choices for home automation and have been used in several previous studies [7, 8]. Wi-Fi is a widely used wireless communication technology that is suitable for high-speed data transmission [9]. Moreover, 4G-LTE is a cellular communication technology that provides high-speed internet access and has been used in various IoT applications, such as smart transportation and healthcare [10, 11]. IR wireless communication is widely used for remote control of home appliances.  
The sensors used in the testbed include motion, temperature, luminance, humidity, vibration, UV, energy, and switch sensors. These sensors are commonly used in IoT applications for monitoring and controlling various systems and appliances in smart homes, cities and industries. The openHAB platform is used as the underlying architecture to integrate these devices and protocols.  
The main contributions of this paper are the design, implementation and evaluation of an IoT testbed for wireless sensor networks. The proposed testbed is based on the openHAB platform and provides a flexible and standardized solution for integrating various wireless protocols and sensors. Additionally, we provide a detailed description of the testbed architecture, the sensors used and the experimental setup. The results obtained from the experiments demonstrate the effectiveness of the proposed testbed for evaluating the performance of different wireless interfaces and sensors in an IoT environment. First, a detailed description of the IoT testbed setup is provided, including the employed components and their functionalities. Then, the openHAB platform and its role in the IoT testbed is discussed. Next, the results of basic testing performed on the testbed are presented, including observations made and how they relate to the wireless systems and sensors used. Finally, we draw conclusions based on the results obtained and discuss future work that can be carried out to improve the IoT testbed.