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The rapid growth of the Internet of Things paradigm is pushing the need to connect billions of battery-operated devices to the internet and among them. To address this need, the introduction of energy-efficient wireless mesh networks based on Bluetooth provides an effective solution. This paper proposes a testbed setup to accurately evaluate and compare the standard Bluetooth Mesh 5.0 and the emerging energy-efficient Wirepas protocol that promises better performance. The paper presents the evaluation in terms of power consumption, energy efficiency, and transmission latency which are the most crucial features, in a controlled and reproducible test setup consisting of 10 nodes. Experimental results demonstrated that Wirepas has a median latency of 2.83ms in Low-Latency mode respectively around 2s in the Low-Energy mode. The corresponding power consumption is 6.2mA in Low-Latency mode and 38.9&#x00B5;A in Low-Energy mode. For Bluetooth Mesh the median latency is 4.54ms with a power consumption of 6.2mA at 3.3V. Based on this comparison, conclusions about the advantages and disadvantages of both technologies can be drawn.

Latency and Power Consumption in 2.4GHz IoT Wireless Mesh Nodes: An Experimental Evaluation of Bluetooth Mesh and Wirepas Mesh