Short Range Wireless


moving together. Both are more firmly than ever aimed at diverse IOT applications. There remain significant differences however – Bluetooth Low Energy still offers far better low power characteristics than WiFi 6 and the data rate capabilities of WiFi still far outstrip Bluetooth. Bluetooth frequency hopping technology will still prove more resilient in noisy environments and ad-hoc connectivity is still going to be easier using Bluetooth. A convergence would perhaps be a better way of putting it. IOT applications


are becoming more sophisticated and often one radio technology is not enough. One flip side of the advances in WiFi 6 is that the router must become an even more complex device than ever, managing more connections with differing demands. The MATTER home automation standard is a good example of trying to manage different radio standards under one umbrella. This standard might envisage using WiFi for large volume data exchange and Bluetooth for local device configuration.


It is notable that Nordic Semiconductor, the market leader in Bluetooth Low Energy, has recently launched its first WiFi device. So, one can expect that there will be a few dual radio devices coming out soon supporting the latest generation of both technologies.


SM&E22_AD_CiE_2022-23_210Wx130H_ADVERT-Grey.qxp_19102022 19/10/2022 09:17 Page 1


Choices for system designers For system designers, it is likely to be less a question of choosing one or the other, but in many cases, more what system functions should use which wireless technology. One could make an analogy with the evolution of mobile phones – initially, they only had a connection to the cellular network,


and over time, they turned into the multi- radio devices we carry around today. IOT applications are going the same way, having started with typically a simple point to point connection from the device to something acting as a gateway. We now have many different solution architectures including multi- radio, mesh networks, long and short distance, and various other permutations. The bottom line is both technologies are adding capabilities, and this simply makes more things possible. Neither seems likely to disappear in the foreseeable future.


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