Which technology does WirelessHART leverage for its PHY/MAC layer?

WirelessHART leverages IEEE 802.15.4 for its PHY (Physical Layer) and MAC (Media Access Control Layer). This particular standard provides the foundational aspects necessary for creating low-power and reliable wireless communication, which is essential in industrial automation settings.

IEEE 802.15.4 is designed for low-data-rate wireless personal area networks (WPANs) and operates in various frequency bands, including 2.4 GHz. This allows for robust signal transmission in diverse industrial environments, where interference can be a concern. By using this standard, WirelessHART effectively supports the demands of process automation, enabling secure and efficient connections among numerous devices.

In contrast, the other technologies mentioned—like Wi-Fi 802.11, Bluetooth Low Energy, and Z-Wave—are optimized for different use cases. Wi-Fi is more suited for higher data rates and broader coverage, Bluetooth Low Energy focuses on short-range applications, and Z-Wave caters to smart home devices. While these technologies are valuable in their respective areas, they do not align with the specific needs and requirements of WirelessHART's implementation in industrial settings.