Estimates state Zigbee Alliance technologies will account for 3.8 billion (85%) of the 4.5 billion IEEE 802.15.4 units projected to ship by 2023. “ON World has closely followed the IEEE 802.15.4 category for the past 15 years and has tracked Zigbee technology since before its flagship specification was ratified in December 2004,” said Mareca Hatler, Principal Analyst at ON World.

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