(The ZigBee warehouse is built on the basis of the IEEE802.15.4 standard, which defines the MAC and PHY layers of the protocol. ZigBee devices should include the PHY and MAC layers of IEEE802.15.4 (the standard that defines RF radio frequencies and communication with adjacent devices), as well as the ZigBee warehouse layers: network layer (NWK), usage layer, and security service provider layer.)
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