By Fred Eady
When you consider that its fresh creation, the ZigBee protocol has created a major quantity of buzz in venues from journal covers to trade event flooring to water coolers. Its promise of delivering a less complicated, more affordable, extra power-efficient WPAN (Wireless own quarter community) substitute to WiFi and Bluetooth has spread out new information assortment probabilities in software components from business controls to scientific units to intruder alarms. but, regardless of this frequent curiosity, there's nonetheless little info to be had that is going past detailing the spec itself. lacking from the present ZigBee lexicon is sensible, application-oriented information from a professional, particularly geared to help engineers in imposing this new expertise. input revered dressmaker and well known columnist Fred Eady! along with his new publication, he offers the one complete how-to ZigBee consultant on hand. ·The purely one-stop Zigbee source to be had- from fundamentals to sniffers to specifications ·7 easy-to-assemble ZigBee tasks enable the reader to stick with along...hands-on! ·Working and software program examples integrated in each bankruptcy
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Extra info for Hands-On ZigBee: Implementing 802.15.4 with Microcontrollers (Embedded Technology)
Frame 000 . • . • . 0 . 0 = Frame . . . . Type: = Security 0 • • • Pending- . . . , . .... 0 00 . . . = Intra . . . . . . . . . . PAN: Not = Destination . . Acknowledgment within the PAN = Reserved 0 ....... 00 . . . . . 00 data required Addressing and present • more Request: identi~er I0 (0x0000) Disabled No = Acknowledgment . not . Beacon Enabled: . PAN ~eld are not (0x0000) = Reserved . Mode: address = Source . Addressing contains a Mode: 16-bit Address short ~eld address (0x0002) Sequence Number : 152 Source PAN Identi~er: Source MAC Address: 0x0744 0x0000 Payload Superframe Speci~cation: 0xcfff = Beacon ............
FORCE TRX_OFF 0x03 The transceiver is to be switched off. IDLE 0 x 04 The CCA attempt is to be switched off. INVALID PARAMETER 0x05 A SET/GET request was issued with a parameter in the primitive that is out of the valid range. RX ON 0x06 The transceiver is in or is to be configured into the receiver enabled state. SUCCESS 0x07 A SET/GET, an ED operation, or a transceiver state change was successful. 1 Status values and descriptions. Don't get too excited about keeping these in your head. These values are normally enumerated in the ZigBee or IEEE802.
If you're wondering how the status values within the primitives are conveyed, they aren't really words but a set of predefined enumerated values. 1. ili iiiiii !!! iiii BUSY 0 x 00 The CCA attempt has detected a busy channel. BUSY RX 0x01 The transceiver is asked to change its state while receiving. BUSY TX 0x02 The transceiver is asked to change its state while transmitting. , FORCE TRX_OFF 0x03 The transceiver is to be switched off. IDLE 0 x 04 The CCA attempt is to be switched off. INVALID PARAMETER 0x05 A SET/GET request was issued with a parameter in the primitive that is out of the valid range.