By Fred Eady
On account that its fresh advent, the ZigBee protocol has created a major quantity of buzz in venues from journal covers to trade exhibition flooring to water coolers. Its promise of offering an easier, more affordable, extra power-efficient WPAN (Wireless own sector community) replacement to WiFi and Bluetooth has unfolded new info assortment chances in program components from commercial controls to scientific units to intruder alarms. but, regardless of this common curiosity, there's nonetheless little info on hand that is going past detailing the spec itself. lacking from the present ZigBee lexicon is sensible, application-oriented tips from a professional, particularly geared to help engineers in imposing this new expertise. input revered fashion designer and well known columnist Fred Eady! along with his new publication, he presents the single finished how-to ZigBee consultant available.
- The in basic terms one-stop Zigbee source on hand- from fundamentals to sniffers to specs
- 7 easy-to-assemble ZigBee tasks let the reader to stick with along...hands-on!
- Working and software program examples integrated in each chapter
Read Online or Download Hands-On ZigBee: Implementing 802.15.4 with Microcontrollers (Embedded Technology) PDF
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Extra info for Hands-On ZigBee: Implementing 802.15.4 with Microcontrollers (Embedded Technology)
It doesn't hurt to make sure we understand (and are speaking correctly at the cocktail party) by doing the simple math. 1 tells us that we aren't done with symbols. However, at least you know what a symbol is. 4 specification, you'll find that your knowledge of symbols gained here will come in real handy. Let's get back in the truck and get on the road so we can continue our look at the MAC PIB attributes. 1 is the macAssociationPermit bit. The macAssociationPermit is a Boolean attribute, which means it can take on a representative TRUE or FALSE condition.
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 ............
The concept is more important than the detail behind the code. So, I'll do a bit of paraphrasing when it's appropriate. 4 transceiver, the packet is received by the PHY and the MRF24J40 informs the PIC microcontroller of its arrival by issuing a hardware interrupt, which pulls the PSDU from the PHY FIFO and stores it into a buffer area that has been allocated in the PIC microcontroller's SRAM. The incoming PSDU must be processed quickly and we already know that the buffered PSDU needs to be passed to the MAC's MPDU area.