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ZigBee
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ZigBee is a Wireless Personal Area Network (WPAN) specification based upon the IEEE 802.15.4 standard. Zigbee is often employed for wireless mesh network applications, where numerous devices within a geographic area communicate with the neighbors, which pass the message along to its neighbors, and so forth, to create a distributed network. Smart Power Meters, installed at business and residences, have begun using ZigBee to communicate power usage and billing data.
ZigBee transmitters are unlicensed devices that operate in bands typically used by other unlicensed devices, such as Wi-Fi, Bluetooth, and cordless phones.
According to the ZigBee Alliance, "after 10 years and millions of implementations every year, ZigBee standards prove you can rely on the widest variety of smart and easy-to-use products for just about anywhere you work, live or play. Our innovative standards are designed to let product manufacturers help their customers create their own Internet of Things and M2M wireless sensor networks to gain greater control of, and even improve, everyday activities."
ZigBee supports data rates of up to 250 kbps using O-QPSK modulation in the 2.4 GHz band (worldwide); 40 kbps using BPSK in the 915 MHz band (North America and Australia only); and 20 kbps using BPSK in the 868 MHz band (Europe). Unlike Bluetooth, ZigBee does not use frequency hopping.
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Channelized Frequencies |
| Frequency | Bandwidth | Channel | Use | Service | Table |
| 868.3 MHz | 600 kHz | 0 | ZigBee (Europe) | - | - |
| 906 MHz | 1.2 MHz | 1 | ZigBee (North America & Australia) | - | - |
| 908 MHz | 1.2 MHz | 2 | ZigBee (North America & Australia) | - | - |
| 910 MHz | 1.2 MHz | 3 | ZigBee (North America & Australia) | - | - |
| 912 MHz | 1.2 MHz | 4 | ZigBee (North America & Australia) | - | - |
| 914 MHz | 1.2 MHz | 5 | ZigBee (North America & Australia) | - | - |
| 916 MHz | 1.2 MHz | 6 | ZigBee (North America & Australia) | - | - |
| 918 MHz | 1.2 MHz | 7 | ZigBee (North America & Australia) | - | - |
| 920 MHz | 1.2 MHz | 8 | ZigBee (North America & Australia) | - | - |
| 922 MHz | 1.2 MHz | 9 | ZigBee (North America & Australia) | - | - |
| 924 MHz | 1.2 MHz | 10 | ZigBee (North America & Australia) | - | - |
| 2405 MHz | 2 MHz | 11 | ZigBee (worldwide) | - | - |
| 2410 MHz | 2 MHz | 12 | ZigBee (worldwide) | - | - |
| 2415 MHz | 2 MHz | 13 | ZigBee (worldwide) | - | - |
| 2420 MHz | 2 MHz | 14 | ZigBee (worldwide) | - | - |
| 2425 MHz | 2 MHz | 15 | ZigBee (worldwide) | - | - |
| 2430 MHz | 2 MHz | 16 | ZigBee (worldwide) | - | - |
| 2435 MHz | 2 MHz | 17 | ZigBee (worldwide) | - | - |
| 2440 MHz | 2 MHz | 18 | ZigBee (worldwide) | - | - |
| 2445 MHz | 2 MHz | 19 | ZigBee (worldwide) | - | - |
| 2450 MHz | 2 MHz | 20 | ZigBee (worldwide) | - | - |
| 2455 MHz | 2 MHz | 21 | ZigBee (worldwide) | - | - |
| 2460 MHz | 2 MHz | 22 | ZigBee (worldwide) | - | - |
| 2465 MHz | 2 MHz | 23 | ZigBee (worldwide) | - | - |
| 2470 MHz | 2 MHz | 24 | ZigBee (worldwide) | - | - |
| 2475 MHz | 2 MHz | 25 | ZigBee (worldwide) | - | - |
| 2480 MHz | 2 MHz | 26 | ZigBee (worldwide) | - | - |
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