What is ZDO in ZigBee?
ZDO is the local-state machine that controls the state of the ZigBee node on and off the network. When a node boots up, it does not necessarily join a network right away. It may go into low-power mode, and wait for a button-press, or some other event that causes the node to decide it needs to network.
Which is not a functionality of ZigBee device objects?
Answer: b. interfacing and control services.
What is full form of ZDO?
ZDO
| Acronym | Definition |
|---|---|
| ZDO | Zigbee Device Object |
| ZDO | Zero Downtime Option |
| ZDO | Zero Differential Overlap |
| ZDO | Zoning and Development Ordinance |
What is ZigBee profile?
ZigBee profiles are used in cases for which the ZigBee technology is intended. For example, the ZigBee Alliance has defined a profile for home automation, smart energy management, building automation, and toys. There are two types of application profiles: public and vendor-specific.
What is ZigBee topology?
The Zigbee Mesh Topology is also a Peer-to-Peer Topology and is an extension to the Cluster Tree Topology. The End Devices that are configured as FFD can directly communicate with other FFD Devices (either Routers or End Devices).
Which modulation is used in ZigBee?
The 2.4 GHz band, in which ZigBee transceivers are most commonly deployed, uses the OQPSK (offset quadrature phase-shift keying) modulation stream.
What are the features of ZigBee?
Zigbee protocol features include:
- Support for multiple network topologies such as point-to-point,
- Low duty cycle – provides long battery life.
- Low latency.
- Direct Sequence Spread Spectrum (DSSS)
- Up to 65,000 nodes per network.
- 128-bit AES encryption for secure data connections.
How do I identify my ZigBee device?
These IDs range from 0x0000 to 0xFFFF. The IDs in the table are used in Home Automation Profile of zigbee….Zigbee Device IDs table.
| Zigbee Device Group | Zigbee Device IDs | Description |
|---|---|---|
| Generic | 0x0000 | ON/OFF Switch |
| 0x0001 | Level Control Switch | |
| 0x0002 | ON/OFF Output | |
| 0x0003 | Level Controllable Output |
What are ZigBee components?
System structure of ZigBee technology consists of three main components: ZigBee coordinator, Router, and end device. Every ZigBee network has to consist one coordinator which acts as a bridge of network.
Which of the following topologies are supported by ZigBee?
ZigBee supports three types of topologies: star topology, peer-to-peer topology, and cluster tree (see Figure 20.5). Figure 20.5. ZigBee topologies. In the star topology, communication is established between devices and a single central controller, called the PAN coordinator.
What is ZigBee coordinator?
ZigBee Coordinators (ZCs) are the only ZigBee device-type that can form (as opposed to join) a network. In this small two-node network, the light, which is probably mains powered, is a natural choice for the ZigBee Coordinator.
What are the sections in ZigBee architecture?
The ZigBee protocol architecture is divided into three sections, as follows: IEEE 802.15. 4, which consists of the MAC and physical layers. ZigBee layers, which consist of the network layer, the ZigBee device object (ZDO), the application sublayer, and security management.