On July 12, 2018, this public account discussed LoRa technology and mentioned that in today’s internet era, new technologies are emerging one after another!Zigbee is also a product of the network era, representing a new wireless communication technology, whose technical characteristics can be summarized as “one close and four lows”—a bidirectional wireless communication technology, specifically as follows:
One Close: Short Range
Four Lows: Low Complexity, Low Power Consumption, Low Data Rate, Low Cost
The technical characteristics of LoRa are that it can effectively achieve long-distance, low-power wireless communication transmission. Meanwhile, the key points of Zigbee can also be represented in a table.
Table 1: Key Points of Zigbee Technology
|
Key Point |
Description |
|
Definition |
A bidirectional wireless communication technology characterized by short range, low complexity, low power consumption, low data rate, and low cost. |
|
Features |
1) Low Power Consumption: The transmission power is only 1mW, and it employs a sleep mode; 2) Low Data Rate: Maximum transmission rates of 250kbit/s (2.4GHz), 20kbit/s (868MHz), and 40kbit/s (915MHz); 3) Low Cost: The cost of a ZigBee module is only a few dollars, and its protocol is royalty-free; 4) Safe and Reliable: Based on cyclic redundancy check (CRC), data packet integrity checks, and collision avoidance strategies, it is safe and reliable. 5) Large Network Capacity: Up to 100 ZigBee networks can coexist in one area, accommodating up to 254 devices and 100 master devices; 6) Short Latency: Device search latency is 30ms, wake-up activation latency is 15ms, and active device channel access latency is 15ms. |
|
Operating Frequency |
Operates in three frequency bands: 2.4GHz (global), 868MHz (Europe), and 915MHz (USA) |
|
Zigbee Alliance |
The ZigBee Alliance is a non-profit organization composed of internationally renowned semiconductor companies, technology research and development units, and end users. |
|
Network Protocol |
ZigBee standards are based on IEEE802.15.4‘s physical layer, MAC layer, and data link layer, with the standard released in May 2003. In 2009, Zigbee adopted the IETF’s IPv6 6Lowpan standard. |
|
Topology Structure |
Star Network Structure |
|
Operation |
1) The LoRa gateway aggregates data, connecting terminal devices to cloud servers; 2) The gateway connects to the server via TCP/IP; 3) Under normal circumstances, battery-powered nodes are in sleep mode, waking up to send data when needed. |
|
Application Scenarios |
Wireless data terminals for the Internet of Things, used in smart grids, smart buildings, smart homes, etc. |
Zigbee has already seen numerous engineering applications in our country, with relevant organizations promoting the popularization and application of this technology.