Zigbee is a complex networking protocol based on the 802.15.4 physical layer protocol, supporting self-organizing networks, multipoint relays, and realizing mesh topology. With its low power consumption characteristics, the devices between the networks must be separated Perform their duties and work together effectively.
Zigbee is the name of the protocol alliance. Its advantage lies in the self-organizing network, that is, the networking you call, the radio frequency is only the hardware foundation that supports it.
So what is the difference between ZigBee's networking method and the usual RF chip networking method? The difference is big. Let’s look at the zigbee networking first, which is to use the zigbee chip as an ordinary radio frequency chip. In fact, a solution like this is not the original intention of zigbee at all, and it does not reflect the advantages of zigbee at all. The focus of using zigbee is the realization of its ultra-low power consumption and the powerful networking capability.
Why is zigbee? Use ordinary radio frequency module, the cost is low, buy a ready-made 150M or 300M radio frequency module, only about 40 yuan, if you have the ability to solder, it will be cheaper, using zigbee development, just a chip is about 5 dollars , Does not include other peripheral equipment; use the ready-made RF module, easy to develop, directly connect to the TxD/RxD pin, you can use it, if you use the zigbee chip, the protocol stack alone has 40K code, and you need Writing a profile requires a long development cycle and high risks.
Why do we use zigbee? Where is its advantage?Zigbee can achieve multi-network coexistence
We need to use 232 to transmit data or commands somewhere. In general, we use 232/485 converters to achieve this. But what if wiring is not allowed in the workplace? The simplest solution is to go wirelessly. We build a 232-" wireless converter and then use the wireless-" 232 transparent converter to replace 485.
Zigbee can achieve ultra-low power consumption
The original goal of zigbee design is low power consumption. It is required to achieve a dry battery life of more than half a year, and now the maximum can be 5-10 years (calculated, the battery quality requirements are relatively high, and it is not bad for 5 years. Easy), the zigbee protocol provides this kind of function, but it only provides this kind of ability, and the user needs to realize this ability.
Zigbee can realize high-reliability self-organizing network
Zigbee has a reliable sending and receiving handshake mechanism, which reliably guarantees the sending and receiving of data. In addition, Zigbee uses an AES128-bit key to ensure the security of data sending.
Therefore, if we need to use zigbee instead of ordinary radio frequency, then it must be that ordinary radio frequency cannot meet the requirements, which forces us to choose zigbee. Once we choose zigbee, we naturally hope to achieve one of our goals. Below I will discuss how to do it.
Wuxi Lerin New Energy Technology Co.,Ltd. , https://www.lerin-tech.com