LoRaWAN has the characteristics of multi-channel access, frequency switching, adaptive rate, channel management, timing sending and receiving, node access authentication, data encryption, and roaming. In addition to the advantages of long transmission distance and low power consumption in the physical layer, it is relatively The transmission method using only the LoRa physical layer has the following advantages:
1. Compatible. Different sensor nodes from different manufacturers can access the same LoRaWAN network. The LoRaWAN protocol and the interface of the data cloud platform are unified. For application developers, it is not necessary to customize all sensors, which can shorten the R & D cycle and reduce R & D costs. Achieve fast delivery.
2. Large network capacity. Compared with point-to-point or point-to-multipoint applications based on the LoRa physical layer, LoRaWAN networks have greater data capacity through multi-channel access, frequency switching, and adaptive rates. They can access more nodes and have strong scalability, which is beneficial to application developers. Develop larger-scale applications and continuous upgrades of applications.
3． Good security. The LoRaWAN network has designed security mechanisms such as node access authentication and data encryption. These mechanisms have been reviewed by industry experts and verified by a variety of applications from various technology companies around the world. Compared with application developers' temporary agreements, the security is much higher. Provides protection for the continued security of the application.
4． Features continue to expand and upgrade. With the evolution of LoRaWAN network standards, features such as positioning, roaming, broadcasting, and multicasting can be continuously added, which is equivalent to continuously benefiting from a common technology platform.
Can realize a variety of sampling methods, such as reed switch, Hall and other pulse sampling methods and photoelectric sampling methods;
The host computer can perform valve control operations on the meter through preset commands;
When the watch is subjected to a magnetic attack, upload the data frame and collide with the attack state, close the valve. After the attack disappears, upload the data frame and open the valve;
In place detection
With switch in-position detection function, when the normally open contact is closed in place, the meter switch valve is in place, and the valve operation can be stopped immediately;
The module automatically uploads a frame table data every 6 hours;
The module is usually in the standby state, and the module can be triggered to upload real-time data and working status once;
Valve failure detection
Automatically determine whether the valve limit switch is working normally. When the limit switch fails, the valve status is abnormal, and an alarm will be displayed in the background;
Reed switch failure detection
When the sampling reed switch or Hall element fails, the meter will upload a reed switch fault prompt, and the meter is no longer measured, and the meter is normal after the fault is eliminated;
You can set various parameters such as the table address, table bottom number, and LoRaWAN key through infrared communication.