The maximum distance covered by a general wireless router is usually 100 meters to 300 meters. However, after testing, the wireless signal distance of many wireless 4G routers is difficult to reach the theoretical value. So what are the factors that affect the coverage of industrial 4G routers? Industrial 4G routers How to adjust coverage?

Industrial 4G routers are used for interactive transmission of remote big data, and can be used in a variety of complex environments that are subject to high temperature and severe cold, providing reliable networking and stable communication for unattended systems. So what fields are industrial 4G routers generally used in?

Compared with GPRS, the biggest feature of NB-IoT is low power consumption. In addition to the relatively low transmission rate of NB-IoT itself, NB-IoT introduces eDRX power saving technology and PSM power saving mode, which is also the main reason for power saving.

NB-IoT is a new narrowband cellular communication LPWAN (Low Power Wide Area Network) technology that can help us solve this problem.

The serial server is a serial port to Ethernet module plus a shell, which has the function of electromagnetic isolation.

The serial port server provides the serial port to network function, which can convert the RS-232/485/422 serial port into a TCP/IP network interface, and realize two-way transparent data transmission between the RS-232/485/422 serial port and the TCP/IP network interface. The serial device can immediately have the function of TCP/IP network interface, connect the network for data communication, a···

The LoRa module has an open transmission distance of more than 5000 meters, which can solve the problem that low power consumption and long distance cannot have both. It is suitable for projects that require wireless meter reading and industrial control.

LoRa mainly operates in free frequency bands around the world (ie, unlicensed frequency bands), including 433, 868, 915 MHz, etc. LoRa network is mainly composed of terminal (built-in LoRa module), gateway (or base station), server and cloud.

Many people only know that modem is an indispensable thing for computer to access the Internet. Since routers are often used together with "modem", people confuse them. They don't know the difference between modem and router. In fact, modem is It is completely different from the router. Today, the editor will introduce to you in detail what is a modem? What is the difference between a modem and a ···

NB-IoT refers to Narrow Band-Internet of Things technology. Focusing on the Low Power Wide Coverage (LPWA) Internet of Things (IoT) market, NB-IOT is an emerging technology that can be widely used around the world. NB-IOT uses the license frequency band, and can be deployed in three ways: in-band, guard band, or independent carrier to coexist with the existing network.