The following is the total knowledge of the WiFi module compiled by the editor of Jin Broadcom. I hope it will be helpful to everyone!

1. What is the SDK of the WiFi module?

SDK is the English abbreviation of the software development kit (full name: Software Development Kit) of the WiFi module. It is generally a collection of development tools used by some software engineers to build application software for specific software packages, software frameworks, hardware platforms, operating systems .

2. What is the driver of the WiFi module?

The driver is a small piece of code added to the operating system that contains information about the hardware device. With this information, the computer can communicate with the device. The driver is a configuration file written by the hardware manufacturer according to the operating system. It can be said that without the driver, the hardware in the computer cannot work.

For the WiFi module, this hardware can be the WiFi module of the slave device. Currently, the WiFi module of the slave device of SKYLAB can provide drivers. The supported systems are: Window, Linux and Android.

3. What is the network port of the WiFi module?

The network port of the WiFi module should be viewed from two aspects,

(1) On the hardware:

The network interface refers to various interfaces of network equipment, and the network interfaces we are using today are all Ethernet interfaces.

Common Ethernet interface types include RJ-45 interface, RJ-11 interface, SC fiber interface, FDDI interface, AUI interface, BNC interface, and Console interface.

(2) On the software:

The network port is divided into: WAN port, LAN port

The WAN port is used to connect to the external network (public network), or to connect the equipment of the broadband operator.

The LAN ports (1, 2, 3, 4) are used to connect devices in the intranet (local area network), and are mainly used to connect devices such as computers, switches, and printers.

4. What is the IP address of the WiFi module?

IP is the abbreviation of English Internet Protocol, which means "protocol of interconnection between networks", which is a protocol designed for computer networks to communicate with each other.

The IP address is a 32-bit binary number, which is usually divided into 4 "8-bit binary numbers" (that is, 4 bytes).

5. What is routing?

Routing refers to the process in which a router receives a data packet from one interface, directs it according to the destination address of the data packet, and forwards it to another interface.

The routing algorithm populates the routing table based on a lot of information. The destination / next hop address pair tells the router that the best way to reach this destination is to send the packet to the router representing the "next hop". When the router receives a packet, it checks its destination address and tries to compare this address with the "Jump" connection.

6. What is the default gateway?

The IP address of a directly reachable router. Configure the default gateway to create a default path in the IP routing table. A host can have multiple gateways. The default gateway means that if a host cannot find an available gateway, it will send the data packet to the default designated gateway, which will process the data packet.

For example, the default gateway of SKYLAB's WiFi module is generally 10.10.10.254. Enter 10.10.10.254 in the address bar of the browser to enter the configuration page of the WiFi module. On the configuration page, you can set the working mode and language of the WiFi module. And change. The WiFi module has two default gateways in Apclient working mode.

7. What is a local area network?

Local area network refers to a group of computers interconnected by multiple computers in a certain area. The local area network can realize functions such as file management, application software sharing, printer sharing, schedule within the work group, e-mail and fax communication services. The local area network is closed. It can be composed of two computers in the office or thousands of computers in a company.

8. What is DHCP?

DHCP (Dynamic Host Configuration Protocol) is a network protocol of a local area network and works using the UDP protocol. Automatically assign IP addresses to internal networks or network service providers, and serve as a means for central management of all computers to users or internal network administrators. For example, all the SKYLAB WiFi modules can support the DHCP server.

According to the DHCP address pool, each device connected to the module is automatically assigned an IP address.

9. TCP / UDP data transmission protocol

TCP (Transmission Control Protocol) is a connection-oriented, reliable, and transport layer communication protocol based on byte stream.

The full name of the UDP protocol is the user datagram protocol. In the network, it is used to process data packets like the TCP protocol. It is a connectionless protocol.