Esp8266 - at command + network transparent transmission

One .AT Instructions

ESP8266 It can be through serial port AT Command to communicate or control with other devices ( At first I thought AT Instruction is ESP8266 It's already sealed , It can be used directly , It didn't turn out to be , You need to install it yourself AT The firmware ), After installing the firmware, connect it directly with the data cable ESP8266 Open the serial port to communicate . Commonly used AT Order to see this blog ：(16 Bar message ) Get along well with ESP8266-01——AT Instruction set _Allen zhu The blog of -CSDN Blog _esp8266at Instruction set .

Two . Model is introduced

SAT Pattern ：STA The pattern is 8266 Equivalent to a terminal , You can connect other wifi The signal .

AP Pattern ：STA Equivalent to a router , Other devices can be connected to 8266 Emitted wifi The signal .

STA+AP Pattern ：8266 While acting as a terminal, it also acts as a router .

3、 ... and . Wireless transmission

Transparent transmission means transparent transmission ,ESP8266 The data received from the serial port is transmitted to the network server through transparent transmission , Other 8266, Mobile computers and other terminals that can connect to this server , You can log in to the server to view some status information , Note that this process is one-on-one , That is, one send and one receive , Instead of receiving more than one .

Four . Transmission experiment

1.TCP Server transparent transmission

Create a server ：

  Fill in the port of this machine casually , Then open the port .

1). Set up STA Pattern

AT+CWMODE=1

Correct response ：OK

2). Restart the device

AT+RST

Correct response ：

ready

WIFI CONNECTED

WIFI GOT IP

3). Connect the router

AT+CWJAP="HUAWEI Mate 30","1234567890"

Correct response ：OK

4). Connect the module to the server you just created

AT+CIPSTART="TCP","192.168.43.155",1236

Correct response ：CONNECT OK

5). Turn on transmission mode

AT+CIPMODE=1

Correct response ：OK

6). Start penetrating

AT+CIPSEND

Correct response ：OK

Here we are , It can be used through transmission

Output information on serial port

The network server can receive

At the same time, send

  The serial port can also receive

7). End passthrough

Input +++ You can launch the transparent transmission mode

8). Power on and automatically turn on the transparent transmission mode

Sending the following command will automatically enter the transparent transmission mode when powered on

AT+SAVETRANSLINK=1,"192.168.43.155",1236,"TCP"

If you want to exit automatic access through transmission , Then first exit the transparent mode , Send again “AT+SAVETRANSLINK=0 ”

2.UDP transparent transmission

  Write the host port casually , Then open the .

1). Set up STA Pattern

AT+CWMODE=1

Correct response ：OK

2). Restart the device

AT+RST

Correct response ：

ready

WIFI CONNECTED

WIFI GOT IP

3). Connect the router

AT+CWJAP="HUAWEI Mate 30","1234567890"

Correct response ：OK

4). Inquire about IP Address

AT+CIFSR

Correct response ： modular IP Address

5).AT+CIPSTART="UDP","192.168.43.155",1236,400

1236 Is the remote port ,400 Is the near end port , It's also random

Correct response ：OK

6). Turn on transmission mode

AT+CIPMODE=1

Correct response ：OK

7). Start penetrating

AT+CIPSEND

Correct response ：OK

Here we are , Transparent transmission can be used .

 

  You can see , Serial port and network server can send and receive each other .

8). End passthrough

Input +++ You can launch the transparent transmission mode

9). Power on and automatically turn on the transparent transmission mode

Sending the following command will automatically enter the transparent transmission mode when powered on

AT+SAVETRANSLINK=1,"192.168.43.155",1236,"UDP",400

  If you want to exit automatic access through transmission , Then first exit the transparent mode , Send again “AT+SAVETRANSLINK=0 ”