Esp8266 WiFi module and mobile communication

ESP8266 WIFI Module through TTL Module and mobile communication

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Preface

With the continuous development of intelligent Internet of things , More and more people choose wireless communication devices , such as WiFi、 bluetooth 、Lora、zigbee、2G Modules and other wireless communication modules of the Internet of things , Thus, the purpose of wireless control can be better achieved .

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1、 Debugging tools

1. This debugging assistant supports a full range of functions , You can download from the mobile application market by yourself .

2. Serial port debugging assistant is provided by punctual atom XCOM

2、 Module as client

When the module is the client , Then the mobile phone will be selected as the server

2.1、 Module instructions

STA  Pattern ,TCP  client   Configuration instructions 
    Instructions 					                               effect 
AT    				                      // Test instruction 
AT+CWMODE=1				                  // Set up modules  WIFI  The model is  STA  Pattern 
AT+RST					                  // Restart the module to take effect 
AT+CWJAP="xxxx","xxxxxxxxx"	              // Connect  WIFI hotspot , Route name ：xxx, password ：12345678
AT+CIPSTART="TCP","192.168.31.244",8088	  // establish  TCP  Connect to ” 192.168.1.XXX”,8088
AT+CIPMODE=1				              // Turn on transmission mode 
AT+CIPSEND				                  // Start transmitting 
+++（ No carriage return ）				              // Exit through mode 

2.2、 Module wiring

Here's the picture ：

USB-TTL modular	WiFi modular
VCC(5V)	VCC(5V)
GND	GND
TXD	RXD
RXD	TXD
IO_0	GND( The firmware )

• IO_0 This pin is used when brushing firmware , Just get to the ground , When communicating, it is suspended by default （ Don't pick up ） that will do .

2.3、 Instruction example

Pass the module through USB-TTL After the module is connected to the computer, select the serial port number , Baud rate should be selected according to the module , You can configure it with instructions later .

1. send out AT Command to test whether the module is successfully connected , Before normal communication . It should be noted here that the command is to check the enter line , Otherwise, the instruction will not fail to be sent .

2. Hair AT+CWMODE=1 Set up modules WIFI The model is STA Pattern

3. Send reset command , Prompt the firmware version information of the template after restart .

4. Connect the router network

Tips WIFI CONNECTED Indicates successful connection WiFi 了 .

5. Mobile phone establishment TCP The server , Open the software as shown in the figure below ： Click on TCP Server creation

Then click the plus sign to add a server

Fill in the name of the server , The address is fixed , It can't be modified , Any four digit port number is enough , Finally, click save .

The built server is shown in the figure below ： Then click in

6. Hair AT+CIPSTART=“TCP”,“192.168.31.244”,8088 establish TCP Connect to ” 192.168.xx.xxx”,8088, The address and port here must be consistent with the server created .

After sending, you can see the assistant prompt on your mobile phone that you are connected .
Note that the mobile phone and the module should be on the same LAN ( That is, both the mobile phone and the module are together WiFi).

2.4、 The data transfer

AT+CIPMODE=1 Turn on transmission mode
AT+CIPSEND Start transmitting

The above is the process of sending data to the serial port debugging assistant and the mobile network assistant . If the debugging passes, you can send instructions and send and receive data with the program , It can be used for communication between mobile phone and MCU development board .
Hair +++ Exit through mode , Note that there is no need to tick back to switch lines when exiting the transparent transmission mode , Otherwise, I will +++ When the data is processed .

3、 The module acts as a server

3.1. Module instructions

STA  Pattern ,TCP  The server   Configuration instructions 
    Instructions 					                               effect 
AT    				                      // test 
AT+CWMODE=1				                  // Set up modules  WIFI  The model is  STA  Pattern 
AT+RST					                  // Restart the module to take effect 
AT+CWJAP="Ryan","12345678"	              // Connect  WIFI hotspot , Route name ：Ryan, password ：12345678
AT+CIPSTART="TCP","192.168.31.244",8088	  // establish  TCP  Connect to ” 192.168.1.XXX”,8086
AT+CIPMODE=1				              // Turn on transmission mode 
AT+CIPSEND				                  // Start transmitting 
+++（ No carriage return ）				              // Exit through mode 

The process is brief …
Refer to the above process for specific steps , Just switch over .

4、 Computer network assistant communication

In addition, if you don't want to use your mobile phone , You can use the network debugging assistant to test on the computer , The steps are the same , It's all the process of establishing a server , Special attention should be paid to that the network should be in the same LAN . No tests here …

5、 Firmware burning

Based on the previous use , Before burning firmware , notes It means I0_0 Need to be stay model block On electric And front even Pick up To GND, however after hit open solid Pieces of burn Write soft Pieces of ESPFlashDownloadTool.exe . Click on START, Then power on the module again , You can automatically burn .

When I double-click this software , There was no reaction , Then copy the whole folder to the desktop and you can open it normally , It is estimated that the Chinese path is too long to open .

Add these two firmware in turn , route 【 The punctual atoms 】WIFI modular ATK-ESP8266 Information \6,ESP8266 Related information \ Firmware burning and description \ Atomic cloud firmware v2.4

Select the relevant parameters , Pay attention to the selection of serial port number , And then click START.

Power up the module again , Wait for the burning to finish

The final prompt indicates that the brush is finished .

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6、 summary

It's on it WiFi Some simple test procedures of the module , It's fun , Due to limited time , Just tested STA Mode , There is no time to test AP The model , If you can spare time later , Go play again .

8266WiFi The overall use of the module is relatively simple , As long as the instruction is sent correctly, it can work normally in the corresponding mode .