Experiment of connecting mobile phone hotspot based on Arduino and esp8266 (successful)

One 、 Experiment introduction

The last blog introduced ESP8266 Of Arduino Environment building , Code downloaded successfully , It means that the environment is set up ,ESP8266 The above light can flash according to the code modification parameters

This article blog Introduce the second 2 An experiment ： We go through ESP8266 Connect phone hotspot

1、 The serial port of the computer displays the connection status and ESP Of IP

2、 Open the hotspot interface on the mobile phone to view the devices connected to the hotspot , It shows that ESP Connection state of （ This has nothing to do with the program , It is only used to check the connection status ）

The hardware used ：

1、Arduino Development board

2、ESP8266 Development board

3、 cable

  be based on ESP8266 Of Arduino Development environment here you can check my last article blog

Two 、 Common problems encountered during the experiment

The mistake I encountered was , This experiment wants to ESP Connect to Arduino, And then through Arduino Download the program to the development board

Later, I found that it seemed impossible , At least not yet

The method I am using now is ：

1、ESP8266 Connect to the computer through a data cable , port COM7

2、Arduino Connect to the computer through a data cable , port COM6

3、Arduino IDE Open the code （ Share later ）, Choose the development board option , choice COM7（ESP8266 Development board port , instead of Arduino port ）

4、 Keep holding ESP98266 Of FLASH Key , Click RST, The blue light on the development board lights up , This process keeps pressing FLASH, Then click download code , Until the percentage reaches 100%, After completely stopping , Release FLASH, At this time, the program is downloaded successfully

5、 Turn on the phone hotspot 、 Open the serial port , The connection status and ESP Of IP, You can also check the hotspot settings of mobile phones ESP Connection state of

The download method of my current program is , hold ESP and Arduino Connect the computer with data cable , Then download the program , Instead of the usual ESP As a sensor module , Connect at Arduino After the , Connect Arduino Serial port , Then download the code

3、 ... and 、 Code

Share the code first ：

//  test esp8266 Connect WiFi
#include <ESP8266WiFi.h>
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  WiFi.begin("wyf", "1899*******");     // Set it as your own hotspot or WIFI Name and password for 
  Serial.println();
  Serial.print("Connecting");
  while (WiFi.status() != WL_CONNECTED)
  {
    delay(500);
    Serial.print(".");
  }
  Serial.println();

  Serial.print("Connected, IP address: ");
  Serial.println(WiFi.localIP());
}

void loop() {
}

Reference resources ：

ESP8266 Use guide ( 3、 ... and )——Arduino Development

Four 、 experimental result

Now let me introduce my experimental results , Share with you through video

1、 Because I restarted ESP8266 modular , Test connection status , Pressed RST Key

2、 The computer Arduino IDE Serial port display , Print the connection status and... Multiple times ESP Of IP：192.168.15.227, For serial port ESP A serial port

3、 The mobile terminal shows the connection , To break off , Reconnect , Show ESP Of ID：ESP0D6F56

ESP8266 Connect mobile hotspot experiment

5、 ... and 、 The current experimental bottleneck

1、 Now the two development boards are connected to the download program respectively

2、 This experiment only uses connection , Data transmission is not involved , therefore ,ESP As long as the power supply is realized WIFI The connection of , No use of Arduino Data processing

hold ESP Disconnect the data cable from the development board , Connected by DuPont line Arduino

ESP                Arduino

3v                       3.3v

G                        Grounding

EN                      （ This experiment does not involve ）

TX                      （ This experiment does not involve ）

RX                      （ This experiment does not involve ）

Or the Arduino power failure , Only power on ESP Development board ,WIFI You can still connect

The current experimental results , If connected by DuPont line ESP and Arduino, open Arduino IDE Serial port , Serial port data is not displayed ESP Connection state of , In the state of blank without data , and WIFI as long as ESP You can connect to the mobile hotspot when you are powered on

Among them, try

ESP                Arduino

3v                       3.3v

G                        Grounding

EN                      （ This experiment does not involve ） Connect 3,3V Or disconnect

TX                      （ This experiment does not involve ） even 0RX perhaps 1TX

RX                      （ This experiment does not involve ） even 1TX perhaps 0RX

You will find that the serial port has no specific connection status

therefore , Prepare for subsequent experiments to continue to understand ESP and Arduino Connection mode and operation mechanism

6、 ... and 、 Assumption of subsequent experiments

It will continue in the future Arduino Of ESP8266 Do a series of experiments

1、 utilize ESP Transmit data and save data through the network , Cloud platform may be used

2、 adopt WIFI Realize remote communication

7、 ... and 、 summary

OK, After the experiment , Record your experiment , Share it out , I hope it helped you , Let's learn and share happily , Thank you for browsing .