基于Arduino的宠物管理系统传感器设计（仅硬件部分）

• 萌宠菠菠乐园
• 2024-11-06 12:54

目录

一、系统硬件设计系统硬件设计

1.1所需硬件

1.2接线表

二、程序模块设计

2.1温湿度检测模块

2.2气体检测模块（氨气检测）

2.3水位检测模块

2.3压力检测模块

2.4灰尘检测模块

2.5LCD展示模块

2.6Wi-Fi模块（重点）

三、完整代码及技术分析（主要为WiFi模块）

3.1完整代码：

3.2技术分析：（建议边使用串口调试助手边编写AT命令代码）

3.2.1本次实验使用非透传模式：

3.2.3透传模式：（个人认为这个比较丝滑）

四、总结

1、postData的问题：

2、WiFi模块和LCD模块

一、系统硬件设计系统硬件设计

1.1所需硬件

①Arduino UNO板*1

②温湿度传感器DHT11*1、粉尘传感器（GP2Y10）*1、气体传感器（MQ135）*1、水位传感器（Water Sensor）*1、压力传感器（HX7111）*1

③Wi-Fi模块（esp8266）*1

④LCD显示屏（ST7735）*1

⑤电容*1、电阻*1、面包板*3

⑥杜邦线若干

1.2接线表

温湿度传感器

Arduino UNO

正极

3.3V

负极

GND

S（数据口）

4（数字接口）

气体传感器（MQ135）

Arduino UNO

正极

5V

负极

GND

A0

A0（模拟接口）

水位传感器

Arduino UNO

正极

5V

负极

GND

S

A2

压力传感器

Arduino UNO

VCC

5V

GND

GND

DT

7（数字接口）

SCK

6（数字接口）

灰尘传感器（接线从左往右）

Arduino UNO

V-LED

5V

LED-GND

GND

LED

5（数字接口）

S-GND

GND

VO

A1（模拟接口）

VCC

5V

显示屏（ST7735）

Arduino UNO

VDD

5V

GND

GND

SCK

13（数字接口）

SDA

11（数字接口）

CS

10（数字接口）

DC

9（数字接口）

RST

8（数字接口）

二、程序模块设计

2.1温湿度检测模块

float temperature = 0;

float humidity = 0;

  temperature = dht.readTemperature();

  humidity = dht.readHumidity();      

bool dhtStatus = !(isnan(temperature) || isnan(humidity));

  sensorStatus += dhtStatus ? "1" : "0";

if(!dhtStatus)

  {

   temperature = 0;

   humidity = 0;

  }

分析：使用库文件（DHT.H）,创建dht对象进行获取温湿度，最后判断温湿度是否能读取，根据这个设置好温湿度传感器的运行状态。

2.2气体检测模块（氨气检测）

int gasSensorValue = analogRead(gasSensorPin);  

float resistance = (1023.0 - gasSensorValue) * 10000 / gasSensorValue;

float compensatedResistance = compensateResistance(resistance, temperature, humidity);

float ammoniaConcentration = convertResistanceToConcentration(compensatedResistance);  

bool gasStatus = (gasSensorValue >= 0 && gasSensorValue <= 80);

  sensorStatus += gasStatus ? "1" : "0";

if(!gasStatus)

  {

    ammoniaConcentration = 0;

  }

float compensateResistance(float resistance, float temperature, float humidity) {

float compensatedResistance = resistance * (1 + temperature / 100.0) * (1 - humidity / 200.0);

return compensatedResistance;

}

float convertResistanceToConcentration(float compensatedResistance) {

float concentration = 100 / (compensatedResistance / 20000.0 + 1);

return concentration;

}

分析：不需要使用额外的库，直接获取模拟引脚的值，再根据当前的温湿度来补偿电阻值，根据电阻值转换为氨气的浓度。根据气体传感器未正常运行的模拟值来设置传感器的运行状态。

2.3水位检测模块

int waterSensorValue = analogRead(waterSensorPin);

int waterLevel = map(waterSensorValue, 0,670, 0, 100);

bool waterStatus = (waterSensorValue >= 0 && waterSensorValue <= 100)||(waterSensorValue >= 110 && waterSensorValue <= 1023);

  sensorStatus += waterStatus ? "1" : "0";

if(!waterStatus)

  {

    waterLevel = 0;

  }

分析：不需要使用额外的库，根据模拟引脚的值获取值，并且根据实际情况将值映射为0-100的值。再根据模拟数字来判断传感器的运行状态。

2.3压力检测模块

HX711 scale;

float tareWeight = 0;

float calibration_factor = 405.0;

  scale.begin(HX711_DT, HX711_SCK);  

  tareWeight = scale.read_average(20);

float actualWeight = 658.0;

float detectedWeight = 645.0;

  calibration_factor = calibration_factor * (detectedWeight / actualWeight);  

float rawValue = scale.read_average(10);

float netWeight = (rawValue - tareWeight) / calibration_factor;

bool scaleStatus = (rawValue != 0);

  sensorStatus += scaleStatus ? "1" : "0";

if(!scaleStatus)

  {

    netWeight = 0;

  }

分析：先获取新的校准因子，然后调用HX711 库来获取当前食物的重量，通过读取的状态来获取传感器运行状态。

2.4灰尘检测模块

digitalWrite(ledPower,LOW);            

delayMicroseconds(samplingTime);      

  voMeasured = analogRead(measurePin);  

delayMicroseconds(deltaTime);

digitalWrite(ledPower,HIGH);          

delayMicroseconds(sleepTime);          

  calcVoltage = voMeasured * (5.0/1024.0);

  pmTwoFiveDensity =170 * calcVoltage;  

bool pmStatus = (voMeasured >= 0 && voMeasured <= 90)||(voMeasured >= 120 && voMeasured <= 1023);

  sensorStatus += pmStatus ? "1" : "0";

if(!pmStatus)

  {

    pmTwoFiveDensity = 0;

  }

分析：使用夏普GP2Y10测量猫笼的环境清洁度的值，然后根据断开后的传感器的模拟值来设置传感器的运行状态。

2.5LCD展示模块

stup：

  tft.initR(INITR_GREENTAB);

  tft.fillScreen(ST7735_BLACK);

loop：

  tft.fillScreen(ST7735_BLACK);

  tft.setTextColor(ST7735_WHITE);

  tft.setCursor(2, 10);

  tft.print("TempStatus: ");

  tft.print(dhtStatus ? "OK" : "NO");

  tft.setCursor(2, 20);

  tft.print("Temp: ");

  tft.print(temperature);

  tft.print(" C ");

  tft.setCursor(2, 30);

  tft.print("HumidityStatus: ");

  tft.print(dhtStatus ? "OK" : "NO");

  tft.setCursor(2, 40);

  tft.print("Humidity: ");

  tft.print(humidity);

  tft.print(" % ");

  tft.setCursor(2, 50);

  tft.print("pmStatus: ");

  tft.print(pmStatus ? "OK" : "NO");

  tft.setCursor(2, 60);

  tft.print("PM2.5: ");

  tft.print(pmTwoFiveDensity);

  tft.print(" ug/m3 ");

  tft.setCursor(2, 70);

  tft.print("WaterStatus: ");

  tft.print(waterStatus ? "OK" : "NO");

  tft.setCursor(2, 80);

  tft.print("Water Level: ");

  tft.print(waterLevel);

  tft.print(" % ");

  tft.setCursor(2, 90);

  tft.print("AmmoniaStatus: ");

  tft.print(gasStatus ? "OK" : "NO");

  tft.setCursor(2, 100);

  tft.print("Ammonia: ");

  tft.print(ammoniaConcentration);

  tft.print(" ppm ");

  tft.setCursor(2, 110);

  tft.print("WeightStatus: ");

  tft.print(scaleStatus ? "OK" : "NO");

  tft.setCursor(2, 120);

  tft.print("Weight: ");

  tft.print(netWeight, 1);

  tft.print(" g ");

  tft.setCursor(2, 130);

  tft.print("Status: ");

  tft.print(sensorStatus);

delay(2000);

分析：先初始化 ST7735 显示屏，设置背景为黑色，然后在loop函数里面设置好显示位置及大小将传感器状态及数据显示出来。

2.6Wi-Fi模块（重点）

可以先把esp8266插到usb的调试器上使用串口调试助手来检测

void connectToWiFi()

{

bool wifiConnected = false;

  Serial.println("AT+CWJAP="" + ssid + "","" + password + """ + "rn");

  espSerial.println("AT+CWMODE=1");

while (!wifiConnected)

  {

    espSerial.println("AT+CWJAP="" + String(ssid) + "","" + String(password) + """ + "rn");

delay(2000);

if (espSerial.find("OK")) {

      Serial.println("Connected to WiFi.");

      wifiConnected = true;

break;

    } else {

      Serial.println("Connection failed. Retrying...");

delay(2000);

    }

  }

}

void sendHttpPostRequest(const String& url, const String& postData) {

  String host = "172.20.10.3";

int port = 8080;

  espSerial.println("AT+CIPSTART="TCP","" + host + ""," + String(port));

delay(2000);

if (espSerial.find("CONNECT")||espSerial.find("ALREADY CONNECTED")) {

    Serial.println("Connect Succesfullyn");

    String cmd = "AT+CIPSEND=";

    cmd += String(postData.length() + 287 );

    espSerial.println(cmd);

if (espSerial.find(">")) {

      Serial.println("begin to send!!!");

      espSerial.println("POST /sensor/addRecord HTTP/1.1");

      espSerial.println("Host: "+ host +":"+port);

      espSerial.println("Content-Type: application/json");

      espSerial.println("Content-Length: " + String(postData.length()));

      espSerial.println("Authorization: " + token);  

      espSerial.println();

      espSerial.print(postData);

delay(1000);

      Serial.println("----------------------------------------------");

      Serial.println("POST /sensor/addRecord HTTP/1.1");

      Serial.println("Host: "+ host +":"+port);

      Serial.println("Content-Type: application/json");

      Serial.println("Content-Length: " + String(postData.length()));

      Serial.println("Authorization: " + token);  

      Serial.println();

      Serial.println(postData);

      Serial.println("----------------------------------------------");

    }

else {

      Serial.println("Failed to initiate data transmission.");

    }

  } else {

    Serial.println("Failed to connect to server.");

  }

}

分析：在setup中先连接WiFi，再到loop中进行TCP服务数据传输。

连接WiFi：AT+CWJAP="WiFi名","密码"

设置好AT模式：AT+CWMODE=1

进行TCP服务连接：AT+CIPSTART="TCP","172.20.10.3",8080

进入发送状态：AT+CIPSEND=373（总长度=报文头长度+传输数据长度postdata）

这边获取长度可能会很麻烦出现问题，有两个解决办法：①就是自己再编写一个程序来检测长度②使用透传模式（下面会有实例代码）

我的检测长度代码：（建议编写后串口输出格式来检查，并且同时用串口调试助手来检测是否成功）

注意：数据报文里面的长度是指数据的长度记得相对应，而非透传的AT的长度是头加数据的长度。

const String token = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJjbGFpbXMiOnsiaWQiOjEsInVzZXJuYW1lIjoieXVoaWRva2kifSwiZXhwIjoxNzIwMDU0NzY4fQ.do1vL_jNUXuACqkyf9Kxcgd_PO7wcyt3eYagpugTNuo"; // 替换成你的实际token

void setup() {

// put your setup code here, to run once:

Serial.begin(9600);

}

void loop() {

// Empty{"r":"2", "s":"11111", "t":"24.90", "h":"72", "p":"989","a":"9.24", "w":"88", "f":"1"}//86,405

// String postData0 = "{"r":"2", "s":"11111", "t":"24.90", "h":"72", "p":"989","a":"9.24", "w":"88", "f":"1"}";

String postData0 = "{"humidity":"70","temperature":"23"}";

// String postData = "POST /sensor/addRecord HTTP/1.1rn" + "Host: 172.20.10.3:8080rn" + "Content-Type: application/jsonrn" + "Content-Length: 89rn" + "Authorization: ";

String postData = "POST /sensordata HTTP/1.1rn"

"Host: 172.21.10.65:8080rn"

"Content-Type: application/jsonrn"

"Content-Length: 86rn";

// 计算 JSON 数据的长度

int contentLength = postData.length();

int contentLength1 = postData0.length();

// 打印计算结果

Serial.println(postData);

Serial.println(postData0);

Serial.print("JSON 数据的长度为: ");

Serial.println(contentLength);

Serial.println(contentLength1);

delay(10000);

}

发送数据报文：（根据你设定的数据报文来编写，因为为了服务器的安全可能会要求客户端需要key来请求响应，本实验就是token这个参数，后面需要的可以根据自己来定报文格式）（下面的换行必需要有）

POST /sensordata HTTP/1.1

Host: 172.21.10.65:8080

Content-Type: application/json

Content-Length: 36

{"temperature":"23","humidity":"70"}

三、完整代码及技术分析（主要为WiFi模块）

3.1完整代码：

已经注释掉发送的postData的调试代码及LCD显示代码。

#include <SoftwareSerial.h>

#include <DHT.h>

#include "HX711.h"

#define DHTPIN 4

#define DHTTYPE DHT11

#define POST_TIME 3000

SoftwareSerial espSerial(2, 3);

DHT dht(DHTPIN, DHTTYPE);

const String ssid = "";

const String password = "";

const String host = "172.20.10.3";

const int port = 8080;

const String url = "/sensor/addRecord";

const String token = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJjbGFpbXMiOnsiaWQiOjEsInVzZXJuYW1lIjoieXVoaWRva2kifSwiZXhwIjoxNzIwMzE0MDYzfQ.vm_0TNIRJOIhPifWcv1Jz_3pEJYzAmORUbGoR5K7wCY";

const String relatedCage = "2";

int samplingTime = 280;

int deltaTime = 40;

int sleepTime = 9680;

float voMeasured = 0;

float calcVoltage =0;

float pmTwoFiveDensity=0;

float pmTenDensity=0;

const int gasSensorPin = A0;

const int measurePin = A1;

const int ledPower = 5;

const int waterSensorPin = A2;

const int HX711_SCK = 6;

const int HX711_DT = 7;

const int buzzerPin = 8;

HX711 scale;

float tareWeight = 0;

float calibration_factor = 405.0;

void setup() {

Serial.begin(115200);

espSerial.begin(115200);

dht.begin();

scale.begin(HX711_DT, HX711_SCK);

tareWeight = scale.read_average(20);

float actualWeight = 658.0;

float detectedWeight = 645.0;

calibration_factor = calibration_factor * (detectedWeight / actualWeight);

connectToWiFi();

}

void loop() {

String sensorStatus = "";

float temperature = 0;

float humidity = 0;

temperature = dht.readTemperature();

humidity = dht.readHumidity();

bool dhtStatus = !(isnan(temperature) || isnan(humidity));

sensorStatus += dhtStatus ? "1" : "0";

if(!dhtStatus)

{

temperature = 0;

humidity = 0;

}

digitalWrite(ledPower,LOW);

delayMicroseconds(samplingTime);

voMeasured = analogRead(measurePin);

delayMicroseconds(deltaTime);

digitalWrite(ledPower,HIGH);

delayMicroseconds(sleepTime);

calcVoltage = voMeasured * (5.0/1024.0);

pmTwoFiveDensity =170 * calcVoltage;

bool pmStatus = (voMeasured >= 0 && voMeasured <= 65)||(voMeasured >= 120 && voMeasured <= 1023);

sensorStatus += pmStatus ? "1" : "0";

if(!pmStatus)

{

pmTwoFiveDensity = 0;

}

int gasSensorValue = analogRead(gasSensorPin);

float resistance = (1023.0 - gasSensorValue) * 10000 / gasSensorValue;

float compensatedResistance = compensateResistance(resistance, temperature, humidity);

float ammoniaConcentration = convertResistanceToConcentration(compensatedResistance);

bool gasStatus = (gasSensorValue >= 30 && gasSensorValue <= 80);

sensorStatus += gasStatus ? "1" : "0";

if(!gasStatus)

{

ammoniaConcentration = 0;

}

int waterSensorValue = analogRead(waterSensorPin);

int waterLevel = map(waterSensorValue, 47,670, 0, 100);

bool waterStatus = (waterSensorValue >= 0 && waterSensorValue <= 60)||(waterSensorValue >= 75 && waterSensorValue <= 1023);

sensorStatus += waterStatus ? "1" : "0";

if(!waterStatus)

{

waterLevel = 0;

}

float rawValue = scale.read_average(10);

float netWeight = (rawValue - tareWeight) / calibration_factor;

bool scaleStatus = (rawValue != 0);

sensorStatus += scaleStatus ? "1" : "0";

if(!scaleStatus)

{

netWeight = 0;

}

String postData = "{"r":"2", "s":"" + String(sensorStatus) + "", "t":"" + String(temperature) + "", "h":"" + String(humidity) + "", "p":"" + String(pmTwoFiveDensity) + "","a":"" + String(ammoniaConcentration) + "", "w":"" + String(waterLevel) + "", "f":"" + String(netWeight) + ""}";

sendHttpPostRequest("http://172.20.10.3:8080/sensor/addRecord", postData);

delay(POST_TIME);

}

void connectToWiFi()

{

bool wifiConnected = false;

Serial.println("AT+CWJAP="" + ssid + "","" + password + """ + "rn");

espSerial.println("AT+CWMODE=1");

while (!wifiConnected)

{

espSerial.println("AT+CWJAP="" + String(ssid) + "","" + String(password) + """ + "rn");

delay(2000);

if (espSerial.find("OK")) {

Serial.println("Connected to WiFi.");

wifiConnected = true;

break;

} else {

Serial.println("Connection failed. Retrying...");

delay(2000);

}

}

}

void sendHttpPostRequest(const String& url, const String& postData) {

String host = "172.20.10.3";

int port = 8080;

espSerial.println("AT+CIPSTART="TCP","" + host + ""," + String(port));

delay(2000);

if (espSerial.find("CONNECT")||espSerial.find("ALREADY CONNECTED")) {

Serial.println("Connect Succesfullyn");

String cmd = "AT+CIPSEND=";

cmd += String(postData.length() + 287 );

espSerial.println(cmd);

if (espSerial.find(">")) {

Serial.println("begin to send!!!");

espSerial.println("POST /sensor/addRecord HTTP/1.1");

espSerial.println("Host: "+ host +":"+port);

espSerial.println("Content-Type: application/json");

espSerial.println("Content-Length: " + String(postData.length()));

espSerial.println("Authorization: " + token);

espSerial.println();

espSerial.print(postData);

Serial.println("----------------------------------------------");

Serial.println("POST /sensor/addRecord HTTP/1.1");

Serial.println("Host: "+ host +":"+port);

Serial.println("Content-Type: application/json");

Serial.println("Content-Length: " + String(postData.length()));

Serial.println("Authorization: " + token);

Serial.println();

Serial.println(postData);

Serial.println("----------------------------------------------");

}

else {

Serial.println("Failed to initiate data transmission.");

}

} else {

Serial.println("Failed to connect to server.");

}

}

bool checkResponseForSubstring(const String& targetSubstring) {

bool substringFound = false;

String response = "";

while (espSerial.available()) {

char c = espSerial.read();

response += c;

Serial.print(c);

}

if (response.indexOf(targetSubstring) != -1) {

substringFound = true;

}

Serial.println("Full Response:");

Serial.println(response);

return substringFound;

}

float compensateResistance(float resistance, float temperature, float humidity) {

float compensatedResistance = resistance * (1 + temperature / 100.0) * (1 - humidity / 200.0);

return compensatedResistance;

}

float convertResistanceToConcentration(float compensatedResistance) {

float concentration = 100 / (compensatedResistance / 20000.0 + 1);

return concentration;

}

3.2技术分析：（建议边使用串口调试助手边编写AT命令代码） 3.2.1本次实验使用非透传模式：

①先使用AT命令连接WiFi：“666”为wifi名，“111”为密码

AT+CWJAP="666","111"

②设置模块模式：

AT+CWMODE=1

③连接TCP服务："192.168.148.194"为服务器IP，8080为使用的端口

AT+CIPSTART="TCP","192.168.148.194",8080

④开始发送数据：373为报文头长度加数据包的长度

AT+CIPSEND=373

⑤发送数据：格式要如下：/sensor/addRecord这个为你的api接口，

Authorization: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJjbGFpbXMiOnsiaWQiOjEsInVzZXJuYW1lIjoieXVoaWRva2kifSwiZXhwIjoxNzIwMzE0MDYzfQ.vm_0TNIRJOIhPifWcv1Jz_3pEJYzAmORUbGoR5K7wCY，这个字符串为为了安全的用户key，默认为没有这个需要根据后台来获取设计（这个可以不设计）

记得还有换行符不要漏了。

{"r":"2", "s":"11111", "t":"24.90", "h":"72", "p":"989","a":"9.24", "w":"88", "f":"1"}接下来就是数据格式按照这个来。

POST /sensor/addRecord HTTP/1.1

Host: 172.20.10.3:8080

Content-Type: application/json

Content-Length: 86

Authorization: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJjbGFpbXMiOnsiaWQiOjEsInVzZXJuYW1lIjoieXVoaWRva2kifSwiZXhwIjoxNzIwMzE0MDYzfQ.vm_0TNIRJOIhPifWcv1Jz_3pEJYzAmORUbGoR5K7wCY

{"r":"2", "s":"11111", "t":"24.90", "h":"72", "p":"989","a":"9.24", "w":"88", "f":"1"}

3.2.3透传模式：（个人认为这个比较方便简单）

①实例代码，传输温湿度（根据自己的情况来改写代码的参数）

#include <SoftwareSerial.h>

#include <DHT11.h>

#define POST_TIME 3000

SoftwareSerial espSerial(2, 3);

DHT11 dht11(7);

const String ssid = "";

const String password = "";

const String host = "172.19.76.71";

const int port = 8080;

const String url = "http://172.19.76.71:8080/sensordata";

void setup()

{

Serial.begin(115200);

espSerial.begin(115200);

connectToServer();

}

void loop()

{

int temperature = 0;

int humidity = 0;

int result = dht11.readTemperatureHumidity(temperature, humidity);

String postData = "{ "humidity":"" + String(humidity) + "","temperature":"" + String(temperature) + ""}";

sendHttpPostRequest(postData);

delay(POST_TIME);

}

void connectToServer()

{

espSerial.println("AT+CWQAP");

bool wifiConnected = false;

bool flag = false;

espSerial.println("AT+CWMODE=1");

while (!wifiConnected)

{

espSerial.println("AT+CWJAP="" + String(ssid) + "","" + String(password) + """ + "rn");

delay(2000);

if (espSerial.find("OK")) {

Serial.println("Connected to WiFi.");

wifiConnected = true;

break;

} else {

Serial.println("Connection failed. Retrying...");

delay(2000);

}

}

espSerial.println("AT+CIPMODE=1");

espSerial.println("AT+CIPMUX=0");

while(!flag)

{

espSerial.println("AT+CIPSTART="TCP","" + host + ""," + String(port));

delay(2000);

if(espSerial.find("OK")){

Serial.println("Connected to Server.");

flag=true;

break;

}

else{

Serial.println("Connected to Server failed.");

delay(2000);

}

}

espSerial.println("AT+CIPSEND");

}

void sendHttpPostRequest(const String& postData) {

espSerial.println("POST /sensordata HTTP/1.1");

espSerial.println("Host: "+ host + ":" + port);

espSerial.println("Content-Type: application/json");

espSerial.println("Content-Length: " + String(postData.length()));

espSerial.println();

espSerial.print(postData);

Serial.println("发送数据："+ postData);

}

②原理：

按照以下的AT命令来输出就行了（可以先用串口调试助手来实验一下）

连接WiFi：AT+CWJAP="wifi名","密码"

AT+CWMODE=1

AT+CIPMODE=1

AT+CIPMUX=0

AT+CIPSTART="TCP","172.19.76.71",8080//记得修改服务器IP和端口

AT+CIPSEND//开始发送数据不需要写长度

数据报文格式：

POST /sensordata HTTP/1.1
Host: 172.19.76.71:8080
Content-Type: application/json
Content-Length: 35

{"humidity":60,"temperature":25}

四、总结

1、postData的问题：

当postData传输的数据长度较短时，例如温湿度，传输过去是没有任何问题的。但本次实验是传输了8个数据，但postData会丢失然后将其串口输出为空值，后来将其分段输出串口可以显示两端字符串，但使用esp8266输出数据发现两个字符串中有一个会丢失。后来将总体变短如本实验变量均为一个字母代表。（个人认为可能是长度太长及硬件存储问题）。

2、WiFi模块和LCD模块

本次实验未能将WiFi和LCD一同使用，因为接上LCD模块后发现postData会出现为空，所以注释掉LCD模块，但不使用WiFi模块，LCD可以正常显示，（个人认为为资源抢夺问题）如下图：

总的来说，使用wifi模块离不开串口调试器的使用。

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