arduino D1 wifi模块（WeMos D1）ESP8266链接网络以及HTTPClient发送post请求和get请求

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#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
#include <ArduinoJson.h> // 必须是5 不能安装v6
// 测试HTTP请求用的URL。注意网址前面必须添加"http://"
#define URL "http://192.168.8.104:8080/findByDetection"
#define POSTURL "http://192.168.8.104:8080/findByDetection"
// 设置wifi接入信息(请根据您的WiFi信息进行修改)
const char* ssid = "cxy";
const char* password = "12345678";

void setup() {
//初始化串口设置
Serial.begin(9600);

//设置ESP8266工作模式为无线终端模式
WiFi.mode(WIFI_STA);

//开始连接wifi
WiFi.begin(ssid, password);

//等待WiFi连接,连接成功打印IP
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.print(".");
}
Serial.println("");
Serial.print("WiFi Connected!");
httpClientRequest();
}

void loop() {
// httpClientRequest();
// delay(1000);
}

// 发送HTTP请求并且将服务器响应通过串口输出
void httpClientRequest(){
//重点1 创建 HTTPClient 对象
HTTPClient httpClient;
//重点2 通过begin函数配置请求地址。此处也可以不使用端口号和PATH而单纯的
httpClient.begin(URL);
Serial.print("URL: "); Serial.println(URL);
//重点3 通过GET函数启动连接并发送HTTP请求
int httpCode = httpClient.GET();
Serial.print("Send GET request to URL: ");
Serial.println(URL);
DynamicJsonDocument doc(1024);
//重点4. 如果服务器响应HTTP_CODE_OK(200)则从服务器获取响应体信息并通过串口输出
//如果服务器不响应HTTP_CODE_OK(200)则将服务器响应状态码通过串口输出
if (httpCode == HTTP_CODE_OK) {
// 使用getString函数获取服务器响应体内容
String responsePayload = httpClient.getString();
Serial.println("Server Response Payload: ");
if(responsePayload.length() !=0) {
Serial.println(responsePayload);
deserializeJson(doc, responsePayload);
JsonObject obj = doc.as<JsonObject>();
int id = obj["id"];
Serial.println(id);
httpClient.end();
httpAdd(id);
}else {
httpClient.end();
}

} else {
Serial.println("Server Respose Code：");
Serial.println(httpCode);
}

//重点5. 关闭ESP8266与服务器连接
httpClient.end();
}

/**
* 处理写入数据
*/
void httpAdd(int id){
HTTPClient httpClient;
httpClient.begin(URL);
//这句话非常的重要否则无法post到服务器上参数无法取得。
httpClient.addHeader("Content-Type", "application/x-www-form-urlencoded");
int httpCode = httpClient.POST("id="+id+"&po=333333");
if (httpCode > 0) {
if (httpCode == HTTP_CODE_OK) {
String httpString = httpClient.getString();
Serial.println("getString："+httpString);
}
}
httpClient.end();
Serial.println("写入数据");
Serial.println(id);
}