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esp8266httpclient_get_post使用

#include<ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>//const char *ssid = "AxxxIFI";
const char *password = "xxxs879xxx68";const char* ssid = "IT-nxxxang";const char* URL = "http://172.127.5.27:927/";   // 测试HTTP请求用的URL。注意网址前面必须添加"http://"
const char* post_string = "{\"robot_id\":1}";void setup() {Serial.begin(115200);  //启动串口，并设置波特率为115200connectWiFi();        //连接WiFihttpClientRequest();  //通过客户端发送http请求，并响应
}void loop() {httpClientRequest();  //通过客户端发送http请求，并响应delay(5000);
}void httpClientRequest(){HTTPClient httpClient;          //1、创建http的客户端httpClient.begin(URL);          //2、通过begin函数配置请求地址。此处也可以不使用端口号Serial.print("URL: "); Serial.println(URL);//int httpCode = httpClient.GET();  //3、通过GET函数启动连接并发送HTTP请求int httpCode = httpClient.POST(post_string);if (httpCode > 0) {Serial.printf("[HTTP] GET... code: %d\n", httpCode);if (httpCode == HTTP_CODE_OK) {String payload = httpClient.getString();    //获取响应体Serial.println(payload);} else {Serial.printf("[HTTP] GET... failed, error: %s\n", httpClient.errorToString(httpCode).c_str());}} else {Serial.printf("[HTTP] Unable to connect\n");}httpClient.end();
}void connectWiFi(){Serial.println();Serial.print("Connecting to");Serial.println(ssid);WiFi.begin(ssid,password);                  //启动WIFIwhile(WiFi.status()!=WL_CONNECTED){         //判断WiFi的连接状态，如果没有连接成功，等待delay(500);Serial.print(".");}Serial.println("");Serial.println("WiFi connected");Serial.print("IP address:");Serial.println(WiFi.localIP());    //获取本机的IP
}