esp8266+http (PlatformIO)

esp8266 + http

使用esp8266发起http请求

#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>

#define led_1 2

const char *SSID = "优美屋205";
const char *PASSWORD = "18111549";
const char *URL = "http://192.168.124.17:3000/users";

void init_wifi();
void esp8266Http(); // http

HTTPClient httpClient;
WiFiClient client;

void setup() {
  Serial.begin(115200);
  pinMode(led_1, OUTPUT);
  init_wifi();
}

void loop() {
  digitalWrite(led_1, LOW);
  delay(500);
  digitalWrite(led_1, HIGH);
  delay(500);
  esp8266Http();
}

void init_wifi(){
  Serial.println("连接中...");
  Serial.println(SSID);

  WiFi.begin(SSID, PASSWORD);
  while (WiFi.status() != WL_CONNECTED)
  {
    delay(500);
    Serial.print(".");
  }

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

void esp8266Http(){
  httpClient.begin(client, URL);
  int httpResponseCode = httpClient.GET();

  if(httpResponseCode > 0){
    Serial.print("HTTP Response code: ");
    Serial.println(httpResponseCode);
    String payload = httpClient.getString();
    Serial.println(payload);
  }else{
    Serial.print("Error code:");
    Serial.println(httpResponseCode);
  }
  // 结束
  httpClient.end();
}