#include <WiFi.h>
#include <HTTPClient.h>
 
void setup() {
/* wifi --dhcp client --connect */
  Serial.begin(115200);
  WiFi.mode(WIFI_STA);
  WiFi.begin("ssid", "password");
 
  while (WiFi.status() != WL_CONNECTED) {
    delay(500); Serial.print(".");
  }
  Serial.print("WiFi connect: OK    ");
  Serial.print("RSSI:");
  Serial.print(WiFi.RSSI());// WiFi受信強度[dBm]
  Serial.println("[dBm]");
//  Serial.print("IP address:");
//  Serial.println(WiFi.localIP());
  
/*　ntpサーバに接続　*/
  configTime(9 * 3600L, 0, "192.168.xx.xx"); 
  struct tm timeInfo;
  char s[32];
 
  getLocalTime(&timeInfo);
  sprintf(s, " %04d/%02d/%02d %02d:%02d:%02d",
          timeInfo.tm_year + 1900, timeInfo.tm_mon + 1, timeInfo.tm_mday,
          timeInfo.tm_hour, timeInfo.tm_min, timeInfo.tm_sec);
   Serial.println(s);
}
 
void loop() {
  String para1="ESP32";
  float para2=23.4, para3=567.89012;
  int para4=900;
  int32_t para5=WiFi.RSSI();
  
  String httpRequestData ="";
  httpRequestData += "para1=" + String(para1);
  httpRequestData += "&para2=" + String(para2);
  httpRequestData += "&para3=" + String(para3);
  httpRequestData += "&para4=" + String(para4);
  httpRequestData += "&para5=" + String(para5);
  
  //HTTPClientでPOST
  HTTPClient httpclient;
  httpclient.begin("http://192.168.xx.xx:8080/esp32/ESP32");
  httpclient.addHeader("Content-Type", "application/x-www-form-urlencoded");  

  // Send HTTP POST request
  int httpCode = httpclient.POST(httpRequestData);
  
  if( httpCode == HTTP_CODE_OK ){//送信OK
    Serial.printf("[POST]Send to server (%s)\n",postURL);
    Serial.println(httpRequestData);
  } else {//送信失敗
    Serial.printf("[HTTP] POST... failed, error: %s\n", httpclient.errorToString(httpCode).c_str());
  }
  Serial.println();
  //HTTPClient終了
  httpclient.end();
  delay(5000);  
  }