Send Data to adafruit Clound

post.cpp

#include "esp_wpa2.h"
#include <WiFi.h>
#include <HTTPClient.h>

// SSID to connect to
static const char* ssid = "MMBBS-Intern";

// Username for authentification
#define EAP_ID "tuttas"
#define EAP_USERNAME "tuttas"
#define EAP_PASSWORD "geheim"

HTTPClient http;

void setup()
{
    Serial.begin(115200);
    delay(500);

    WiFi.disconnect(true);
    esp_wifi_sta_wpa2_ent_set_identity((uint8_t *)EAP_ID, strlen(EAP_ID));
    esp_wifi_sta_wpa2_ent_set_username((uint8_t *)EAP_USERNAME, strlen(EAP_USERNAME));
    esp_wifi_sta_wpa2_ent_set_password((uint8_t *)EAP_PASSWORD, strlen(EAP_PASSWORD));
    esp_wpa2_config_t config = WPA2_CONFIG_INIT_DEFAULT();
    esp_wifi_sta_wpa2_ent_enable(&config);
    WiFi.begin(ssid);

  // Wait for connection AND IP address from DHCP
    Serial.println();
    Serial.println("Waiting for connection and IP Address from DHCP");
    while (WiFi.status() != WL_CONNECTED)
    {
        delay(2000);
        Serial.print(".");
    }
    Serial.println("");
    Serial.println("WiFi connected");
    Serial.println("IP address: ");
    Serial.println(WiFi.localIP());
    HTTPClient http;
    http.begin("https://io.adafruit.com/api/v2/jtuttas/feeds/esp32/data");
    http.addHeader("Content-Type", "application/json");
    http.addHeader("X-AIO-Key", "geheim");
    http.POST("{\"value\":\"21.3\"}");
    http.writeToStream(&Serial);
    http.end();
}

void loop()
{
}