eduroam.ino

#include <ESP8266WiFi.h>

extern "C" {
#include "user_interface.h"
#include "wpa2_enterprise.h"
}

// SSID to connect to
static const char* ssid = "eduroam";
// Username for authentification
static const char* username = "myusername@myinstitution";
// Password for authentication
static const char* password = "mypassword";

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  
  // Setting ESP into STATION mode only (no AP mode or dual mode)
  wifi_set_opmode(STATION_MODE);
  
  struct station_config wifi_config;
  
  memset(&wifi_config, 0, sizeof(wifi_config));
  strcpy((char*)wifi_config.ssid, ssid);
  
  wifi_station_set_config(&wifi_config);
  
  wifi_station_clear_cert_key();
  wifi_station_clear_enterprise_ca_cert();
  
  wifi_station_set_wpa2_enterprise_auth(1);
  wifi_station_set_enterprise_identity((uint8*)username, strlen(username));
  wifi_station_set_enterprise_username((uint8*)username, strlen(username));
  wifi_station_set_enterprise_password((uint8*)password, strlen(password));
  
  wifi_station_connect();
  
  // 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());
}

void loop() {
// put your main code here, to run repeatedly:

}

https://github.com/esp8266/Arduino/issues/1032#issuecomment-314477339

So close and yet so far

This is what I did to get a working development environment:

I took a fresh Debian 9 x64 VM
I installed Arduino 1.8.3
In Arduino's package manager I added this repository
https://github.com/esp8266/Arduino/releases/download/2.4.0-rc1/package_esp8266com_index.json
I installed the 2.4.0-rc1 version of the esp8266 library
The 2.4.0-rc1 version of wpa2_enterprise.h does not yet contain the function wifi_station_set_enterprise_identity so I replaced ~/.arduino15/packages/esp8266/hardware/esp8266/2.4.0-rc1/tools/sdk/include/wpa2_enterprise.h with this newer file
https://github.com/espressif/ESP8266_NONOS_SDK/blob/master/include/wpa2_enterprise.h
Now I think that the binary library ~/.arduino15/packages/esp8266/hardware/esp8266/2.4.0-rc1/tools/sdk/lib/libwpa2.a also has to be replaced with a newer version that contains the wifi_station_set_enterprise_identity function. So I replaced that file with the version from the expressif SDK https://github.com/espressif/ESP8266_NONOS_SDK/blob/master/lib/libwpa2.a.

I then tried to compile the following code: