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ESP8266 Wi-Fi WPA2 Enterprise example
#include <ESP8266WiFi.h>
extern "C" {
#include "user_interface.h"
#include "wpa2_enterprise.h"
#include "c_types.h"
}
// SSID to connect to
char ssid[] = "TEST_KRA";
char username[] = "matheus_garbelini";
char identity[] = "matheus_garbelini";
char password[] = "testtest";
uint8_t target_esp_mac[6] = {0x24, 0x0a, 0xc4, 0x9a, 0x58, 0x28};
void setup() {
WiFi.mode(WIFI_STA);
Serial.begin(115200);
delay(1000);
Serial.setDebugOutput(true);
Serial.printf("SDK version: %s\n", system_get_sdk_version());
Serial.printf("Free Heap: %4d\n",ESP.getFreeHeap());
// 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);
strcpy((char*)wifi_config.password, password);
wifi_station_set_config(&wifi_config);
wifi_set_macaddr(STATION_IF,target_esp_mac);
wifi_station_set_wpa2_enterprise_auth(1);
// Clean up to be sure no old data is still inside
wifi_station_clear_cert_key();
wifi_station_clear_enterprise_ca_cert();
wifi_station_clear_enterprise_identity();
wifi_station_clear_enterprise_username();
wifi_station_clear_enterprise_password();
wifi_station_clear_enterprise_new_password();
wifi_station_set_enterprise_identity((uint8*)identity, strlen(identity));
wifi_station_set_enterprise_username((uint8*)username, strlen(username));
wifi_station_set_enterprise_password((uint8*)password, strlen((char*)password));
wifi_station_connect();
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.print(".");
}
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
}
void loop() {
}
@ziogianni
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ziogianni commented Jan 6, 2021 via email

@V-R-E
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V-R-E commented Jan 7, 2021

Hi @ziogianni,

It appears we are using the same board, mine is also an ESP8266 based NodeMCU "Amica" board I got off Amazon link here.

Short answer I've selected ("NodeMCU 1.0 (ESP-12E Module)") for the board.

I actually ran into some issues this evening while playing around with the code.
I am now trying to connect a smart RGBW downlight that uses a generic ESP8266 module to the WPA2 Enterprise network by reflashing it and haven't had any luck just the same boot loop issue. After an hour or so of trying I went back to using my NodeMCU, but forgot to switch the board type back. The sketch uploaded to the NodeMCU fine as you stated but was stuck in our previous discussed boot loop.

at least for this chip, many configurations seem to work (generic esp8266, feather, 12E) but maybe they lack of some features like wpa2 enterprise

I believe you are correct with the lack of some features as it seems that when the "Generic ESP8266 Module" is selected for the board the ESP refuses to connect to the network and gets stuck in a boot loop @Matheus-Garbelini hopefully knows more as I really have no idea.

Although once I reuploaded the sketch with the proper board selected ("NodeMCU 1.0 (ESP-12E Module)") the NodeMCU seemed to connect to the network just fine.

@ziogianni
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ziogianni commented Jan 7, 2021 via email

@Matheus-Garbelini
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Author

hi @ziogianni, you may need to confirm this, but check your EAP server logs, ESP32 may be using eap-tls version 1.0, which is can be rejected by EAP servers such as FreeRadius. In this case, I've had success by changing a TLS config as exemplified here: https://github.com/Matheus-Garbelini/esp32_esp8266_attacks#attention

This may be different depending on what EAP server you are using. I've no idea if this is possible on Windows EAP server for example.

@ziogianni
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ziogianni commented Jan 7, 2021 via email

@V-R-E
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V-R-E commented Jan 7, 2021

@Matheus-Garbelini Is it possible to manually configure the IP address in your code instead of using DHCP addressing?

I currently have our IT department reserving the IP address for my NodeMCU by using its device name, which works but I'd prefer to be able to configure the IP on my end.

@ziogianni
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ziogianni commented Jan 9, 2021

hi @ziogianni, you may need to confirm this, but check your EAP server logs, ESP32 may be using eap-tls version 1.0, which is can be rejected by EAP servers such as FreeRadius. In this case, I've had success by changing a TLS config as exemplified here: https://github.com/Matheus-Garbelini/esp32_esp8266_attacks#attention

This may be different depending on what EAP server you are using. I've no idea if this is possible on Windows EAP server for example.

Hi @Matheus-Garbelini, I gave a check to the freeradius configuration files and as I supposed there was a section related to the TLS settings.
The two variables I found tls_min_version and tls_max_version in the eap.cnf file are respectively set to 1.0 and 1.3.

So TLS 1.0 should be already supported by the server I'm using.

@ziogianni
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Hello @ziogianni I was having a similar issue while using a NodeMCU. The board would try to connect then reboot, it would occasionally obtain an IP but would only stay connected to the network for about 8 seconds before rebooting again.

The thing that seemed to fix the problem for me was to go to the Tools tab in the Arduino IDE and after selecting the proper ESP board there should be an Erase Flash: drop down option towards the bottom. Try changing the default setting of "Only Sketch" to "All Flash Contents" I hope this helps.

@V-R-E Unfortunately it didn't work for me, it restarts and keeps saying Connection Status: 4

@hutje
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hutje commented Feb 1, 2021

So it is possible to use WPA2 Enterprise with an esp8266?

@venetanji
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Just a heads up everyone, if identity is not set, it will not be empty, it is acutually set to anonymous@espressif.com.

Here's my version of the above with websocket, works with peap mschapv2 at my uni:

https://gist.github.com/venetanji/d71dc271ebf51236ec6ce99aa48eee26

@alvarovaro
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alvarovaro commented Apr 5, 2021

Hi, I'm getting this message from the Serial Monitor constantly. I am using a NodeMCU v1.0 board. I already set Erase Flash option to All flash contents but did not work.

Any comments on how to solve it?

,,,,,,,,,,pm open,type:2 0
14:40:29.211 -> ,,,,,,,,,,,,,,,,,,,,state: 5 -> 0 (2)
14:40:48.703 -> rm 0
14:40:48.703 -> pm close 7
14:40:48.703 -> reconnect
14:40:48.805 -> scandone
14:40:48.805 -> state: 0 -> 2 (b0)
14:40:48.805 -> state: 2 -> 3 (0)
14:40:48.805 -> state: 3 -> 5 (10)
14:40:48.805 -> add 0
14:40:48.805 -> aid 1
14:40:48.805 -> cnt
14:40:49.204 -> ,,,,,,,,,,pm open,type:2 0
14:40:59.208 -> ,,,,,,,,

@ziogianni
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ziogianni commented Apr 5, 2021 via email

@alvarovaro
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Hi, thanks for yout reply.

The certs are in the following format :
char ssid[] = "CNIOPROF";
char username[] = "";
char identity[] = "
";
char password[] = "xxxx";
That should be hex, right?

Regarding the TLS, I am using a nodemcu board whose TLS version is 1.2. How can I chech which versions are supported by the server?

After all what I do is basically uploading that code to the nodemcu.

I am quite new to this Arduino environment. Thanks for your patience.

@bear-zd
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bear-zd commented Dec 4, 2022

I meet the same problem when use the code above. Using arduino IDE.
hardware: ESP-12F ESP8266MOD
using NodeMCU 1.0(ESP-12E)_ and erase all flash content
after it connect the wifi , it just keep about 8 second and then restart. Why this happened and if there is a valid method to solve this?

@ziogianni
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ziogianni commented Dec 4, 2022 via email

@ziogianni
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ziogianni commented Feb 25, 2023 via email

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