I've been reading to try understand how WPA2 Enterprise could be implemented.

This looks to be the relevant micropython code https://github.com/micropython/micropython/blob/master/esp8266/modnetwork.c#L97

It calls functions (viz. wifi_station_set_config and wifi_station_connect) in the Espressif esp8266 SDK https://espressif.com/sites/default/files/documentation/2c-esp8266_non_os_sdk_api_reference_en.pdf

There's a pertinent section in the SDK documentation about WPA2 Enterprise

3.14. WPA2_Enterprise APIs

ESP8266 Station can connect to WPA2_Enterprise APs.
WPA2_Enterprise APIs can be found in /ESP8266_NONOS_SDK/include/
wpa2_enterprise.h

3.14.15.WPA2_Enterprise Work Flow

Here is the work flow that prepares ESP266 station to connect to WPA2_Enterprise AP.

Call wifi_station_set_config to set the configuration of target AP.

Call wifi_station_set_wpa2_enterprise_auth(1); to enable WPA2_Enterprise authentication.

For EAP-TLS authentication, call wifi_station_set_enterprise_cert_key to set certificate and private key. wifi_station_set_enterprise_username is an optional choice, it can be called to set user name.

For EAP-TTLS or EAP-PEAP authentication, call wifi_station_set_enterprise_username and wifi_station_set_enterprise_password to set user name and password. wifi_station_set_enterprise_ca_cert is an optional choice, it can be called to set root certificate.

Call wifi_station_connect to connect to target AP.

After being connected to an AP, or failing to connect to AP and on stopped retries, please call the corresponding wifi_station_clear_enterprise_XXX APIs to release the resources

Uh oh!

esp8266: WPA2 Enterprise support? #2778

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