[Solved] Meaning of reason codes in system_event_sta_disconnected_t?

[kolban]

One of the WiFi events that we can receive is SYSTEM_EVENT_STA_DISCONNECT which indicates that the ESP32 has been disconnected from an access point when acting as a station. In the corresponding data type (system_event_sta_disconnected_t) there is a field called "reason" that is an 8 bit flag that indicates the reason for the disconnection. What I am looking for is a description of the potential codes that can be returned. Do we have those?

[ESP_igrr]

There is an anonymous enum in esp_wifi_types.h with members called WIFI_REASON_xxx. These are disconnect reasons. Will update event structure to use this enum.
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[kolban]

Perfect, exactly what I was looking for. For others who may search, here are the code as they are today from the header file:

Code: Select all

WIFI_REASON_UNSPECIFIED              = 1,
WIFI_REASON_AUTH_EXPIRE              = 2,
WIFI_REASON_AUTH_LEAVE               = 3,
WIFI_REASON_ASSOC_EXPIRE             = 4,
WIFI_REASON_ASSOC_TOOMANY            = 5,
WIFI_REASON_NOT_AUTHED               = 6,
WIFI_REASON_NOT_ASSOCED              = 7,
WIFI_REASON_ASSOC_LEAVE              = 8,
WIFI_REASON_ASSOC_NOT_AUTHED         = 9,
WIFI_REASON_DISASSOC_PWRCAP_BAD      = 10,
WIFI_REASON_DISASSOC_SUPCHAN_BAD     = 11,
WIFI_REASON_IE_INVALID               = 13,
WIFI_REASON_MIC_FAILURE              = 14,
WIFI_REASON_4WAY_HANDSHAKE_TIMEOUT   = 15,
WIFI_REASON_GROUP_KEY_UPDATE_TIMEOUT = 16,
WIFI_REASON_IE_IN_4WAY_DIFFERS       = 17,
WIFI_REASON_GROUP_CIPHER_INVALID     = 18,
WIFI_REASON_PAIRWISE_CIPHER_INVALID  = 19,
WIFI_REASON_AKMP_INVALID             = 20,
WIFI_REASON_UNSUPP_RSN_IE_VERSION    = 21,
WIFI_REASON_INVALID_RSN_IE_CAP       = 22,
WIFI_REASON_802_1X_AUTH_FAILED       = 23,
WIFI_REASON_CIPHER_SUITE_REJECTED    = 24,

WIFI_REASON_BEACON_TIMEOUT           = 200,
WIFI_REASON_NO_AP_FOUND              = 201,
WIFI_REASON_AUTH_FAIL                = 202,
WIFI_REASON_ASSOC_FAIL               = 203,
WIFI_REASON_HANDSHAKE_TIMEOUT        = 204,

[mgleason_3]

@ESP_igrr
>>Will update event structure to use this enum

Did you get a chance to do this? It looks like it's still an unnamed enum that can't be accessed.

[gunar.kroeger]

@ESP_igrr
>>Will update event structure to use this enum

Did you get a chance to do this? It looks like it's still an unnamed enum that can't be accessed.

[ESP_igrr]

It is no longer an anonymous enum; it is typedef'ed wifi_err_reason_t.

[gunar.kroeger]

From "esp_event_legacy.h":

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typedef struct {
    uint8_t ssid[32];         /**< SSID of disconnected AP */
    uint8_t ssid_len;         /**< SSID length of disconnected AP */
    uint8_t bssid[6];         /**< BSSID of disconnected AP */
    uint8_t reason;           /**< reason of disconnection */
} system_event_sta_disconnected_t;

Is this struct redefined elsewhere?

[ESP_igrr]

I think the uint8_t has been kept in the event struct for compatibility reasons, however the reason codes themselves are now part of the typedefed enum. So you can directly assign/compare them (in C) or cast (in C++).