WiFiMulti not working with hidden SSID

[trlafleur]

In a quick test with the provided example for WiFiMulti, I was unable to connect to a hidden SSID...

If I use the standard WiFi.begin(nSSID, nPassword); version, all work fine and it can find the hidden SSID.

Arduino IDE 1.8.10
ESP32 Arduino 1.0.4

/*
 *  This sketch tries to Connect to the best AP based on a given list
 *
 */

#include <WiFi.h>
#include <WiFiMulti.h>

WiFiMulti wifiMulti;

void setup()
{
    Serial.begin(115200);
    delay(100);
    
    WiFi.disconnect(true);
    WiFi.mode(WIFI_STA);
    
    wifiMulti.addAP("hiddenssid", "12345");          // Hidden SSID, will not work
    wifiMulti.addAP("openssid", "12345");             // open SSID, work fine...

    Serial.println("Connecting Wifi...");
    if(wifiMulti.run() == WL_CONNECTED) {
        Serial.println("");
        Serial.println("WiFi connected");
        Serial.print("IP address: ");
        Serial.println(WiFi.localIP());
        Serial.print("SSID: ");
        Serial.println(WiFi.SSID());
        Serial.print("Channel: ");
        Serial.println(WiFi.channel());
    }
}

void loop()
{
    if(wifiMulti.run() != WL_CONNECTED) {
        Serial.print("WiFi not connected!  ");
        Serial.println(WiFi.status());
        delay(1000);
    }
}

[D][WiFiGeneric.cpp:337] _eventCallback(): Event: 0 - WIFI_READY
[D][WiFiGeneric.cpp:337] _eventCallback(): Event: 2 - STA_START
[I][WiFiMulti.cpp:84] addAP(): [WIFI][APlistAdd] add SSID: lafleur
[D][WiFiGeneric.cpp:337] _eventCallback(): Event: 1 - SCAN_DONE
[I][WiFiMulti.cpp:114] run(): [WIFI] scan done
[I][WiFiMulti.cpp:119] run(): [WIFI] 1 networks found
[D][WiFiMulti.cpp:151] run():        0: [1][82:2A:A8:D7:F3:34] RSF-Guest (-57) *
[E][WiFiMulti.cpp:191] run(): [WIFI] no matching wifi found!
[D][WiFiGeneric.cpp:337] _eventCallback(): Event: 1 - SCAN_DONE
[I][WiFiMulti.cpp:114] run(): [WIFI] scan done
[I][WiFiMulti.cpp:119] run(): [WIFI] 1 networks found
[D][WiFiMulti.cpp:151] run():        0: [1][82:2A:A8:D7:F3:34] RSF-Guest (-58) *

[lbernstone]

Does it work if the hidden ssid is the only one added to the list?

[trlafleur]

No...

[atanisoft]

WiFi.scanNetworks() will not show hidden SSIDs by default, WiFiMulti doesn't pass the flag to enable hidden networks to be included. You can try changing this line to:

scanResult = WiFi.scanNetworks(false, true);

And see if it works.

[trlafleur]

If the hidden flag is set to true, Scan will return an entry in its scan table for all AP it sees with RSSI, channel and other information... what needs to happen in the WiFiMulti code is if scan returns an SSID of empty, ie: its hidden, it should try a connection with all the "requested" SSID to see if it can connect... As a minimum, a note needs to be added that code will NOT work with hidden SSID.. but again, more and more we are seeing hidden SSID everywhere---> so this code should be fixed to support hidden SSID. ~~ _/) ~~~~ _/) ~~~~ _/) ~~~~ _/) ~~ Tom Lafleur

…

On Sun, Oct 6, 2019 at 2:11 PM Mike Dunston ***@***.***> wrote: WiFi.scanNetworks() will not show hidden SSIDs by default, WiFiMulti doesn't pass the flag to enable hidden networks to be included. You can try changing this line <https://github.com/espressif/arduino-esp32/blob/master/libraries/WiFi/src/WiFiMulti.cpp#L103> to: scanResult = WiFi.scanNetworks(false, true); And see if it works. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#3325?email_source=notifications&email_token=ABC4EK7JXPIMESJ66TES3KDQNJIAZA5CNFSM4I546J3KYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEAOUE6Q#issuecomment-538788474>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ABC4EK22DKEI42XMKSTDIWDQNJIAZANCNFSM4I546J3A> .

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[STALE_SET] This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 14 days if no further activity occurs. Thank you for your contributions.

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[BararDiHoumes]

I were expecting fix for this as well, and after all this time none work on it ? Really ?

[lucasssvaz]

Fixed by #9202