Debug output says wifi connected, but WiFi.status() keeps returning 7

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Évaluation

Difficulté
4/5
Temps estimé
3-5 jours
Accessibilité débutants
25/100
Type d'issue
Bug
Clarté
À clarifier
Activité
À l'abandon
Stack technique
cpp
Domaine
embedded-iot, networking

Piste de recherche

Commencez par le sketch setup() et reproduisez le comportement réseau signalé tout en comparant la sortie interne « connected with CASAS » à WiFi.status(). Suivez les transitions des états de connexion et DHCP affichées dans le journal série ; la tâche est terminée lorsque vous avez identifié si le message de débogage, la valeur d’état ou une déconnexion immédiate est incohérent(e).

Rédigé par le modèle d'indexation à partir du texte de l'issue.

Description

This seems to happen randomly (but often) on some networks. I'm seeing this on a particular wifi network almost systematically (but not quite) while the same code on the same board had worked for ages on other networks.

This is my code (simplified):

void setup() {
  String client_ssid = "mySSID";
  String clien_password = "mypassword";

  WiFi.mode(WIFI_STA);
  WiFi.begin(client_ssid.c_str(), client_password.c_str());

  for (int i=0; i<20; i++) {
    Serial.println("Trying to connect to Wifi '%s' with password '%s'\n", client_ssid.c_str(), client_password.c_str());
    delay(1000)
    if (WiFi.status()==WL_CONNECTED) {
      Serial.println("...connected succesfully\n");
      // Here I would normally do stuff...

      return;
    }
  }
  Serial.println("Cannot connect to WiFi!\n");
  return;
}

fpm close 3 
mode : sta(80:7d:3a:3c:e2:1d)
add if0
Trying to connect to Wifi 'CASAS' with password '******'
Trying to connect to Wifi 'CASAS' with password '******'
Trying to connect to Wifi 'CASAS' with password '******'
scandone
state: 0 -> 2 (b0)
Trying to connect to Wifi 'CASAS' with password '******'
state: 2 -> 3 (0)
state: 3 -> 5 (10)
add 0
aid 17
cnt 

connected with CASAS, channel 6
dhcp client start...
Trying to connect to Wifi 'CASAS' with password '******'
Trying to connect to Wifi 'CASAS' with password '******'
Trying to connect to Wifi 'CASAS' with password '******'
Trying to connect to Wifi 'CASAS' with password '******'
Trying to connect to Wifi 'CASAS' with password '******'
Trying to connect to Wifi 'CASAS' with password '******'
Trying to connect to Wifi 'CASAS' with password '******'
Trying to connect to Wifi 'CASAS' with password '******'
Trying to connect to Wifi 'CASAS' with password '******'
pm open,type:2 0
Trying to connect to Wifi 'CASAS' with password '******'
Trying to connect to Wifi 'CASAS' with password '******'
Trying to connect to Wifi 'CASAS' with password '******'
Trying to connect to Wifi 'CASAS' with password '******'
Trying to connect to Wifi 'CASAS' with password '******'
Trying to connect to Wifi 'CASAS' with password '******'
Trying to connect to Wifi 'CASAS' with password '******'
Cannot connect to WiFi!

Note where it says "Connected to ... channel 6": that's not from my println()s, that's some internal output.

It was able to connect once or twice on the very same network, which is working fine and the password is correct, obviously.

I'm reporting it here because there's internal debug output that says "connected" and yet status() is returning WL_DISCONNECTED, so that's an inconsistency that is obviously in software. Either the debug output that says "connected" is bogus, or status() is returning the wrong value (or it connects and immediately loses connection, and there's no debug output for that which would be a bug too - but that seems pretty unlikely).

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C++
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