Smart config will not reconnect automatically after restart

[bill-orange]

Hardware:

Board: ESP32 Wemos
Core Installation/update date: not sure, latest, I think
IDE name: Arduino IDE
Flash Frequency: 80Mhz
Upload Speed: 115200

Description:

SmartConfig behave differently on ESP32 than ESP8266. Both connect using the phone APP just fine. Upon a restart the ESP8266 will reconnect. The ESP32 will not reconnect and will search until I use the phone APP again to provide credentials.

Shouldn't they behave the same and reconnect? Could there be something in my ESP32 code inhibiting re-connection?

Sketch:

Standard examples embedded in my lengthy sketch.

/

[bill-orange]

I added:

sta_conf->bssid_set = 0;

to the .cpp file and recompiled. It made no difference. If I reset the ESP32 it searches forever until I use the phone app. Is there any else I need to do to effect the change? I started testing from an esptool erase, just to be fair :) I presume that the intended behavior would be that the SSID and PASSWORD would be preserved on a esp.restart call or on a reboot button press. On power loss, the credentials would be lost. That's how the ESP8266 version seems to work. It sure would be nice if a flag could be set to preserve the credentials in EEPROM for a power loss, if desired. I can see how this would be a security risk in some situations, however.

Here's my connect function:

void setupWiFi () {
/* Set ESP32 to WiFi Station mode /
WiFi.mode(WIFI_AP_STA);
/ start SmartConfig */
WiFi.beginSmartConfig();

/* Wait for SmartConfig packet from mobile */
Serial.println("Waiting for SmartConfig.");
while (!WiFi.smartConfigDone()) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("SmartConfig done.");

/* Wait for WiFi to connect to AP */
Serial.println("Waiting for WiFi");
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("WiFi Connected.");
Serial.print("IP Address: ");
Serial.println(WiFi.localIP());
}

Here's verbose debug:

entry 0x40078a3c
[D][WiFiGeneric.cpp:265] _eventCallback(): Event: 14 - AP_STACONNECTED
[D][WiFiGeneric.cpp:265] _eventCallback(): Event: 14 - AP_STACONNECTED
[D][WiFiGeneric.cpp:265] _eventCallback(): Event: 14 - AP_STACONNECTED
Waiting for SmartConfig.
.........[D][WiFiSTA.cpp:621] _smartConfigCallback(): Status: FIND_CHANNEL
.....................................................................

[bill-orange]

I think we can close this issue. I still think, that as an objective, smartConfig should behave the same on an ESP32 as it does on an ESP8266 for software portability.

[johnty]

any updates on this? would be great if this could work the same as the esp8266!

[NareshDealer]

I m having similar problem.. where the ssid and password is not getting stored and i need to resupply the ssid and password.