WiFiManager: wifiManager.getWiFiPass() returns an empty string

Using ESP32 version 1.0.4 on development branch.

After successful config, calling wifiManager.getWiFiPass(true) consistently returns an empty string.

POST SERIAL OUTPUT !

Code:

    preferences.putString(ATTR_WIFI_SSID, wifiManager.getWiFiSSID(true /*persistent*/));
    preferences.putString(ATTR_WIFI_PASS, wifiManager.getWiFiPass(true /*persistent*/));

    Serial.printf("wifiManager id: %s value: %s\n", ATTR_WIFI_SSID, preferences.getString(ATTR_WIFI_SSID).c_str());
    Serial.printf("**BUG** wifiManager id: %s value: %s\n", ATTR_WIFI_PASS, preferences.getString(ATTR_WIFI_PASS).c_str());
    Serial.printf("**BUG** wifiManager id: %s value: %s\n", ATTR_WIFI_PASS, wifiManager.getWiFiPass(true).c_str());
    Serial.printf("**BUG** wifiManager id: %s value: %s\n", ATTR_WIFI_PASS, wifiManager.getWiFiPass(false).c_str());

Output:

07:07:26.627 -> wifiManager id: wifi_ssid value: exampleSSID
07:07:26.627 -> **BUG** wifiManager id: wifi_pass value: 
07:07:26.627 -> **BUG** wifiManager id: wifi_pass value: 
07:07:26.627 -> **BUG** wifiManager id: wifi_pass value: 
07:07:26.627 -> id: wifi_pass value: SuperSecret valueLen: 40 label: ssid password (to be saved)
07:07:26.627 -> wifiManager parameters saved as preferences

if you have a stack dump decode it: N/A

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Basic Infos

Hardware

WiFimanager Branch/Release:

Master
Development

Esp8266/Esp32:

ESP8266
ESP32

Hardware: ESP-12e, esp01, esp25

ESP01
ESP12 E/F/S (nodemcu, wemos, feather) – https://learn.adafruit.com/adafruit-huzzah32-esp32-feather
Other

ESP Core Version: 2.4.0, staging

ESP32 version 1.0.4

Description

wifiManager.getWiFiPass(true); OR wifiManager.getWiFiPass(false); are not returning the SSID password configured.

Settings in IDE

N/A

Additional libraries: N/A

Sketch

See:
https://github.com/flavio-fernandes/persistWifiSetting/commit/5ad667b862638722c2ee032105ed32c535aa1ce7

Debug Messages

N/A

About this issue

Original URL
State: open
Created 4 years ago
Comments: 19 (6 by maintainers)

Commits related to this issue

wifiManager.getWiFiPass() returns an empty string Use this commit and the readme on this repo to reproduce issue: Serial.printf("**BUG** wifiManager id: %s value: %s\n", ATTR_WIFI_PASS, preferences.... — committed to flavio-fernandes/persistWifiSetting by flavio-fernandes 4 years ago
hackForIssue1004 Trying out change proposed by gauix4 on https://github.com/tzapu/WiFiManager/issues/1004#issuecomment-583530881 It worked as expected! Meaning, Open wifiManager.getWiFiPass() shoul... — committed to flavio-fernandes/WiFiManager by flavio-fernandes 4 years ago
hackForIssue1004 Trying out change proposed by gauix4 on https://github.com/tzapu/WiFiManager/issues/1004#issuecomment-583530881 It worked as expected! So, this may mean that wifiManager.getWiFiPass... — committed to flavio-fernandes/WiFiManager by flavio-fernandes 4 years ago
hackForIssue1004 Trying out change proposed by gauix4 on https://github.com/tzapu/WiFiManager/issues/1004#issuecomment-583530881 — committed to flavio-fernandes/persistWifiSetting by flavio-fernandes 4 years ago

Most upvoted comments

@flavio-fernandes can you drop your code here i take a look and test

hello @gauix4 . My code is here:

https://github.com/flavio-fernandes/persistWifiSetting

You can look at branch issueWifiPass for how I reproduce it.

I am good dealing with this issue now, thanks to your help and @tablatronix .

Much appreciated.

flavio-fernandes on Feb 8, 2020

@flavio-fernandes can you drop your code here i take a look and test

gauix4 on Feb 8, 2020

wifimanager restores the wifi mode that it was at in your sketch, Your mode is WIFI_OFF

if you call autoconnect we change this automatically, you are not calling it. You will need to set a mode in your sketch in setup, as esp32 does not automatically do this like esp8266. Also as in wm v.0 as it was buggy and clobbered your settings. development now works properly with persistent and will let you go back to your previous “current” wifi settings(non persistent)

Now there might still be a bug, have you tried restarting and then starting wifi or just starting wifi after saving ? and see if it was stored, if its persistent it should then work, unless there is a bug causing saves to not be persistent, but there is not that I know of

tablatronix on Feb 8, 2020

@flavio-fernandes @tablatronix

add to wifimanager.ccp

String WiFiManager::getSSID() {
  if (_ssid == "") {
    DEBUG_WM(F("Reading SSID"));
    _ssid = WiFi.SSID();
    DEBUG_WM(F("SSID: "));
    DEBUG_WM(_ssid);
  }
  return _ssid;
  }

  String WiFiManager::getPassword() {
  if (_pass == "") {
    DEBUG_WM(F("Reading Password"));
    _pass = WiFi.psk();
    DEBUG_WM("Password: " + _pass);
    DEBUG_WM(_pass);
  }
  return _pass;
  }


then in wifimanager.h add
    
String        getSSID();
String        getPassword();

arduino code 

WiFiManager wifiManager;
wifiManager.autoConnect("Hello Word");
Serial.println(getSSID());
Serial.println(getPassword());

here you have the return of ssid and password

gauix4 on Feb 8, 2020