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[GH-ISSUE #448] Programatically changing SSID & Password while connected? #379

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opened 2026-02-28 01:25:02 +03:00 by kerem · 7 comments

kerem commented

2026-02-28 01:25:02 +03:00

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Originally created by @gjt211 on GitHub (Nov 3, 2017).
Original GitHub issue: https://github.com/tzapu/WiFiManager/issues/448

I have been using this excellent library for some time now and would like to implement something that I can't find or work out a solution for.

I would like on rare occasions to change the SSID & password.

In my scenario, the ESP8266 is connected to an AP, and also to an MQTT server.
What I would like to do is send a new SSID and password, then have them stored wherever they need to go, then I can reboot the ESP8266 and it will connect to the newly stored AP.

I am not asking how to send the values, I can already do that. What I want to know is once I have the values in variables, how can I update the existing ones?

Can this be done?

Originally created by @gjt211 on GitHub (Nov 3, 2017). Original GitHub issue: https://github.com/tzapu/WiFiManager/issues/448 I have been using this excellent library for some time now and would like to implement something that I can't find or work out a solution for. I would like on rare occasions to change the SSID & password. In my scenario, the ESP8266 is connected to an AP, and also to an MQTT server. What I would like to do is send a new SSID and password, then have them stored wherever they need to go, then I can reboot the ESP8266 and it will connect to the newly stored AP. I am not asking how to send the values, I can already do that. What I want to know is once I have the values in variables, how can I update the existing ones? Can this be done?

kerem

2026-02-28 01:25:02 +03:00

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kerem commented

2026-02-28 01:25:03 +03:00

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@tablatronix commented on GitHub (Nov 3, 2017):

You can just call begin("ssid","password") using standard esp calls, and grab the ssid and password however you want, then esp.reset().

@tablatronix commented on GitHub (Nov 3, 2017): You can just call begin("ssid","password") using standard esp calls, and grab the ssid and password however you want, then esp.reset().

kerem commented

2026-02-28 01:25:03 +03:00

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@gjt211 commented on GitHub (Nov 3, 2017):

@tablatronix, thanks for your response.
Maybe because I just woke up or I am not overly bright, I am having trouble understanding your answer.

Nowhere in my code is the call begin("ssid","password") as WiFiManager handles all that for me. So I am a little confused about adding it.
When you say "grab the ssid and password" doesn't help me, I (the ESP) already knows what the ssid & password are, but I want to change them.

There is a good chance I didn't explain my problem very well. I will try again...

The ESP is connected to (AP1) and working well
I want to connect to a different AP (AP2)
I know (AP1) ssid & password
I have received (AP2) ssid & password (via MQTT)
I now want to disconnect from AP1 and connect to AP2

As a bit of a fail-safe, my code will keep a copy of the original (AP1) ssid & password in eeprom along with a flag to say we have tried changing them. If the connect attempt to the new (AP2) fails, I will put the original (AP1) settings back and reconnect to that.

Thanks in advance.

@gjt211 commented on GitHub (Nov 3, 2017): @tablatronix, thanks for your response. Maybe because I just woke up or I am not overly bright, I am having trouble understanding your answer. Nowhere in my code is the call `begin("ssid","password")` as WiFiManager handles all that for me. So I am a little confused about adding it. When you say "grab the ssid and password" doesn't help me, I (the ESP) already knows what the ssid & password are, but I want to change them. There is a good chance I didn't explain my problem very well. I will try again... - The ESP is connected to (AP1) and working well - I want to connect to a different AP (AP2) - I know (AP1) ssid & password - I have received (AP2) ssid & password (via MQTT) - I now want to disconnect from AP1 and connect to AP2 As a bit of a fail-safe, my code will keep a copy of the original (AP1) ssid & password in eeprom along with a flag to say we have tried changing them. If the connect attempt to the new (AP2) fails, I will put the original (AP1) settings back and reconnect to that. Thanks in advance.

kerem commented

2026-02-28 01:25:03 +03:00

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@tablatronix commented on GitHub (Nov 4, 2017):

Wifimanager does not manage your sta it just calls begin using the esp stored creds

Begin saves them if persistent is true
So all you have to do it call begin with a2
And reboot

@tablatronix commented on GitHub (Nov 4, 2017): Wifimanager does not manage your sta it just calls begin using the esp stored creds Begin saves them if persistent is true So all you have to do it call begin with a2 And reboot

kerem commented

2026-02-28 01:25:03 +03:00

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@tablatronix commented on GitHub (Nov 4, 2017):

Or do a wlconnected loop and fallback to old or use the multi capability built in to esp

@tablatronix commented on GitHub (Nov 4, 2017): Or do a wlconnected loop and fallback to old or use the multi capability built in to esp

kerem commented

2026-02-28 01:25:03 +03:00

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@gjt211 commented on GitHub (Dec 6, 2017):

Just thought I would add an update to let everyone know I have this partially working.
I am using a different project, so currently I am receiving the new SSID & PSK via the UART interface.
I have a command interpreter that receives commands as follows (in the Arduino serial terminal);

ssid=new_ssid_here
psk=new_password_here

I then execute the command

restartwifi

If this command is received, my device then runs the following code

WiFi.disconnect();
    yield();
    delay(100);
    WiFi.begin(configuration.my_ssid, configuration.my_psk);
    reboot = true;
    return;

The reboot flag is tested in my main loop and runs my reboot function.
The ESP8266 then reboots and attempts connection using the updated ssid/password.

FYI: My command interpreter stores the ssid and password in EEPROM using a struct. The struct contains other stuff as well, but thats where the configuration.my_ssid and configuration.my_psk come from.

@gjt211 commented on GitHub (Dec 6, 2017): Just thought I would add an update to let everyone know I have this partially working. I am using a different project, so currently I am receiving the new SSID & PSK via the UART interface. I have a command interpreter that receives commands as follows (in the Arduino serial terminal); ``` ssid=new_ssid_here psk=new_password_here ``` I then execute the command ``` restartwifi ``` If this command is received, my device then runs the following code ``` WiFi.disconnect(); yield(); delay(100); WiFi.begin(configuration.my_ssid, configuration.my_psk); reboot = true; return; ``` The `reboot` flag is tested in my main loop and runs my reboot function. The ESP8266 then reboots and attempts connection using the updated ssid/password. _FYI: My command interpreter stores the ssid and password in EEPROM using a struct. The struct contains other stuff as well, but thats where the `configuration.my_ssid` and `configuration.my_psk` come from._

kerem commented

2026-02-28 01:25:03 +03:00

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@skx commented on GitHub (Jan 8, 2018):

Thanks for the update @gjt211. Since it is now working for you would you mind closing the issue?

@skx commented on GitHub (Jan 8, 2018): Thanks for the update @gjt211. Since it is now working for you would you mind closing the issue?

kerem commented

2026-02-28 01:25:03 +03:00

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@tablatronix commented on GitHub (Dec 18, 2018):

Thats a pretty good idea, I like the uart way of setting default creds, very useful for programming as you do not need to do it everytime, you could also load from spiffs if no ssid set, and use spiffs upload to upload fs automatically ( at least with platformio )

Should I include an example for something like this?

@tablatronix commented on GitHub (Dec 18, 2018): Thats a pretty good idea, I like the uart way of setting default creds, very useful for programming as you do not need to do it everytime, you could also load from spiffs if no ssid set, and use spiffs upload to upload fs automatically ( at least with platformio ) Should I include an example for something like this?

kerem referenced this issue

2026-02-28 01:25:48 +03:00

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kerem referenced this issue

2026-02-28 01:27:00 +03:00

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