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Can anyone tell me where/how the credentials (ssid, password) are stored for esp32?
A little googling suggests this is done by wifi library but it is not clear. I could not find anything in this code to suggest where they come from once stored.
I tried the following (using preferences library) but came up blank. Either this is not the correct method of the variable names are not correct. Any guidance would be helpful as I would like to use the same or similar method for some other parameters for a project.
They are stored in NVS by ESP32, you can read them using the WM funcs
// check if the module has a saved ap to connect toboolgetWiFiIsSaved();
// helper to get saved password, if persistent get stored, else get current if connected
String getWiFiPass(bool persistent = true);
// helper to get saved ssid, if persistent get stored, else get current if connected
String getWiFiSSID(bool persistent = true);
But they are only available when wifi is init on the esp32, so you have to start wifi first.
set .mode(STA) etc.
I have open issues researching how to get them without turning wifi on.
Can anyone tell me where/how the credentials (ssid, password) are stored for esp32?
A little googling suggests this is done by wifi library but it is not clear. I could not find anything in this code to suggest where they come from once stored.
I tried the following (using preferences library) but came up blank. Either this is not the correct method of the variable names are not correct. Any guidance would be helpful as I would like to use the same or similar method for some other parameters for a project.
`
#include<Preferences.h>
Preferences preferences;
String ssid;
String password;
void setup {
preferences.begin("credentials", false);
ssid = preferences.getString("ssid", "");
password = preferences.getString("password", "");
Serial.println(ssid);
Serial.println(password);
}
`
Thanks,
Pete.
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