Problem with preference.h when using S3 v0.2 chip

[gylim78]

Hi All,

I am having a problem after my new shipment of S3 chips that came are now ver 0.2.

I have a feature in my code that will basically enter into AP mode and serve up a webpage that will allow a user to change configuration settings. This basically uses the preferences.h and webserver.h library.

However, when I “save” the settings, it does not actually save and when it reads it again, it is still the old value.

The interesting thing is that when I use the same code on an earlier board which is V0.1 of the S3 chip, it works without any problem.

The other thing that I have found is that here is some conflict between the webserver library and the preference.h library because when I remove the routine of going through the webserver, then it will work.

So if I do something like this in the setup routine, it will work.

Code: [Select all] [Expand/Collapse]

1. String ssid = "IZEEM_2G";
2. String ssid = "12345678";
3. StoreData("ssid",ssid);
4. StoreData("wifi_password",wifi_password);
5.  
6. void StoreData(const char* key, const String val) {
7.   Serial.print("Storing : ");
8.   Serial.println(val);
9.   preferences.begin(MEM_ID,false);
10.   size_t tmp = preferences.putString(key, val);
11.   Serial.println(tmp);
12.   preferences.end();
13. }

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But when I use the webserver to get the value, this code does not save the value.

Code: [Select all] [Expand/Collapse]

1. void APconfig::handleSubmit(){
2.   String response_success="<h1>Success</h1>";
3.   response_success +="<h2>Set the device to the correct ID and reboot</h2>";
4.  
5.   String response_error="<h1>Error</h1>";
6.   response_error +="<h2><a href='/config'>Go back</a>to try again";
7.  
8.   String ssid = String(server.arg("ssid"));
9.   String wifi_password = String(server.arg("wifi_password"));
10.  
11.   StoreData("ssid",ssid);
12.   StoreData("wifi_password",wifi_password);
13.  
14.   server.send(200, "text/html", response_success);
15. }

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The output on the serial monitor shows the correct length of the string from the code
size_t tmp = preferences.putString(key, val);
Serial.println(tmp);

So I get something like this from the Serial monitor
IZEEM_2G
12345678
Storing : IZEEM_2G
8
Storing : 12345678
8

So it looks like the data was "saved" correctly. But when I reset the board, it will still read the old value that was previously saved.

Does anyone have any idea or have had the same issue?

[lbernstone]

By version do you mean the new chips are ESP32-S3-WROOM-2, or they are a different ECO version (which you would only see in the chip info). WROOM-2 uses OPI flash, so make sure to select the correct flash speed for your chip in the board options.