“Preferences.h” doesn't work on ESP32 S3

[Someijam]

Board

ESP32S3 Dev Module

Device Description

DevKitC-1, N32R8V, just a single board.

Hardware Configuration

Only connected to the computer without anything else. All GPIOs are free.

Version

v2.0.9

IDE Name

Arduino IDE 2.1.1

Operating System

macOS Ventura 13.4.1（M1 chip）

Flash frequency

80 MHz

PSRAM enabled

no

Upload speed

921600

Description

Try a simple example "StartCounter"(libraries/Preferences/examples/StartCounter/StartCounter.ino) on my board. Code as follows:

/*
 ESP32 startup counter example with Preferences library.

 This simple example demonstrates using the Preferences library to store how many times
 the ESP32 module has booted. The Preferences library is a wrapper around the Non-volatile
 storage on ESP32 processor.

 created for arduino-esp32 09 Feb 2017
 by Martin Sloup (Arcao)
*/

#include <Preferences.h>

Preferences preferences;

void setup() {
  Serial.begin(115200);
  Serial.println();

  // Open Preferences with my-app namespace. Each application module, library, etc
  // has to use a namespace name to prevent key name collisions. We will open storage in
  // RW-mode (second parameter has to be false).
  // Note: Namespace name is limited to 15 chars.
  preferences.begin("my-app", false);

  // Remove all preferences under the opened namespace
  //preferences.clear();

  // Or remove the counter key only
  //preferences.remove("counter");

  // Get the counter value, if the key does not exist, return a default value of 0
  // Note: Key name is limited to 15 chars.
  unsigned int counter = preferences.getUInt("counter", 0);

  // Increase counter by 1
  counter++;

  // Print the counter to Serial Monitor
  Serial.printf("Current counter value: %u\n", counter);

  // Store the counter to the Preferences
  preferences.putUInt("counter", counter);
  Serial.print("Free:");
  Serial.println(preferences.freeEntries());

  // Close the Preferences
  preferences.end();

  // Wait 3 seconds
  Serial.println("Restarting in 3 seconds...");
  delay(3000);

  // Restart ESP
  ESP.restart();
}

void loop() {}

I changed 10 seconds to 3 seconds it doesn't matter I think. After I uploaded, the counter value is always "1". However, it was supposed to add "1" everytime, instead of keeping "1".
This is just a simple example. Thus, more complex things like this, too. "putString" doesn't save the string you provided, etc.

Sketch

...
  unsigned int counter = preferences.getUInt("counter", 0);
  counter++;
  Serial.printf("Current counter value: %u\n", counter);
  preferences.putUInt("counter", counter);
...

Debug Message

ESP-ROM:esp32s3-20210327
Build:Mar 27 2021
rst:0xc (RTC_SW_CPU_RST),boot:0x8 (SPI_FAST_FLASH_BOOT)
Saved PC:0x42022fd2
SPIWP:0xee
Octal Flash Mode Enabled
For OPI Flash, Use Default Flash Boot Mode
mode:SLOW_RD, clock div:1
load:0x3fce3808,len:0x3ac
load:0x403c9700,len:0x9b4
load:0x403cc700,len:0x28d8
entry 0x403c98bc

Current counter value: 1
Free:628
Restarting in 3 seconds...
�ESP-ROM:esp32s3-20210327
Build:Mar 27 2021
rst:0xc (RTC_SW_CPU_RST),boot:0x8 (SPI_FAST_FLASH_BOOT)
Saved PC:0x42022fd2
SPIWP:0xee
Octal Flash Mode Enabled
For OPI Flash, Use Default Flash Boot Mode
mode:SLOW_RD, clock div:1
load:0x3fce3808,len:0x3ac
load:0x403c9700,len:0x9b4
load:0x403cc700,len:0x28d8
entry 0x403c98bc

Current counter value: 1
Free:628
Restarting in 3 seconds...
//output loops like this

Other Steps to Reproduce

1. Just verify the code and upload, then open the monitor, "Current counter value" is always "1", nothing special.

2. If you check with "int pStatus = preferences.putUInt("counter", counter);", and the "pStatus" is "4", which is the right return value.

3. My friend who uses Windows 10 and uses the same ESP32S3 board also meet the problem.

4. I tested the code on "wokwi.com"(an online simulator) but it works normally...(God, That's weird?)

I have checked existing issues, online documentation and the Troubleshooting Guide

• I confirm I have checked existing issues, online documentation and Troubleshooting guide.

[VojtechBartoska]

@PilnyTomas Can you please help with validating this issue? Thanks

[lbernstone]

Works for me (in Arduino 1.8.16).
Make sure you have the correct flash settings (OPI)

[Someijam]

Works for me (in Arduino 1.8.16).

Thank you very much!!!😲
After I changed the "Flash Mode" to "OPI 80MHz" in the menu, it works!