ESP8266-WROOM-02D EEPROM issue

[pravinzende12]

Basic Infos

• This issue complies with the issue POLICY doc.
• I have read the documentation at readthedocs and the issue is not addressed there.
• I have tested that the issue is present in current master branch (aka latest git).
• I have searched the issue tracker for a similar issue.
• If there is a stack dump, I have decoded it.
• I have filled out all fields below.

Platform

• Hardware: ESP-WROOM-02D
• Core Version: [latest git hash or date]
• Development Env: Arduino IDE
• Operating System: Windows

Settings in IDE

• Module: ESP-WROOM-02D
• Flash Mode: [Standard SPI, DIO (Dual I/O), DOUT (Dual)]
  Output), QIO (Quad I/O) and QOUT (Quad Output)]
• Flash Size: [2-MB SPI flash]
• lwip Variant: [v1.4|v2 Lower Memory|Higher Bandwidth]
• Reset Method: [ck|nodemcu]
• Flash Frequency: [40Mhz]
• CPU Frequency: [80Mhz|160MHz]
• Upload Using: [OTA|SERIAL]
• Upload Speed: [115200|other] (serial upload only)

Problem Description

After writing on memory by SSID & Password for Wi-fi
when there is power off module gets reset & flsh gets
erased with SSID & Password any one having idea for this

Edit by @devyte : attached zip files removed.
Please include a MCVE as part of the post.

MCVE Sketch

Code is attached

#include "main.h"


#define CREDENTIALS_FLAG               1
#define CREDENTIALS_START_ADDRESS      2


bool credentialsAvailableFlag = false;


typedef struct{
  char ssid[32];
  char password[64];
  char qrCode[20];
}UserCredentials_t;


UserCredentials_t wifiCredentials;


WiFiServer server(8080);      
WiFiClient client;

void setup()
{
  EEPROM.begin(512);                                                            //EEPROM initialized
  Serial.begin(11520);                                                          //Serial port for debug
  Serial.println("Hindware Test program for EEPROM issue - 19112020");  
  if(EEPROM.read(CREDENTIALS_FLAG) == 1)                                        //will read credentials flag at power on 
  {                                                                               //if 1 then credentials available
    credentialsAvailableFlag = true;                                              // if not 1 then credentials not available
  } 
  else
  {
    credentialsAvailableFlag = false;
  }
}

void loop()
{
  /*
   * if credentials available then read the credentials from EEPROM
   * if not available then initialize hotspot mode and wait for credentials from user through TCP
   */
  if(credentialsAvailableFlag)                    
  {
    ReadCredentialsFromEeprom();                                                
    ConnectToRouter();
  }
  else
  {
    SetHotspot();
    WaitForCredentials();
  }
}


void ConnectToRouter(void)
{
   WiFi.mode(WIFI_STA);                                           //will connect to the router whose credentials have been read from EEPROM
   WiFi.begin(wifiCredentials.ssid,wifiCredentials.password);
   Serial.print("Connecting to ");
   Serial.println(wifiCredentials.ssid);
}

void ReadCredentialsFromEeprom(void)
{
  EEPROM.get(CREDENTIALS_START_ADDRESS,wifiCredentials);    // reading credentials from EEPROM and savind it in struct
}



void SetHotspot(void)
{
    WiFi.mode(WIFI_AP);                       //Initialize Hotspot with crendentials as SSID: HotspotName | Paasword: password 
    IPAddress local_IP(192, 168, 1, 1);
    IPAddress gateway(192, 168, 1, 1);
    IPAddress subnet(255, 255, 255, 0);
    WiFi.softAPConfig (local_IP, gateway, subnet);
    WiFi.softAP("HotspotName", "password" , 1, false , 1);
    server.begin();
}

void WaitForCredentials(void)
{
  while(client.connected())     //if client connected at 192.168.1.1:8080
  {
    if (client.available())
    {
      String tempBuffWifiDirect = client.readStringUntil('\r\n\r\n');              //will read data printed on local IP
      Serial.println(tempBuffWifiDirect);
                                                                                // packet recieved {"SSID":"userssid","Password":"userpassword","QRcodeSerial":"12345"}
      StaticJsonBuffer<1000> jsonBuffer;                                          //parse the received JSON
      JsonObject& root = jsonBuffer.parseObject(tempBuffWifiDirect);
      
      if (root.success())          //if credentials JSON  parsing is Successful
      {
        const char* ssidTempBuff = "";
        const char* pwdTempBuff = "";
        const char* qrCodeSerial = "";
        ssidTempBuff = root["SSID"];
        pwdTempBuff = root["Password"];
        qrCodeSerial = root["QRcodeSerial"];
        Serial.println("Received Credentials:");
        Serial.println("SSID: " + (String)ssidTempBuff);
        Serial.println("Password: " + (String)pwdTempBuff);
        Serial.println("QRCode: " + (String)qrCodeSerial);
        memset(wifiCredentials.ssid, 0, sizeof(wifiCredentials.ssid));
        memset(wifiCredentials.password, 0, sizeof(wifiCredentials.password));
        memset(wifiCredentials.qrCode, 0 , sizeof(wifiCredentials.qrCode));
        strcpy(wifiCredentials.ssid, ssidTempBuff);
        strcpy(wifiCredentials.password, pwdTempBuff);
        strcpy(wifiCredentials.qrCode, qrCodeSerial);
        SetCredentialsToEeprom();              //save credentials to EEPROM
        credentialsAvailableFlag = true;        // set flad to read from EEPROM and connect to router
      }  
    }
  } 
}

void SetCredentialsToEeprom(void)
{
  EEPROM.put(CREDENTIALS_START_ADDRESS,wifiCredentials); //save credentials
  EEPROM.write(CREDENTIALS_FLAG,(int)1);                  //save credentials flag 1 so it connecets to router from next power on

  EEPROM.commit();    //commit to EEPROM
}

[devyte]

@pravinzende12 please don't attach zip files and add your MCVE directly to your post above.

[pravinzende12]

ok attached MCVE file

[Tech-TX]

Two issues in 2 days with corrupt EEPROM on a WROOM-02D, and neither of them apparently read #6551

Sounds like a school project.