DII
DevHeads IoT Integration Server•6mo ago
Camila_99$$

What does the error "Core dump data check failed" mean on the ESP32 Super Mini board?

Hello, I am testing the ESP32 Super Mini board. The code compiles fine, but I get this error message: 
E (172) esp_core_dump_flash: Core dump data check failed:
E (172) esp_core_dump_flash: Core dump data check failed:
What could be causing this error? It doesn't happen if I test another program. Additionally, the serial monitor doesn't seem to display anything. Is there something I should know? Here is the program I am testing: 
#include <WiFi.h>

const int ledPin2 = 2;
const char* ssid = "freebox_EGOOJV";
const char* password = "*****";

void get_network_info(){
    if(WiFi.status() == WL_CONNECTED) {
        Serial.print("[*] Network information for ");
        Serial.println(ssid);

        Serial.println("[+] BSSID : " + WiFi.BSSIDstr());
        Serial.print("[+] Gateway IP : ");
        Serial.println(WiFi.gatewayIP());
        Serial.print("[+] Subnet Mask : ");
        Serial.println(WiFi.subnetMask());
        Serial.println((String)"[+] RSSI : " + WiFi.RSSI() + " dB");
        Serial.print("[+] ESP32 IP : ");
        Serial.println(WiFi.localIP());
    }
}

void setup(){
    Serial.begin(115200);
    delay(1000);

    WiFi.begin(ssid, password);
    Serial.println("\nConnecting");

    while(WiFi.status() != WL_CONNECTED){
        Serial.print(".");
        delay(100);
    }

    Serial.println("\nConnected to the WiFi network");
    get_network_info();
    pinMode(ledPin2, OUTPUT);
}

void loop(){
  delay(200);
  digitalWrite(ledPin2, 1);
  delay(200);
  digitalWrite(ledPin2, 0);
}
#include <WiFi.h>

const int ledPin2 = 2;
const char* ssid = "freebox_EGOOJV";
const char* password = "*****";

void get_network_info(){
    if(WiFi.status() == WL_CONNECTED) {
        Serial.print("[*] Network information for ");
        Serial.println(ssid);

        Serial.println("[+] BSSID : " + WiFi.BSSIDstr());
        Serial.print("[+] Gateway IP : ");
        Serial.println(WiFi.gatewayIP());
        Serial.print("[+] Subnet Mask : ");
        Serial.println(WiFi.subnetMask());
        Serial.println((String)"[+] RSSI : " + WiFi.RSSI() + " dB");
        Serial.print("[+] ESP32 IP : ");
        Serial.println(WiFi.localIP());
    }
}

void setup(){
    Serial.begin(115200);
    delay(1000);

    WiFi.begin(ssid, password);
    Serial.println("\nConnecting");

    while(WiFi.status() != WL_CONNECTED){
        Serial.print(".");
        delay(100);
    }

    Serial.println("\nConnected to the WiFi network");
    get_network_info();
    pinMode(ledPin2, OUTPUT);
}

void loop(){
  delay(200);
  digitalWrite(ledPin2, 1);
  delay(200);
  digitalWrite(ledPin2, 0);
}
Solution:
Hi camila, Since the serial monitor displays nothing, i think it is incorrect baud rate settings or the absence of Serial.begin(115200); in setup(). Also, do a delay after Serial.begin before calling other functions...
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4 Replies
Camila_99$$
Camila_99$$•6mo ago
attachment 0
Mr_UJ 🔋
Mr_UJ 🔋•6mo ago
@Camila_99$$ make sure you have selected correct board
Solution
wafa_ath
wafa_ath•6mo ago
Hi camila, Since the serial monitor displays nothing, i think it is incorrect baud rate settings or the absence of Serial.begin(115200); in setup(). Also, do a delay after Serial.begin before calling other functions
Camila_99$$
Camila_99$$•6mo ago
Hi @wafa_ath I already have Serial.begin(115200); in the setup() function, but I didn't have a delay after it. I'll try adding a delay to see if that helps with the serial monitor issue.

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