Thanks for sharing.
Regards,
Sara

auto stringhexcode = Network.macAddress();
Serial.println(“Uppercase MAC address=”);
stringhexcode.toUpperCase();
Serial.println(stringhexcode);

Do you have the latest version of the ESP32 core installed?
Go to Tools > Boards > Boards Manager > Searvh for ESP32 and check the version you have installed.

Regards,
Sara

Hi Sara, thanks for answer to this old topic.
Using Wemos Lolin32 (board with embeded display
I tried with other ESP32 board, same.

Laurent

Hi.
I just tried compiling the code and it is working as expected.

Which board are you selecting in Tools > Board?

Regards,
Sara

#include “WiFi.h”

void setup() {
// Initialize serial communication at 115200 baud rate
Serial.begin(115200);
delay(1000); // Optional delay for stability

// Set Wi-Fi to station mode and disconnect from any access point
WiFi.mode(WIFI_STA);
WiFi.disconnect();
delay(100); // Short delay to ensure Wi-Fi is in station mode

// Print the MAC address of the ESP32
Serial.println(“ESP32 MAC Address: “);
Serial.println(WiFi.macAddress());
}

void loop() {
// Empty loop
}

I think you do great Work

I have the Arduino Nano ESP32 for witch I tried to get the MAC Address, It didn’t work with your code so after several tries I changed It a bit.

Now It works and I’m able to get the MAC Address of my Board, below you can find the changes in the Code (Look for Changed).

#include <WiFi.h>
#include <esp_wifi.h>

void readMacAddress(){
uint8_t baseMac[6];
esp_err_t ret = esp_wifi_get_mac(WIFI_IF_STA, baseMac);
if (ret == ESP_OK) {
Serial.printf(“%02x:%02x:%02x:%02x:%02x:%02x\n”,
baseMac[0], baseMac[1], baseMac[2],
baseMac[3], baseMac[4], baseMac[5]);
} else {
Serial.println(“Failed to read MAC address”);
}
}

void setup(){
Serial.begin(9600);

WiFi.mode(WIFI_STA);
//WiFi.STA.begin();
WiFi.begin();   //I got an error on WiFi.STA.begin(); so I changed that to WiFi.begin();
delay(1000);    //Changed
Serial.print(“[DEFAULT] ESP32 Board MAC Address: “);
delay(1000);    //Changed
readMacAddress();
}

void loop(){

}

Best regards,

Martin

void setup(){
Serial.begin(115200);
Serial.print(“\Default ESP32 MAC Address: “);
Serial.println(Network.macAddress());
}

void loop(){
}

me_no_dev expressif / arduino esp32 github comment April 14

Sorry for bothering @Sara santos
I’m implementing ESP-NOW for my project.
I want to send 4 analog inputs simultaneously to slave board, does ESP32 master is capable of transmitting this rate of data? According to the 250Mb/s limitation.

Best wishes