Cannot find MAC address of ESP32-S3 Think Plus

Development Boards ESP32
1

Hi, I have just received the ESP32-S3 Thing Plus board. When I tried the following code (which worked on Adafruit ESP32-S3 Feather) on it, nothing is printed on the Serial Monitor. Tried both “ESP32S3 Dev Module” and “Sparkfun ESP32-S3 Think Plus” but none of them worked. Could you please let me know what is wrong? Tried both Windows 11 PC and Mac.

#include "WiFi.h"




void setup(){

  delay(5000);

  Serial.begin(115200);

  

  // Set WiFi to Station mode to get the MAC address

  WiFi.mode(WIFI_STA);

  

  // Print the MAC Address to the Serial Monitor

  Serial.print("ESP32-S3 MAC Address: ");

  Serial.println(WiFi.macAddress());

}




void loop(){

  // Empty

}
2

Try this post, it sounds like you have the same problem with nothing printing on the serial monitor.

3

When choosing the Board as “ESP32-S3 Dev Module” and enabling “USB CDC On Boot”, it gave me:

ESP32-S3 MAC Address: 00:00:00:00:00:00

Then, I have to change the setup() routine to:

void setup(){

  delay(5000);
  Serial.begin(115200);

  // Set WiFi to Station mode to get the MAC address

  WiFi.begin();
  WiFi.mode(WIFI_MODE_APSTA);
  WiFi.macAddress();

  // Print the MAC Address to the Serial Monitor
  Serial.print("ESP32-S3 MAC Address: ")

  Serial.println(WiFi.macAddress());

}

for it to work.

Why the program in the original post works under Adafruit Feather ESP32-S3 but not under Sparkfun ESP32-S3 Think Plus? They both use the same ESP32-S3.

4

Did you select the other settings too?

" “ESP32S3 Dev Module” for your board with the following settings:

  • USB Mode: Hardware CDC and JTAG
  • USB CDC on Boot: Enabled
  • Upload Mode: UART0 / Hardware CDC
  • PSRAM: QSPI PSRAM"
5

Thanks for checking. No, I just chose between the two board types. There is no date in that article. I thought it were an old one because Sparkfun ESP32-S3 Think Plus is now included in the list of boards. OK. From now on, I choose “ESP32S3 Dev Module” rather than"Sparkfun ESP32-S3”.