I use this code to find chip ID. xxxxxxxxxxxx
my board : heltec lora 32 v.2
/* The true ESP32 chip ID is essentially its MAC address.*/
uint64_t chipId = 0;
void setup() {
Serial.begin(115200);
}
void loop() {
chipId=ESP.getEfuseMac();
Serial.printf(“ESP32 Chip model = %s Rev %d\n”, ESP.getChipModel(), ESP.getChipRevision());
Serial.printf(“This chip has %d cores\n”, ESP.getChipCores());
Serial.printf(“ESP32ChipID=%04X”,(uint16_t)(chipId>>32));//print High 2bytes
Serial.printf("%08X\r\n",(uint32_t)chipId);//print Low 4bytes.
delay(3000);
}