ESP8266产品ID

ESP.getChipId)

　　

https://github.com/espressif/arduino-esp32/blob/master/libraries/ESP32/examples/ChipID/GetChipID/GetChipID.ino

uint64_t chipid;  

void setup) {
	Serial.begin115200);
}

void loop) {
	chipid=ESP.getEfuseMac);//The chip ID is essentially its MAC addresslength: 6 bytes).
	Serial.printf"ESP32 Chip ID = %04X",uint16_t)chipid>>32));//print High 2 bytes
	Serial.printf"%08X
",uint32_t)chipid);//print Low 4bytes.

	delay3000);

}