Rewind the method of reading chipid to the previous one, making it easier to query the license

Author: wangxiangwangeuse

examples/ESP32/GetChipID/GetChipID.ino

@@ -1,30 +1,16 @@
-/* The true ESP32 chip ID is essentially its MAC address.
-This sketch provides an alternate chip ID that matches 
-the output of the ESP.getChipId() function on ESP8266 
-(i.e. a 32-bit integer matching the last 3 bytes of 
-the MAC address. This is less unique than the 
-MAC address chip ID, but is helpful when you need 
-an identifier that can be no more than a 32-bit integer 
-(like for switch...case).
-
-created 2020-06-07 by cweinhofer
-with help from Cicicok */
-	
-uint32_t chipId = 0;
+/* The true ESP32 chip ID is essentially its MAC address.*/
+  
+uint64_t chipId = 0;
 
 void setup() {
-	Serial.begin(115200);
+  Serial.begin(115200);
 }
 
 void loop() {
-	for(int i=0; i<17; i=i+8) {
-	  chipId |= ((ESP.getEfuseMac() >> (40 - i)) & 0xff) << i;
-	}
-
-	Serial.printf("ESP32 Chip model = %s Rev %d\n", ESP.getChipModel(), ESP.getChipRevision());
-	Serial.printf("This chip has %d cores\n", ESP.getChipCores());
-  Serial.print("Chip ID: "); Serial.println(chipId);
-  
-	delay(3000);
-
+  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);
 }