ESP Support

Add ESP8266 Support
Add ESP32 Support
Add UniqueID8dump function
Add UniqueID8 example

Author: ricaun

README.md

@@ -1,6 +1,8 @@
 # ArduinoUniqueID
 
-This Library gets the Unique Serial ID from the AVR Microcontroller.
+This Library gets the Unique Serial ID from the AVR Microcontroller and ESP Microcontroller.
+
+# AVR Microcontroller
 
 ## Unique Serial ID - Hidden Serial Number
 
@@ -23,21 +25,55 @@ Apparently, the chip Atmega328p have a hidden serial number with 9 bytes, and ot
 | 0x0016 | Byte 8 | Byte 7 |
 | 0x0017 | Byte 9 | Byte 8 |
 
-## Dependencies
-
-This library only works on AVR Microcontroller.
-
 ## Tested Microcontroller
 
 * Atmega328pb - 10 bytes
 * Atmega328p - 9 bytes
 * Atmega2560 - 9 bytes
 * Attiny85 - 9 bytes
 
+# ESP Microcontroller
+
+ESP microcontroller has basically two versions, ESP8266 and ESP32, each one has a specific function to request the chip id. <br/>
+
+* ESP8266 - ESP.getChipId() - 4 bytes
+* ESP32 - ESP.getEfuseMac() - 6 bytes
+
+| UniqueID | ESP8266 | ESP32 |
+| :-------: | :------: | :------:|
+| Byte 0| Byte 0 | Byte 0 |
+| Byte 1| Byte 1 | Byte 1 |
+| Byte 2| Byte 2 | Byte 2 |
+| Byte 3| Byte 3 | Byte 3 |
+| Byte 4| - | Byte 4 |
+| Byte 5| - | Byte 5 |
+
+To make the variable UniqueID8 to work propably the library uses the default bytes to 0x00. <br/>
+
+| UniqueID8 | ESP8266 | ESP32 |
+| :-------: | :------: | :------:|
+| Byte 0| 0x00 | 0x00 |
+| Byte 1| 0x00 | 0x00 |
+| Byte 2| 0x00 | Byte 0 |
+| Byte 3| 0x00 | Byte 1 |
+| Byte 4| Byte 0 | Byte 2 |
+| Byte 5| Byte 1 | Byte 3 |
+| Byte 6| Byte 2 | Byte 4 |
+| Byte 7| Byte 3 | Byte 5 |
+
+## Tested Microcontroller
+
+* ESP8266 - 4 bytes
+* ESP32 - 6 bytes
+
+## Dependencies
+
+This library only supports AVR Microcontroller and ESP Microcontroller.
+
 ## Installation
 
 * Install the library by [Using the Library Manager](https://www.arduino.cc/en/Guide/Libraries#toc3)
-* **OR** by [Importing the .zip library](https://www.arduino.cc/en/Guide/Libraries#toc4) using either the [master](https://github.com/ricaun/ArduinoUniqueID/archive/1.0.3.zip) or one of the [releases](https://github.com/ricaun/ArduinoUniqueID/releases) ZIP files.
+* **OR** by [Importing the .zip library](https://www.arduino.cc/en/Guide/Libraries#toc4) using either the [master](https://github.com/ricaun/ArduinoUniqueID/archive/1.0.4.zip) or one of the [releases](https://github.com/ricaun/ArduinoUniqueID/releases) ZIP files.
 
 ## Examples
 
@@ -79,4 +115,12 @@ for(size_t i = 0; i < 8; i++)
   Serial.println(UniqueID8[i], HEX);
 ```
 
+### Method: UniqueID8dump
+
+Print the last eight hexadecimal bytes of the Unique Serial ID on the Stream.
+
+```c
+void UniqueID8dump(Stream);
+```
+
 Do you like this library? Please [star this project on GitHub](https://github.com/ricaun/ArduinoUniqueID/stargazers)!

examples/ArduinoUniqueID/ArduinoUniqueID.ino

@@ -1,7 +1,7 @@
 //
 // ArduinoUniqueID.ino
 //
-// Example shows the Serial Unique ID on the Serial Monitor.
+// Example shows the UniqueID on the Serial Monitor.
 //
 
 #include <ArduinoUniqueID.h>
@@ -10,7 +10,7 @@ void setup()
 {
 	Serial.begin(115200);
 	UniqueIDdump(Serial);
-	Serial.print("Serial Unique ID: ");
+	Serial.print("UniqueID: ");
 	for (size_t i = 0; i < UniqueIDsize; i++)
 	{
 		if (UniqueID[i] < 0x10)

examples/ArduinoUniqueID8/ArduinoUniqueID8.ino

@@ -0,0 +1,26 @@
+//
+// ArduinoUniqueID8.ino
+//
+// Example shows the last eight UniqueID on the Serial Monitor.
+//
+
+#include <ArduinoUniqueID.h>
+
+void setup()
+{
+	Serial.begin(115200);
+	UniqueID8dump(Serial);
+	Serial.print("UniqueID: ");
+	for (size_t i = 0; i < 8; i++)
+	{
+		if (UniqueID8[i] < 0x10)
+			Serial.print("0");
+		Serial.print(UniqueID8[i], HEX);
+		Serial.print(" ");
+	}
+	Serial.println();
+}
+
+void loop()
+{
+}

keywords.txt

@@ -13,6 +13,7 @@ ArduinoUniqueID	KEYWORD1
 #######################################
 
 UniqueIDdump	KEYWORD2
+UniqueID8dump	KEYWORD2
 
 #######################################
 # Constants (LITERAL1)

library.properties

@@ -1,10 +1,10 @@
 name=ArduinoUniqueID
-version=1.0.3
+version=1.0.4
 author=Luiz Henrique Cassettari
 maintainer=Luiz Henrique Cassettari <ricaun@gmail.com>
 sentence=Arduino Library to get the AVR microcontroler Unique ID / Manufacture Serial Number.
-paragraph=The ArduinoUniqueID Library use the buildin feature to select the manufacture serial number from the microcontroler. Suported / Tested microcontroler: Atmega328pb, Atmega328p, Atmega2560 & Attiny85.
+paragraph=The ArduinoUniqueID Library use the buildin feature to select the manufacture serial number from the microcontroler. Suported microcontroler: Atmega328pb, Atmega328p, Atmega2560, Attiny85, ESP8266 & ESP32.
 category=Other
 url=https://github.com/ricaun/ArduinoUniqueID
-architectures=avr
+architectures=avr, esp8266, esp32
 includes=ArduinoUniqueID.h

src/ArduinoUniqueID.cpp

@@ -5,10 +5,33 @@
 
 ArduinoUniqueID::ArduinoUniqueID()
 {
-	for(size_t i = 0; i < UniqueIDsize; i++)
+#if defined(ARDUINO_ARCH_AVR)
+	for (size_t i = 0; i < UniqueIDsize; i++)
 	{
 		id[i] = boot_signature_byte_get(0x0E + i + (UniqueIDsize == 9 && i > 5 ? 1 : 0));
 	}
+#elif defined(ARDUINO_ARCH_ESP8266)
+	uint32_t chipid = ESP.getChipId();
+	id[0] = 0;
+	id[1] = 0;
+	id[2] = 0;
+	id[3] = 0;
+	id[4] = chipid >> 24;
+	id[5] = chipid >> 16;
+	id[6] = chipid >> 8;
+	id[7] = chipid;
+
+#elif defined(ARDUINO_ARCH_ESP32)
+	uint64_t chipid = ESP.getEfuseMac();
+	id[0] = 0;
+	id[1] = 0;
+	id[2] = chipid >> 40;
+	id[3] = chipid >> 32;
+	id[4] = chipid >> 24;
+	id[5] = chipid >> 16;
+	id[6] = chipid >> 8;
+	id[7] = chipid;
+#endif
 }
 
 ArduinoUniqueID _UniqueID;

src/ArduinoUniqueID.h

@@ -6,26 +6,41 @@
 
 #include <Arduino.h>
 
-#if __AVR_ARCH__
+#if defined(ARDUINO_ARCH_AVR)
 #include <avr/boot.h>
 #ifndef SIGRD
 #define SIGRD 5
 #endif
+#elif defined(ARDUINO_ARCH_ESP8266)
+#elif defined(ARDUINO_ARCH_ESP32)
 #else
-#error "ArduinoUniqueID only works on AVR Architecture"
+#error "ArduinoUniqueID only works on AVR and ESP Architecture"
 #endif
 
+#if defined(ARDUINO_ARCH_AVR)
+
 #if defined(__AVR_ATmega328PB__)
 #define UniqueIDsize 10
 #else
 #define UniqueIDsize 9
 #endif
 
-#define UniqueID8 (_UniqueID.id + UniqueIDsize - 8)
-#define UniqueID _UniqueID.id
+#define UniqueIDbuffer UniqueIDsize
+
+#elif defined(ARDUINO_ARCH_ESP8266)
+#define UniqueIDsize 4
+#define UniqueIDbuffer 8
+#elif defined(ARDUINO_ARCH_ESP32)
+#define UniqueIDsize 6
+#define UniqueIDbuffer 8
+#endif
+
+#define UniqueID8 (_UniqueID.id + UniqueIDbuffer - 8)
+#define UniqueID (_UniqueID.id + UniqueIDbuffer - UniqueIDsize)
+
 #define UniqueIDdump(stream)                      \
 	{                                             \
-		stream.print("Serial Unique ID: ");       \
+		stream.print("UniqueID: ");       \
 		for (size_t i = 0; i < UniqueIDsize; i++) \
 		{                                         \
 			if (UniqueID[i] < 0x10)               \
@@ -36,11 +51,24 @@
 		stream.println();                         \
 	}
 
+#define UniqueID8dump(stream)                \
+	{                                        \
+		stream.print("UniqueID: ");  \
+		for (size_t i = 0; i < 8; i++)       \
+		{                                    \
+			if (UniqueID8[i] < 0x10)         \
+				stream.print("0");           \
+			stream.print(UniqueID8[i], HEX); \
+			stream.print(" ");               \
+		}                                    \
+		stream.println();                    \
+	}
+
 class ArduinoUniqueID
 {
   public:
 	ArduinoUniqueID();
-	uint8_t id[UniqueIDsize];
+	uint8_t id[UniqueIDbuffer];
 };
 
 extern ArduinoUniqueID _UniqueID;