diff --git a/module00/ex02/Makefile b/module00/ex02/Makefile
new file mode 100644
index 0000000..40e9cb4
--- /dev/null
+++ b/module00/ex02/Makefile
@@ -0,0 +1,43 @@
+# frequency of the CPU (in Hz)
+F_CPU = 16000000UL
+TARGET = main
+CC = avr-gcc
+
+AVRGCC_MCU_TYPE = atmega328p
+AVRDUDE_MCU_TYPE = m328p
+BAUD_RATE = 115200
+SERIAL_PORT = /dev/ttyUSB0
+PROGRAMMER_ID = arduino
+DUMP_ORI = ../../ressources/dump_atmega328p_ori.hex
+
+
+all: hex flash
+
+
+hex: $(TARGET).hex
+
+
+# https://gcc.gnu.org/onlinedocs/gcc/AVR-Options.html
+$(TARGET).bin: $(TARGET).c
+	$(CC) -mmcu=$(AVRGCC_MCU_TYPE) -D F_CPU=$(F_CPU) $(TARGET).c -o $(TARGET).bin
+
+
+# https://linux.die.net/man/1/avr-objcopy
+$(TARGET).hex: $(TARGET).bin
+	avr-objcopy -O ihex $(TARGET).bin $(TARGET).hex
+
+
+# AVR Downloader/UploaDEr https://avrdudes.github.io/avrdude (v6.3 https://download-mirror.savannah.gnu.org/releases/avrdude/avrdude-doc-6.3.pdf)
+flash:
+	avrdude -p $(AVRDUDE_MCU_TYPE) -c $(PROGRAMMER_ID) -b $(BAUD_RATE) -P $(SERIAL_PORT) -U flash:w:$(TARGET).hex
+
+
+restore:
+	avrdude -p $(AVRDUDE_MCU_TYPE) -c $(PROGRAMMER_ID) -b $(BAUD_RATE) -P $(SERIAL_PORT) -U flash:w:$(DUMP_ORI)
+
+
+clean:
+	rm -f main.hex main.bin
+
+
+.PHONY : all clean hex flash restore
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diff --git a/module00/ex02/main.c b/module00/ex02/main.c
new file mode 100644
index 0000000..fe04856
--- /dev/null
+++ b/module00/ex02/main.c
@@ -0,0 +1,41 @@
+#include <avr/io.h>
+
+#define SET(REGISTER, BIT)		REGISTER |= 1 << BIT
+#define CLEAR(REGISTER, BIT)	REGISTER &= ~(1 << BIT)
+#define TEST(REGISTER, BIT)		REGISTER & 1 << BIT
+#define TOGGLE(REGISTER, BIT)	REGISTER ^= 1 << BIT
+
+#define D1 0
+#define D2 1
+#define D3 2
+#define D4 4
+
+int main()
+{
+    // DDRx : select direction of the pin
+    //      - 1 = output (pull-up off)
+    //      - 0 = input
+    // PORTx :
+    //      if DDRx = 1 (output mode) :
+    //      - 1 = HIGH (5V)
+    //      - 0 = LOW (0V)
+    //      if DDRx = 0 (input mode) : 
+    //      - 1 = pull-up on
+    //      - 0 = pull-up off
+    // PINx : 
+
+
+    SET(DDRB, D1);		// make PB0 as OUTPUT (pullup is off)
+    CLEAR(PORTB, D1);	// make PB0 as HIGH (LED turns ON)
+
+    // SET(DDRB, D2);		// make PB1 as OUTPUT (pullup is off)
+    // CLEAR(PORTB, D2);	// make PB1 as LOW (LED turns OFF)
+
+    // CLEAR(DDRB, D3);		// make PB2 as INPUT
+    // SET(PORTB, D3);		// make PB2 pullup on
+
+    // CLEAR(DDRB, D4);		// make PB4 as INPUT
+    // CLEAR(PORTB, D4);	// make PB4 pullup off
+
+    return 0;
+}
\ No newline at end of file