diff --git a/Practical/Assignment-1/IoT - Codes-1.py b/Practical/Assignment-1/IoT - Codes-1.py
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+++ b/Practical/Assignment-1/IoT - Codes-1.py	
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+"""
+THIS CODE HAS BEEN TESTED ON RASPBERRY PI 3B AND IS FULLY OPERATIONAL.
+
+Problem Statement: Understanding the connectivity of Raspberry-Pi / Arduino with IR sensor. Write an application to detect obstacle and notify user using LEDs.
+
+Code from InternetOfThingsAndEmbeddedSystems (SPPU - Third Year - Computer Engineering - Content) repository on KSKA Git: https://git.kska.io/sppu-te-comp-content/InternetOfThingsAndEmbeddedSystems
+"""
+
+# BEGINNING OF CODE
+# SINGLE LED ON/OFF
+import RPi.GPIO as GPIO
+import time
+GPIO.setmode(GPIO.BCM)
+GPIO setwarnings(False)
+GPIO.setup(12,GPIO.OUT)
+try:
+  while True:
+      print(“LED ON”)
+      GPIO.output(12,GPIO.HIGH)
+      time.sleep(1)
+      print(“LED OFF”)
+      GPIO.output(12,GPIO.LOW)
+      time.sleep(1)
+except:
+  GPIO.cleanup()
+
+##########
+
+# TWO LEDs ON/OFF
+import RPi.GPIO as GPIO
+import time
+GPIO.setmode(GPIO.BCM)
+GPIO setwarnings(False)
+GPIO.setup(12,GPIO.OUT)
+GPIO.setup(19,GPIO.OUT)
+try:
+  while True:
+      print(“LED ON”)
+      GPIO.output(12,GPIO.HIGH)
+      GPIO.output(19,GPIO.HIGH)
+      time.sleep(1)
+      print(“LED OFF”)
+      GPIO.output(12,GPIO.LOW)
+      GPIO.output(19,GPIO.LOW)
+      time.sleep(1)
+except:
+  GPIO.cleanup()
+
+##########
+
+# BUZZER WITH ONE LED ON/OFF
+import RPi.GPIO as GPIO
+import time
+GPIO.setmode(GPIO.BCM)
+GPIO.setwarnings(False)
+GPIO.setup(12,GPIO.OUT)
+GPIO.setup(19,GPIO.OUT)
+try:
+  while True:
+    print("LED Buzzer ON")
+    GPIO.output(12,GPIO.HIGH)
+    GPIO.output(19,GPIO.HIGH)
+    time.sleep(1)
+    print("LED & Buzzer OFF")
+    GPIO.output(12,GPIO.LOW)
+    GPIO.output(19,GPIO.LOW)
+    time.sleep(1)
+except:
+  GPIO.cleanup()
+
+##########
+# END OF CODE