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IoT P2

The document outlines a practical exercise for displaying LED patterns using a Raspberry Pi, focusing on connecting components and writing Python scripts. It includes a step-by-step guide for hardware setup and sample code to implement various LED patterns like blinking and chasing. The aim is to provide foundational knowledge for more complex IoT and automation projects.

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triveneebadgujar28
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7 views4 pages

IoT P2

The document outlines a practical exercise for displaying LED patterns using a Raspberry Pi, focusing on connecting components and writing Python scripts. It includes a step-by-step guide for hardware setup and sample code to implement various LED patterns like blinking and chasing. The aim is to provide foundational knowledge for more complex IoT and automation projects.

Uploaded by

triveneebadgujar28
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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Pritee Badgujar Internet of Things (IoT)

Practical - 2
Aim: Displaying different LED patterns with Raspberry Pi.
Objective:
 Connect electronic components safely to the
Raspberry Pi's GPIO pins.
 Write Python scripts to control the state of the LEDs
(on/off).
 Implement various LED patterns, such as simple blinking,
chasing, etc,
 Gain foundational knowledge for more complex IoT (Internet
of Things) and automation projects.

Materials Required:
 Raspberry Pi (e.g., Raspberry Pi 3 B+)
 Jumper Wires
 LEDs (Light Emitting Diodes) board

Step 1: Hardware Setup (Wiring)

S.No Rsp Pi GPIO Rsp Pi PIN Board Pin


number number Name

1 GPIO 2 PIN 3 D0 (1)

2 GPIO 3 PIN 5 D1 (2)

3 GPIO 4 PIN 7 D2 (3)

4 GPIO 17 PIN 11 D3 (4)

Chalk and Duster


Pritee Badgujar Internet of Things (IoT)

5 GPIO 27 PIN 13 D4 (5)

6 GPIO 22 PIN 15 D5 (6)

7 GPIO 10 PIN 19 D6 (7)

8 GPIO 9 PIN 21 D7 (8)

9 GND PIN 6 GND (0)

Step 2: Create Python file “Practical2.py” and


write the following code:
import RPi.GPIO as GPIO
import time

# Define GPIO pins connected to D0–D7


led_pins = [2, 3, 4, 17, 27, 22, 10, 9]

GPIO.setmode(GPIO.BCM)

# Setup all pins as output


for pin in led_pins:
GPIO.setup(pin, GPIO.OUT)
GPIO.output(pin, GPIO.LOW)

# Basic patterns
def all_on():
for pin in led_pins:

Chalk and Duster


Pritee Badgujar Internet of Things (IoT)

GPIO.output(pin, GPIO.HIGH)

def all_off():
for pin in led_pins:
GPIO.output(pin, GPIO.LOW)

def blink_all(times=3, delay=0.5):


for _ in range(times):
all_on()
time.sleep(delay)
all_off()
time.sleep(delay)

def chasing(delay=0.1):
for pin in led_pins:
GPIO.output(pin, GPIO.HIGH)
time.sleep(delay)
GPIO.output(pin, GPIO.LOW)

def ping_pong(delay=0.1):
for pin in led_pins + led_pins[::-1]:
GPIO.output(pin, GPIO.HIGH)
time.sleep(delay)
GPIO.output(pin, GPIO.LOW)

# Run test patterns


try:
while True:
blink_all()

Chalk and Duster


Pritee Badgujar Internet of Things (IoT)

chasing()
ping_pong()
except KeyboardInterrupt:
print("Exiting...")
finally:
all_off()
GPIO.cleanup()

run the file.

Chalk and Duster

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