Startertutorials Blog
Tutorials and articles related to programming, computer science, technology and others.
Subscribe to Startertutorials.com's YouTube channel for different tutorial and lecture videos.

Categories: Internet of Things. 1 Comment on Programming Raspberry Pi with Python
0
(0)

In this article we will look at Programming Raspberry Pi with Python programming language.

 

LED blink program

The schematic or connection diagram for blinking a LED using Raspberry Pi is as shown below.

 


Subscribe to our monthly newsletter. Get notified about latest articles, offers and contests.


Programming Raspberry Pi with Python - LED blink program

 

Code for blinking and LED using Raspberry Pi given below:

import RPi.GPIO as GPIO

import time

led_pin = 17

GPIO.setmode(GPIO.BCM)

GPIO.setup(led_pin, GPIO.OUT)

while True:

GPIO.output(led_pin, GPIO.HIGH)

time.sleep(1)

GPIO.output(led_pin, GPIO.LOW)

time.sleep(1)

GPIO.cleanup( )

 

DHT11 Sensor

We need to install two libraries/software for making DHT11 sensor work with Raspberry Pi 4. Open a terminal and type the following commands.

 

pip3 install adafruit-circuitpython-dht

sudo apt-get install libgpiod2

 

The first command installs Adafruit’s DHT library that works with CircuitPython. The second command is a library for accessing the GPIO pins of Raspberry Pi.

 

The schematic or connections diagram for connecting DHT 11 sensor with Raspberry Pi is given below.

 

Programming Raspberry Pi with Python - DHT11 sensor program

 

The code for sensing temperature and humidity using DHT 11 sensor using Raspberry Pi 4 is given below.

import time

import board

import adafruit_dht

dhtDevice = adafruit_dht.DHT11(board.D17)

while True:

try:

# Print the values to the serial port

temperature_c = dhtDevice.temperature

temperature_f = temperature_c * (9 / 5) + 32

humidity = dhtDevice.humidity

print(“Temp: {:.1f} F / {:.1f} C    Humidity: {}% “.format(temperature_f, temperature_c,          humidity))

except RuntimeError as error:

# Errors happen fairly often, DHT’s are hard to read, just keep going

print(error.args[0])

time.sleep(2.0)

continue

except Exception as error:

dhtDevice.exit()

raise error

 

time.sleep(2.0)

 

 

How useful was this post?

Click on a star to rate it!

We are sorry that this post was not useful for you!

Let us improve this post!

Tell us how we can improve this post?

Suryateja Pericherla

Suryateja Pericherla, at present is a Research Scholar (full-time Ph.D.) in the Dept. of Computer Science & Systems Engineering at Andhra University, Visakhapatnam. Previously worked as an Associate Professor in the Dept. of CSE at Vishnu Institute of Technology, India.

He has 11+ years of teaching experience and is an individual researcher whose research interests are Cloud Computing, Internet of Things, Computer Security, Network Security and Blockchain.

He is a member of professional societies like IEEE, ACM, CSI and ISCA. He published several research papers which are indexed by SCIE, WoS, Scopus, Springer and others.

1 Comment

You can follow any responses to this entry through the RSS 2.0 feed.

Nice and useful post author. Thank you. keep it up.

Leave a Reply

Your email address will not be published. Required fields are marked *