In this tutorial video, we'll show you how to create a simple HTTP server using the Raspberry Pi Pico W, a powerful microcontroller board. With its built-in Wi-Fi capability, the Pico W allows us to set up a basic web server and serve web pages over a local network.
Whether you're a beginner or an experienced Raspberry Pi user, this step-by-step guide will help you get started with creating your own HTTP server on the Raspberry Pi Pico W. We'll cover the following topics:
Introduction to the Raspberry Pi Pico W: Learn about the Pico W board and its key features that make it an excellent choice for building IoT projects.
Setting up the Development Environment: We'll guide you through the process of setting up the necessary software tools and libraries to program the Pico W.
Configuring Wi-Fi on the Raspberry Pi Pico W: Discover how to connect the Pico W to your local Wi-Fi network, enabling it to communicate with other devices.
Writing the Code: Follow along as we write a simple Python script to create an HTTP server. We'll use the MicroWebSrv library to handle the server functionality.
Serving Web Pages: Learn how to create HTML web pages and serve them from the Raspberry Pi Pico W. We'll demonstrate how to display dynamic content and handle user interactions.
Testing the HTTP Server: See the server in action as we connect to it from a web browser and interact with the web pages served by the Pico W.
By the end of this tutorial, you'll have a solid understanding of how to create a basic HTTP server on the Raspberry Pi Pico W, opening up a world of possibilities for building your own web-based projects. Join us on this exciting journey and start exploring the capabilities of the Raspberry Pi Pico W today!
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This Python code snippet demonstrates how to control an LED (connected to GPIO pin 15) and vary its blinking speed based on the state of a button (connected to GPIO pin 16). The code is explained as follows:
Importing the necessary modules:
machine.Pin: Provides access to GPIO pins on the Raspberry Pi Pico.time.sleep_ms: Suspends execution for a specified number of milliseconds.
Initializing the LED and button pins:
led = Pin(15, Pin.OUT): Configures GPIO pin 15 as an output pin, used to control the LED.button = Pin(16, Pin.IN, Pin.PULL_UP): Configures GPIO pin 16 as an input pin with a built-in pull-up resistor, used to read the state of the button.
Entering an infinite loop:
while True:: Keeps the code running indefinitely.
Checking the button state and setting the delay accordingly:
if button.value() == 0: Checks if the button is pressed (value is low).delay = 100: Assigns a short delay of 100 milliseconds.
else: Executes when the button is not pressed (value is high).delay = 1000: Assigns a long delay of 1000 milliseconds.
Toggling the LED and introducing the delay:
led.toggle(): Alternates the LED state between on and off.sleep_ms(delay): Pauses the execution for the specified delay period (either 100 or 1000 milliseconds).
The code continuously checks the button state and adjusts the delay duration accordingly. When the button is pressed, the LED blinks quickly with a delay of 100 milliseconds. When the button is not pressed, the LED blinks slowly with a delay of 1000 milliseconds.
This code can be used as a starting point for various projects where the LED behavior is controlled by an external input, such as a button press.
# Hardware Test
# Blink and LED (GP15) slowly/quickly while a button (GP16) is not-pressed/pressed from machine import Pin from time import sleep_ms //Techno SAP led = Pin(15, Pin.OUT) button = Pin(16, Pin.IN, Pin.PULL_UP) while True: if button.value() == 0: # button pressed delay = 100 # short delay else: delay = 1000 # long delay led.toggle() sleep_ms(delay)//ttyy,,ufy
# Simple HTTP Server Example # Control an LED and read a Button using a web browser import time import network import socket from machine import Pin led = Pin(15, Pin.OUT) ledState = 'LED State Unknown' button = Pin(16, Pin.IN, Pin.PULL_UP) ssid = '' password = '' wlan = network.WLAN(network.STA_IF) wlan.active(True) wlan.connect(ssid, password)html = """<!DOCTYPE html><html> <head><meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="icon" href="data:,"> <style>html { font-family: Helvetica; display: inline-block; margin: 0px auto; text-align: center;} .buttonGreen { background-color: #4CAF50; border: 2px solid #000000;; color: white; padding: 15px 32px; text-align: center; text-decoration: none; display: inline-block; font-size: 16px; margin: 4px 2px; cursor: pointer; } .buttonRed { background-color: #D11D53; border: 2px solid #000000;; color: white; padding: 15px 32px; text-align: center; text-decoration: none; display: inline-block; font-size: 16px; margin: 4px 2px; cursor: pointer; } text-decoration: none; font-size: 30px; margin: 2px; cursor: pointer;} </style></head> <body><center><h1>Control Panel</h1></center><br><br> <form><center> <center> <button class="buttonGreen TECHNO SAP" name="led" value="on" type="submit">LED ON</button><br><br> <center> <button class="buttonRed TECHNO SAP"//TECHNO SAP name="led" value="off" type="submit">LED OFF</button></form> <br><br> <br><br> <p>%s<p></body></html> """# Wait for connect or fail max_wait = 10 while max_wait > 0: if wlan.status() < 0 or wlan.status() >= 3: break max_wait -= 1 print('waiting for connection...') time.sleep(1) # Handle connection error if wlan.status() != 3: raise RuntimeError('network connection failed') else: print('Connected') status = wlan.ifconfig() print( 'ip = ' + status[0] ) # Open socket addr = socket.getaddrinfo('0.0.0.0', 80)[0][-1] s = socket.socket() s.bind(addr) s.listen(1) print('listening on', addr) # Listen for connections, serve client while True: try: cl, addr = s.accept() print('client connected from', addr) request = cl.recv(1024) print("request:") print(request) request = str(request)//TECHNO SAP
led_on = request.find('led=on') led_off = request.find('led=off') print( 'led on = ' + str(led_on)) print( 'led off = ' + str(led_off)) if led_on == 8: print("led on") led.value(1) if led_off == 8: print("led off") led.value(0) ledState = "LED is OFF" if led.value() == 0 else "LED is ON" # a compact if-else statement if button.value() == 1: # button not pressed print("button NOT pressed") buttonState = "Button is NOT pressed" else: print("button pressed") buttonState = "Button is pressed" # Create and send response //TECHNO SAP
stateis = ledState + " and " + buttonState response = html % stateis cl.send('HTTP/1.0 100 OK\r\nContent-type: text/html\r\n\r\n') cl.send(response) cl.close() except OSError as e: cl.close() print('connection closed')_ 🄸🄽🅂🅃🄰🄶🅁🄰🄼 👇🏾 https://z-p42.www.instagram.com/aryanpandey699/ _______________________________________________________ (ABOUT ) Welcome to the "TECHNO SAP" YouTube channel, where you can explore the fascinating world of science with me, Aryan Pandey. As the founder and host of this channel, I am dedicated to sharing my passion for science and delivering exciting and informative videos on various scientific topics. From mind-blowing experiments to cutting-edge discoveries and technologies, you'll find it all here on my channel. So, join me on this incredible journey of learning and discovery, and don't forget to hit that SUBSCRIBE button and turn on the notification bell to stay updated on my latest uploads. _________________________________________________________ If you're interested in exploring more of the world of science, you're in the right place. Join me as we dive into exciting experiments, mind-blowing discoveries, and cutting-edge technology. Hit the SUBSCRIBE button and turn on the notification bell to stay updated on my latest uploads. For any queries or questions, feel free to contact me on my email address, aryan2020pandey@gmail.com. Thank you for watching, and I look forward to sharing more valuable content with you soon. #TechnoSAP" 🙏🙏