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Date
Nov 24, 2024
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docx
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Uploaded by DeaconMorning11309
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1.
RPI to iPhone MQTT
2.
Flask Button Example
3.
Raspberry Pi Web Hello
4.
MQTT on Raspberry Pi
5.
Install pyimgur module.
6.
Raspberry Pi Camera Script
7.
Motor Speed Control Basics
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1.
Raspberry Pi Image Capture
2.
APT Install Paho-MQTT
3.
Addressing Tables and Networks
4.
Network Configurations Request
5.
Estimate Population Mean 68%
6.
Estimate Mean Speed Z-Confidence
7.
Control Limits Calculation Guide
8.
Efficiency of Modulation Techniques
9.
Bell Labs: Nokia R&D
Previous 7 Days
1.
BER and SER Explanation
2.
Control Limits Calculation Instructions
3.
RPI Control LED MQTT
4.
Best Eyeglass Shape
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5.
WhatsApp Recovery Options
6.
Cisco Proprietary Protocol
7.
Cisco Switch in 802.1X
8.
Static Routes Configuration Guide
9.
Assign IP Addresses Guide
10.
IP Address Assignment Guidelines
11.
GigE 0/0.27 VLAN Setup
12.
Packet Tracker Port Issue
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how to use mqtt on raspbserry pi
ChatGPT
MQTT (Message Queuing Telemetry Transport) is a lightweight and widely used messaging protocol for small sensors and mobile devices optimized for high-latency or unreliable networks. Using MQTT on a Raspberry Pi involves setting up an MQTT broker and then connecting devices to it. Here's a basic guide on how to use MQTT on a Raspberry Pi:
Setting up MQTT Broker on Raspberry Pi:
1.
Install Mosquitto (MQTT Broker):
sql
sudo apt update
sudo apt install -y mosquitto mosquitto-clients
Start Mosquitto:
sql
sudo systemctl start mosquitto
To ensure Mosquitto starts on boot:
bash
sudo systemctl enable mosquitto
Check Mosquitto Status:
lua
3.
sudo systemctl status mosquitto
4.
Testing MQTT Broker:
1.
Subscribe to a Topic:
Open a terminal and subscribe to a topic. Replace "your-topic" with the desired topic.
mosquitto_sub -h localhost -t your-topic
Publish to the Topic:
Open another terminal and publish a message to the same topic.
arduino
2.
mosquitto_pub -h localhost -t your-topic -m "Hello, MQTT!"
3.
You should see the message in the terminal where you subscribed.
Using MQTT in Python (for example):
You can use the paho-mqtt
library to work with MQTT in Python.
1.
Install the Paho-MQTT library:
pip install paho-mqtt
Python MQTT Subscriber:
python
import paho.mqtt.client as mqtt
def on_connect(client, userdata, flags, rc):
print("Connected with result code "+str(rc))
client.subscribe("your-topic")
def on_message(client, userdata, msg):
print(msg.payload.decode())
client = mqtt.Client()
client.on_connect = on_connect
client.on_message = on_message
client.connect("localhost", 1883, 60)
client.loop_forever()
Python MQTT Publisher:
python
3.
import paho.mqtt.publish as publish
4.
5.
publish.single("your-topic", "Hello, MQTT!", hostname="localhost")
6.
Integrating with IoT Devices:
1.
Install MQTT Client on Other Devices:
Install an MQTT client library on the devices you want to connect to the Raspberry Pi.
2.
Connect Devices:
Use the client library to connect the devices to the MQTT broker on your Raspberry Pi and subscribe/publish to the desired topics.
This basic guide should get you started with setting up and using MQTT on a Raspberry Pi. Adjust as needed based on your specific use case and requirements.
to make a web page ChatGPT
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To create a web page on your Raspberry Pi, you'll need a web server and some HTML/CSS for the content and styling. Here's a step-by-step guide using Apache as the web server:
Step 1: Install Apache
1.
Update your package list:
bash
sudo apt update
Install Apache:
bash
sudo apt install apache2
Start the Apache service:
bash
sudo systemctl start apache2
To ensure Apache starts on boot:
bash
4.
sudo systemctl enable apache2
5.
Step 2: Create a Simple HTML Page
1.
Navigate to the default web directory:
bash
cd /var/www/html
Create a new HTML file, for example, index.html
:
bash
sudo nano index.html
Add some basic HTML content:
html
3.
<!DOCTYPE html>
4.
<html lang="en">
5. <head>
6. <meta charset="UTF-8">
7. <meta name="viewport" content="width=device-width, initial-
scale=1.0">
8. <title>My Raspberry Pi Web Page</title>
9. </head>
10.
<body>
11.
<h1>Hello, Raspberry Pi World!</h1>
12.
<p>This is a simple web page hosted on my Raspberry Pi.</p>
13.
</body>
14.
</html>
15.
16. Save and exit the text editor.
Step 3: Access the Web Page
1.
Open a web browser and enter your Raspberry Pi's IP address in the address bar. You can find the IP address using the hostname -I
command.
2.
For example, if the IP address is 192.168.1.100
, enter http://192.168.1.100
in the browser.
You should see your simple web page.
Optional: Customizing and Expanding
To modify your web page, edit the index.html
file in the /var/www/html
directory.
You can add CSS styles, JavaScript, and more HTML content to enhance the appearance and functionality of your web page.
If you want to host a more complex website or use a specific web development framework, you may need additional software and configurations.
Remember that this is a basic setup. Depending on your needs, you might want to consider additional security measures, such as configuring firewalls or using HTTPS for secure communication.
make it in .py file
ChatGPT
If you want to serve a simple web page using a Python script, you can use the http.server
module that comes with Python. Here's a basic example:
Step 1: Create a Python Script
1.
Open a text editor and create a file, for example, web_server.py
:
python
1.
# web_server.py
2.
from http.server import SimpleHTTPRequestHandler
3.
from socketserver import TCPServer
4.
5.
class MyHandler(SimpleHTTPRequestHandler):
6. def end_headers(self):
7. self.send_header('Access-Control-Allow-Origin', '*')
8. super().end_headers()
9.
10.
PORT = 8000
11.
12.
with TCPServer(('0.0.0.0', PORT), MyHandler) as httpd:
13.
print(f'Serving on port {PORT}')
14.
httpd.serve_forever()
15. This script creates a basic HTTP server serving the current directory.
Step 2: Run the Python Script
1.
Open a terminal and navigate to the directory where you saved web_server.py
.
2.
Run the script:
bash
2.
python3 web_server.py
3.
If you don't have Python 3 installed, you may use python
instead.
Step 3: Access the Web Page
1.
Open a web browser and go to http://localhost:8000
or http://<your_raspberry_pi_ip>:8000
.
2.
You should see your simple web page.
Optional: Modify the Web Page
You can modify the content of your web page by editing the index.html
file in the same directory as your Python script.
Notes:
This is a simple example and may not be suitable for production use. For production, you might want to use a more robust web server or a web application framework like Flask or
Django.
Keep in mind that using a Python script for serving web pages is more suitable for development or small-scale projects. For larger projects or production use, consider using
a dedicated web server and a proper web framework.
Remember to consider security measures based on your deployment scenario.
there vsudo nano index.html is already code it in
ChatGPT
If you already have the HTML code for your webpage and you want to serve it using a Python script, you can modify the web_server.py
script to include your HTML content. Here's an example:
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1.
Open your web_server.py
file and modify it as follows:
python
# web_server.py
from http.server import SimpleHTTPRequestHandler
from socketserver import TCPServer
class MyHandler(SimpleHTTPRequestHandler):
def end_headers(self):
self.send_header('Access-Control-Allow-Origin', '*')
super().end_headers()
PORT = 8000
html_content = """
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>My Raspberry Pi Web Page</title>
</head>
<body>
<h1>Hello, Raspberry Pi World!</h1>
<p>This is a simple web page served using Python.</p>
</body>
</html>
"""
with open('index.html', 'w') as f:
f.write(html_content)
with TCPServer(('0.0.0.0', PORT), MyHandler) as httpd:
print(f'Serving on port {PORT}')
httpd.serve_forever()
This modified script includes your HTML content in the html_content
variable and writes it to the index.html
file when the script runs. The server will then serve this HTML content when you access the specified URL.
Remember to replace the default HTML content in the html_content
variable with your actual HTML code.
Now, run the script with:
bash
python3 web_server.py
And access your webpage in a web browser at http://localhost:8000
or http://<your_raspberry_pi_ip>:8000
.
where to put py file
ChatGPT
For simplicity and organization, you can put your Python script (
web_server.py
) in the same directory as your HTML file (
index.html
). Here's a step-by-step guide:
1.
Create a Project Directory:
bash
mkdir my_web_project
cd my_web_project
Create the Python Script:
Open a text editor and create a file named web_server.py
in the my_web_project
directory. Copy and paste the modified Python script into this file.
Create the HTML File:
Similarly, create an index.html
file in the same my_web_project
directory and add your HTML content to it.
Run the Python Script:
Open a terminal, navigate to the my_web_project
directory, and run the Python script:
bash
4.
python3 web_server.py
5.
6.
Access the Web Page:
Open a web browser and go to http://localhost:8000
or http://<your_raspberry_pi_ip>:8000
.
By keeping the Python script and HTML file in the same directory, you maintain a straightforward project structure. Adjust the file names and content according to your specific requirements.
python3 web_server.py what code to put in
ChatGPT
If you want to serve a simple HTML file using a Python script, you can use the http.server
module. Here is a basic example of what you can put in your web_server.py
script:
python
# web_server.py
from http.server import SimpleHTTPRequestHandler
from socketserver import TCPServer
class MyHandler(SimpleHTTPRequestHandler):
def end_headers(self):
self.send_header('Access-Control-Allow-Origin', '*')
super().end_headers()
PORT = 8000
with TCPServer(('0.0.0.0', PORT), MyHandler) as httpd:
print(f'Serving on port {PORT}')
httpd.serve_forever()
This script creates a basic HTTP server that serves files from the current directory. It also includes a simple modification to enable cross-origin resource sharing (
Access-Control-
Allow-Origin: *
header).
Make sure to place this script in the same directory as your index.html
file. Then, run the script using:
bash
python3 web_server.py
Once the script is running, you can access your webpage by navigating to http://localhost:8000
or http://<your_raspberry_pi_ip>:8000
in a web browser.
what should be on web page now
ChatGPT
To create a simple webpage that the Python script can serve, you need an HTML file with content. Here's a basic example of what you can include in your index.html
file:
html
<!-- index.html -->
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>My Raspberry Pi Web Page</title>
<style>
body {
font-family: Arial, sans-serif;
text-align: center;
margin: 20px;
}
h1 {
color: #3498db;
}
p {
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color: #333;
}
</style>
</head>
<body>
<h1>Hello, Raspberry Pi World!</h1>
<p>This is a simple web page served using Python.</p>
</body>
</html>
This example includes a basic HTML structure with a title, a heading (
<h1>
), a paragraph (
<p>
), and some simple styling using CSS.
Place this content in a file named index.html
and make sure the file is in the same directory as your web_server.py
script.
When you run the Python script with python3 web_server.py
and navigate to http://localhost:8000
or http://<your_raspberry_pi_ip>:8000
in a web browser, you should see this simple webpage. Feel free to customize the HTML and CSS according to your preferences and needs.
i click on it and there is index
ChatGPT
It sounds like you are able to see the "index" listing instead of your HTML content. This might happen if there is no index.html
file in the directory where you are running the Python script.
Make sure that:
1.
The index.html
file is in the same directory as your web_server.py
script.
2.
The file is named exactly as index.html
(case-sensitive).
If the issue persists, try specifying the filename explicitly in the browser URL. For example, if your script is running on http://localhost:8000
, try accessing http://localhost:8000/index.html
.
If you're still having trouble, please double-check your project directory structure and file names,
and ensure that the HTML file is accessible from the directory where the Python script is running.
no add a new web page py that says hello
ChatGPT
Sure, if you want to add a new Python script that serves a different HTML page, you can create another Python script (e.g., hello_page.py
) with the following content:
python
# hello_page.py
from http.server import SimpleHTTPRequestHandler
from socketserver import TCPServer
class MyHandler(SimpleHTTPRequestHandler):
def end_headers(self):
self.send_header('Access-Control-Allow-Origin', '*')
super().end_headers()
PORT = 8001 # You can use a different port for the second page
with TCPServer(('0.0.0.0', PORT), MyHandler) as httpd:
print(f'Serving on port {PORT}')
httpd.serve_forever()
This script is similar to the previous one but uses a different port (8001). It will serve files from the current directory.
Create a new HTML file (e.g., hello.html
) with the content you want:
html
<!-- hello.html -->
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Hello Page</title>
<style>
body {
font-family: Arial, sans-serif;
text-align: center;
margin: 20px;
}
h1 {
color: #27ae60;
}
</style>
</head>
<body>
<h1>Hello from a Different Page!</h1>
</body>
</html>
Now, when you run the hello_page.py
script:
bash
python3 hello_page.py
You can access the new page at http://localhost:8001
or http://<your_raspberry_pi_ip>:8001
.
put all in py file
ChatGPT
Certainly! You can combine the two pages into a single Python script. Let's create a script named
combined_server.py
:
python
# combined_server.py
from http.server import SimpleHTTPRequestHandler
from socketserver import TCPServer
class MyHandler(SimpleHTTPRequestHandler):
def end_headers(self):
self.send_header('Access-Control-Allow-Origin', '*')
super().end_headers()
# Serve the first page (index.html) on port 8000
PORT1 = 8000
handler1 = MyHandler
with TCPServer(('0.0.0.0', PORT1), handler1) as httpd1:
print(f'Serving on port {PORT1}')
httpd1.serve_forever()
# Serve the second page (hello.html) on port 8001
PORT2 = 8001
handler2 = MyHandler
handler2.directory = 'path_to_directory_containing_hello.html' # replace with your directory path
with TCPServer(('0.0.0.0', PORT2), handler2) as httpd2:
print(f'Serving on port {PORT2}')
httpd2.serve_forever()
Replace 'path_to_directory_containing_hello.html'
with the actual path to the directory containing your hello.html
file.
Make sure both HTML files (
index.html
and hello.html
) are in the same directory as your Python script or provide the correct paths in the script.
Run the script with:
bash
python3 combined_server.py
Now, you can access the first page at http://localhost:8000
and the second page at http://localhost:8001
or http://<your_raspberry_pi_ip>:8001
.
its just code
ChatGPT
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I apologize for any confusion. If you want to create a Python script that serves both HTML pages
from the same script, you can modify the script to handle different paths. Here's an example:
python
# combined_server.py
from http.server import SimpleHTTPRequestHandler
from socketserver import TCPServer
class MyHandler(SimpleHTTPRequestHandler):
def end_headers(self):
self.send_header('Access-Control-Allow-Origin', '*')
super().end_headers()
PORT = 8000
class CombinedHandler(MyHandler):
def do_GET(self):
if self.path == '/hello':
# Serve the hello.html page
self.path = '/hello.html'
else:
# Serve the index.html page for other paths
self.path = '/index.html'
return super().do_GET()
with TCPServer(('0.0.0.0', PORT), CombinedHandler) as httpd:
print(f'Serving on port {PORT}')
httpd.serve_forever()
In this example, the script uses a single server on port 8000. It checks the requested path, and if it's "/hello," it serves the hello.html
page; otherwise, it serves the index.html
page.
Make sure both HTML files (
index.html
and hello.html
) are in the same directory as your Python script.
Run the script with:
bash
python3 combined_server.py
Now, you can access the index.html
page at http://localhost:8000
and the hello.html
page at http://localhost:8000/hello
or http://<your_raspberry_pi_ip>:8000/hello
.
its just code
ChatGPT
I apologize for any confusion. If you want to have a Python script that serves different HTML pages based on the URL, here's a simplified version of the script:
python
# combined_server.py
from http.server import SimpleHTTPRequestHandler
from socketserver import TCPServer
class MyHandler(SimpleHTTPRequestHandler):
def end_headers(self):
self.send_header('Access-Control-Allow-Origin', '*')
super().end_headers()
def do_GET(self):
if self.path == '/hello':
# Serve the hello.html page
self.send_response(200)
self.send_header('Content-type', 'text/html')
self.end_headers()
with open('hello.html', 'rb') as file:
self.wfile.write(file.read())
else:
# Serve the index.html page for other paths
super().do_GET()
PORT = 8000
with TCPServer(('0.0.0.0', PORT), MyHandler) as httpd:
print(f'Serving on port {PORT}')
httpd.serve_forever()
Make sure both HTML files (
index.html
and hello.html
) are in the same directory as your Python script.
Run the script with:
bash
python3 combined_server.py
Now, you can access the index.html
page at http://localhost:8000
and the hello.html
page at http://localhost:8000/hello
or http://<your_raspberry_pi_ip>:8000/hello
.
how to delete all text in nano file
ChatGPT
In the nano
text editor, you can delete all text from a file by using the following steps:
1.
Open the file in nano
:
bash
1.
nano your_file.txt
2.
3.
Press Ctrl
+ K
:
This key combination cuts (kills) the text from the current cursor position to the end of the line.
4.
Press Ctrl
+ X
:
This key combination will prompt you to save the changes. Press Y
for Yes.
5.
If you want to save the changes to the existing file, press Enter
. If you want to save to a new file or with a different name, type the new filename and press Enter
.
This process will leave you with an empty file. Keep in mind that these operations are irreversible, and once you save the file, the previous content will be permanently deleted. If you haven't saved the file yet, you can exit nano
without saving by pressing Ctrl
+ C
when prompted
to save changes.
how to delte all text in nano file
ChatGPT
To delete all text in a file using the nano
text editor, you can follow these steps:
1.
Open the file in nano
:
bash
1.
nano your_file.txt
2.
3.
Press Ctrl
+ A
:
This key combination selects all text in the file.
4.
Press Backspace
or Delete
:
This removes the selected text.
5.
Press Ctrl
+ X
:
This key combination will prompt you to save the changes. Press Y
for Yes.
6.
If you want to save the changes to the existing file, press Enter
. If you want to save to a new file or with a different name, type the new filename and press Enter
.
This process will leave you with an empty file. Keep in mind that these operations are irreversible, and once you save the file, the previous content will be permanently deleted. If you haven't saved the file yet, you can exit nano
without saving by pressing Ctrl
+ C
when prompted
to save changes.
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ctrl a doesnt select just text
ChatGPT
I apologize for the confusion. In nano
, the Ctrl
+ A
combination is used to move the cursor to the beginning of the current line, not to select all text. To delete all text in nano
, you can use the following steps:
1.
Open the file in nano
:
bash
1.
nano your_file.txt
2.
3.
Press Ctrl
+ K
:
This key combination cuts (kills) the text from the current cursor position to the end of the line.
4.
Repeat Ctrl
+ K
until all lines are deleted.
5.
Press Ctrl
+ X
:
This key combination will prompt you to save the changes. Press Y
for Yes.
6.
If you want to save the changes to the existing file, press Enter
. If you want to save to a new file or with a different name, type the new filename and press Enter
.
These steps will delete all text in the file. Keep in mind that these operations are irreversible, and
once you save the file, the previous content will be permanently deleted. If you haven't saved the file yet, you can exit nano
without saving by pressing Ctrl
+ C
when prompted to save changes.
the hello page is just code
ChatGPT
If your "hello page" is displaying code instead of rendering the HTML content, it could be due to
several reasons. Here are a few things to check:
1.
File Content:
o
Make sure that the hello.html
file contains valid HTML code and is saved with the correct extension (
.html
).
o
Verify that the HTML tags are properly structured, and there are no syntax errors.
2.
Server Configuration:
o
Ensure that your Python script (
combined_server.py
) is correctly configured to serve HTML files.
o
Confirm that the hello.html
file is in the same directory as your Python script.
3.
Content-Type Header:
o
Check that the server is sending the correct Content-Type
header for HTML files. In the provided Python script, this should be handled automatically, but it's worth checking.
Here's an updated version of the combined_server.py
script that includes proper handling for serving HTML files:
python
# combined_server.py
from http.server import SimpleHTTPRequestHandler
from socketserver import TCPServer
class MyHandler(SimpleHTTPRequestHandler):
def end_headers(self):
self.send_header('Access-Control-Allow-Origin', '*')
super().end_headers()
PORT = 8000
class CombinedHandler(MyHandler):
def do_GET(self):
if self.path == '/hello':
# Serve the hello.html page
self.send_response(200)
self.send_header('Content-type', 'text/html')
self.end_headers()
with open('hello.html', 'rb') as file:
self.wfile.write(file.read())
else:
# Serve other files using the parent class's do_GET method
super().do_GET()
with TCPServer(('0.0.0.0', PORT), CombinedHandler) as httpd:
print(f'Serving on port {PORT}')
httpd.serve_forever()
Make sure that your hello.html
file has proper HTML content. If the issue persists, please share the content of your hello.html
file so that I can help you identify any potential issues.
combine html in python file code
ChatGPT
If you want to combine HTML content directly within a Python script, you can include the HTML content as a multiline string. Here's an example combining the content of index.html
and hello.html
directly within a Python script:
python
# combined_server.py
from http.server import SimpleHTTPRequestHandler
from socketserver import TCPServer
class MyHandler(SimpleHTTPRequestHandler):
def end_headers(self):
self.send_header('Access-Control-Allow-Origin', '*')
super().end_headers()
PORT = 8000
combined_html = """
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style>
body {
font-family: Arial, sans-serif;
text-align: center;
margin: 20px;
}
h1 {
color: #3498db;
}
p {
color: #333;
}
</style>
</head>
<body>
<h1>Hello, Raspberry Pi World!</h1>
<p>This is a simple web page served using Python.</p>
</body>
</html>
"""
class CombinedHandler(MyHandler):
def do_GET(self):
if self.path == '/hello':
# Serve the combined_html page
self.send_response(200)
self.send_header('Content-type', 'text/html')
self.end_headers()
self.wfile.write(combined_html.encode('utf-8'))
else:
# Serve other files using the parent class's do_GET method
super().do_GET()
with TCPServer(('0.0.0.0', PORT), CombinedHandler) as httpd:
print(f'Serving on port {PORT}')
httpd.serve_forever()
This script defines the HTML content within the combined_html
variable. When a request is made to /hello
, it serves this combined HTML content.
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While this approach works for small projects, it's generally recommended to keep HTML content
separate in files for better organization and maintenance, especially as your projects become more complex.
its still ncode
ChatGPT
I apologize for the confusion. If your HTML content is still appearing as code when served by the Python script, there are a few things to check:
1.
Content Encoding:
Make sure that you are properly encoding the HTML content before writing it to the response. In the updated example, I added .encode('utf-8')
to the self.wfile.write(combined_html)
line to ensure proper encoding. Make sure this line is present in your script.
python
1. self.wfile.write(combined_html.encode('utf-8'))
2.
3.
Proper File Content:
If you are still experiencing issues, ensure that the content of hello.html
within the combined_html
variable is indeed valid HTML. There might be an issue with the structure or syntax of the HTML code.
4.
Server Restart:
After making changes to the Python script, restart the server to apply the
changes.
If the issue persists, please provide the actual content of your hello.html
file, or if the content is not sensitive, you can share the content directly within our conversation. This will help in identifying any potential issues with the HTML content.
ChatGPT can make mistakes. Consider checking important information.
ChatGPT
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