# Import necessary modules
import network
import socket
import time
import random
from machine import Pin
# Create an LED object on pin 'LED'
led = Pin('LED', Pin.OUT)
# Wi-Fi credentials
ssid = 'Buffalo-2G-8340'
password = '636nsa535ds3v'
# HTML template for the webpage
def webpage(random_value, state):
html = f"""
<!DOCTYPE html>
<html>
<head>
<title>Pico Web Server</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body>
<h1>Raspberry Pi Pico Web Server</h1>
<h2>Led Control</h2>
<form action="./lighton">
<input type="submit" value="Light on" />
</form>
<br>
<form action="./lightoff">
<input type="submit" value="Light off" />
</form>
<p>LED state: {state}</p>
<h2>Fetch New Value</h2>
<form action="./value">
<input type="submit" value="Fetch value" />
</form>
<p>Fetched value: {random_value}</p>
</body>
</html>
"""
return str(html)
# Connect to WLAN
wlan = network.WLAN(network.STA_IF)
wlan.active(True)
wlan.connect(ssid, password)
# Wait for Wi-Fi connection
connection_timeout = 10
while connection_timeout > 0:
if wlan.status() >= 3:
break
connection_timeout -= 1
print('Waiting for Wi-Fi connection...')
time.sleep(1)
# Check if connection is successful
if wlan.status() != 3:
raise RuntimeError('Failed to establish a network connection')
else:
print('Connection successful!')
network_info = wlan.ifconfig()
print('IP address:', network_info[0])
# Set up socket and start listening
addr = socket.getaddrinfo('0.0.0.0', 80)[0][-1]
s = socket.socket()
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
s.bind(addr)
s.listen()
print('Listening on', addr)
# Initialize variables
state = "OFF"
random_value = 0
# Main loop to listen for connections
while True:
try:
conn, addr = s.accept()
print('Got a connection from', addr)
# Receive and parse the request
request = conn.recv(1024)
request = str(request)
print('Request content = %s' % request)
try:
request = request.split()[1]
print('Request:', request)
except IndexError:
pass
# Process the request and update variables
if request == '/lighton?':
print("LED on")
led.value(1)
state = "ON"
elif request == '/lightoff?':
led.value(0)
state = 'OFF'
elif request == '/value?':
random_value = random.randint(0, 20)
# Generate HTML response
response = webpage(random_value, state)
# Send the HTTP response and close the connection
conn.send('HTTP/1.0 200 OK\r\nContent-type: text/html\r\n\r\n')
conn.send(response)
conn.close()
except OSError as e:
conn.close()
print('Connection closed')
-------------------------------------------------------------------
asyncioはビルトインだった！
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