web_server.py

   1 import network, socket, time, machine
   2
   3 cat=machine.Pin(15,machine.Pin.OUT)
   4 red=machine.Pin(18,machine.Pin.OUT)
   5 green=machine.Pin(19,machine.Pin.OUT)
   6
   7 ssid='SSID'
   8 password='PSSWD'
   9
  10 def connect():
  11     wlan=network.WLAN(network.STA_IF)
  12     wlan.active(True)
  13     wlan.connect(ssid,password)
  14     while wlan.isconnected() == False:
  15         print('Waiting for connection...')
  16         time.sleep(1)
  17     ip=wlan.ifconfig()[0]
  18     print(f'Connected on {ip}')
  19     return ip
  20
  21 def open_socket(ip):
  22     address=(ip,80)
  23     connection=socket.socket()
  24     connection.bind(address)
  25     connection.listen(1)
  26     return connection
  27
  28
  29 def webpage(Gstate,Rstate,state):
  30     html=f"""
  31           <!DOCTYPE html>
  32           <html lang="en">
  33           <head>
  34               <meta charset="UTF-8" />
  35               <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  36           </head>
  37           <body>
  38           <form action="./lighton">
  39           <input type="submit" value="Cat on" />
  40           </form>
  41           <form action="./lightoff" />
  42           <input type="submit" value="Cat off" />
  43           </form>
  44           <form action="./redon">
  45           <input type="submit" value="Red on"/>
  46           </form>
  47           <form action="./redoff">
  48           <input type="submit" value="Red off"/>
  49           </form>
  50           <form action="./greenon">
  51           <input type="submit" value="Green on"/>
  52           </form>
  53           <form action="./greenoff">
  54           <input type="submit" value="Green off"/>
  55           </form>
  56           <p>Cat is {state}</p>
  57           <p>Red is {Rstate}</p>
  58           <p>Green is {Gstate}</p>
  59           </body>
  60           </html>
  61           """
  62     return html
  63
  64 def serve(connection):
  65     state='OFF'
  66     Rstate='OFF'
  67     Gstate='OFF'
  68
  69     while True:
  70         client=connection.accept()[0]
  71         request=client.recv(1024)
  72         request=str(request)
  73         try:
  74             request=request.split()[1]
  75         except IndexError:
  76             pass
  77         if request=='/lighton?':
  78             cat.on()
  79             state='ON'
  80         elif request=='/lightoff?':
  81             cat.off()
  82             state='OFF'
  83         elif request=='/redon?':
  84             red.on()
  85             Rstate='ON'
  86         elif request=='/redoff?':
  87             red.off()
  88             Rstate='OFF'
  89         elif request=='/greenon?':
  90             green.on()
  91             Gstate='ON'
  92         elif request=='/greenoff?':
  93             green.off()
  94             Gstate='OFF'
  95         html=webpage(Gstate,Rstate,state)
  96         client.send(html)
  97         client.close()
  98
  99 try:
 100     ip=connect()
 101     connection=open_socket(ip)
 102     serve(connection)
 103 except KeyboardInterrupt:
 104     machine.reset()