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try: 
  import usocket as socket 
except: 
  import socket 
   
from time import sleep 
from machine import Pin 
import onewire, ds18x20 
 
import network 
 
import esp 
esp.osdebug(None) 
 
import gc 
gc.collect() 
 
ds_pin = Pin(4) 
ds_sensor = ds18x20.DS18X20(onewire.OneWire(ds_pin)) 
 
ssid = 'KHIM' 
password = 'Kk09112544' 
 
station = network.WLAN(network.STA_IF) 
 
station.active(True) 
station.connect(ssid, password) 
 
while station.isconnected() == False: 
  pass 
 
print('Connection successful') 
print(station.ifconfig()) 
 
def read_ds_sensor(): 
  roms = ds_sensor.scan() 
  print('Found DS devices: ', roms) 
  print('Temperatures: ') 
  ds_sensor.convert_temp() 
  for rom in roms: 
    temp = ds_sensor.read_temp(rom)
    time.sleep_ms(750)
    if isinstance(temp, float): 
      msg = round(temp, 2) 
      print(temp, end=' ') 
      print('Valid temperature') 
      return msg 
  return b'0.0' 
   
def web_page(): 
  temp = read_ds_sensor() 
  html = """<!DOCTYPE HTML> 
  <html> 
    <head> 
     
      <meta name="viewport" content="width=device-width, initial-scale=1"> 
      <meta http-equiv="refresh" content="1"> 
      <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.7.2/css/all.css" integrity="sha384-fnmOCqbTlWIlj8LyTjo7mOUStjsKC4pOpQbqyi7RrhN7udi9RwhKkMHpvLbHG9Sr" crossorigin="anonymous"> 
      <style>  
        html { font-family: Arial; display: inline-block; margin: 0px auto; text-align: center; } 
        h2 { font-size: 3.0rem; }  
        p { font-size: 3.0rem; }  
        .units { font-size: 1.2rem; }  
        .ds-labels{ font-size: 1.5rem; vertical-align:middle; padding-bottom: 15px; } 
      </style> 
      <meta http-equiv="refresh" content="3"> <!-- Refresh every 5 seconds --> 
    </head> 
    <body> 
      <h2> ESP with DS18B20</h2> 
      <p> 
        <i class="fas fa-thermometer-half" style="color:#059e8a;"></i>  
        <span class="ds-labels">Temperature</span> 
        <span id="temperature">""" + str(temp) + """</span> 
        <sup class="units">&deg;C</sup> 
      </p> 
      <p> 
        <i class="fas fa-thermometer-half" style="color:#059e8a;"></i>  
        <span class="ds-labels">Temperature</span> 
        <span id="temperature">""" + str(round(temp * (9/5) + 32.0, 2)) + """</span> 
        <span class="ds-labels">&deg;F</span> 
      </p> 
    </body> 
  </html>""" 
  return html 
 
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 
s.bind(('', 80)) 
s.listen(3) 
while True: 
  try: 
    if gc.mem_free() < 102000: 
      gc.collect() 
    conn, addr = s.accept() 
    conn.settimeout(3.0) 
    print('Got a connection from %s' % str(addr)) 
    request = conn.recv(1024) 
    conn.settimeout(None) 
    request = str(request) 
    print('Content = %s' % request) 
    response = web_page() 
    conn.send('HTTP/1.1 200 OK\n') 
    conn.send('Content-Type: text/html\n') 
    conn.send('Connection: close\n\n') 
    conn.sendall(response) 
    conn.close() 
  except OSError as e: 
    conn.close() 
    print('Connection closed')
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