DRAFT ESP32 - PYTHON - Lecture 4D - Controllare un LED da remoto via webserver

from machine import Pin
import time

'''
led = Pin(22, Pin.OUT) # Definizione del pin del LED

# Ciclo infinito
while True:
    # Se il LED è acceso (HIGH), spegnilo (LOW)
    if led.value() == 1:
        led.value(0)
    # Altrimenti, accendilo (HIGH)
    else:
        led.value(1)
    
    # Pausa di 1 secondo
    time.sleep(1)   
'''

from time import sleep

try:
  import usocket as socket
except:
  import socket

from machine import Pin
import network

import esp
esp.osdebug(None)

import gc
gc.collect()

ssid = MioCellulareHotSpot'
password = 'passwordDelMioHotSpot'

station = network.WLAN(network.STA_IF)

station.active(True)
try:
    station.disconnect()
except:
    pass
station.connect(ssid, password)

while station.isconnected() == False:
    print('The station is NOT connected: verify !')
    sleep(0.5)
    #break

print('Connection successful')
print(station.ifconfig())

led = Pin(2, Pin.OUT)


#########################
# Dichiarazione Funzioni
#########################

def web_page():
  if led.value() == 1:
    gpio_state="ON"
  else:
    gpio_state="OFF"
 
  html = """<html><head> <title>ESP Web Server</title> <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;}
  h1{color: #0F3376; padding: 2vh;}p{font-size: 1.5rem;}.button{display: inline-block; background-color: #e7bd3b; border: none;
  border-radius: 4px; color: white; padding: 16px 40px; text-decoration: none; font-size: 30px; margin: 2px; cursor: pointer;}
  .button2{background-color: #4286f4;}</style></head><body> <h1>ESP Web Server</h1>
  <p>GPIO state: <strong>""" + gpio_state + """</strong></p><p><a href="/?led=on"><button class="button">ON</button></a></p>
  <p><a href="/?led=off"><button class="button button2">OFF</button></a></p></body></html>"""
  return html

#s.close()
#del s
try:
    s.close()
except:
    pass
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
s.bind(('', 80))
s.listen(5)

while True:
  conn, addr = s.accept()
  print('Got a connection from %s' % str(addr))
  request = conn.recv(1024)
  request = str(request)
  print('Content = %s' % request)
  led_on = request.find('/?led=on')
  led_off = request.find('/?led=off')
  if led_on == 6:
    print('LED ON')
    led.value(1)
  if led_off == 6:
    print('LED OFF')
    led.value(0)
  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()