from machine import Pin import network import socket import time # Define GPIO pins RELAY1 = Pin(32, Pin.OUT) RELAY2 = Pin(33, Pin.OUT) # Initialize GPIO states RELAY1.value(0) # OFF RELAY2.value(0) # OFF RELAY1_state = "RELAY 1 is OFF" RELAY2_state = "RELAY 2 is OFF" #WiFi credentials ssid = 'yourssid' password = 'yourpassword' wlan = network.WLAN(network.STA_IF) #function to connect to Wi-Fi network def cnctWifi(): wlan.active(True) print('Attempting to connect to the network...') wlan.connect(ssid, password) max_wait = 10 while max_wait > 0 and not wlan.isconnected(): max_wait -= 1 print('waiting for connection...') time.sleep(1) # Manage connection errors if not wlan.isconnected(): print('Network Connection has failed') else: print('Connected to the network successfully.') status = wlan.ifconfig() print( 'Enter this address in browser = ' + status[0] ) #HTML + CSS for webpage html = """ ESP32-EVB Relays control Web Server

ESP32-EVB Relays Web Server

%s

%s

""" # Connect to Wi-Fi cnctWifi() # Set up socket for web server addr = socket.getaddrinfo('0.0.0.0', 80)[0][-1] s = socket.socket() s.setblocking(0) s.bind(addr) s.listen(1) print('listening on', addr) # Main loop for handling client requests while True: if not wlan.isconnected(): print("Connection failed. Trying to reconnect") wlan.disconnect() cnctWifi() if wlan.isconnected(): try: cl, addr = s.accept() print('client connected from', addr) request = cl.recv(1024) print(request) request = str(request) RELAY1_on = request.find('/RELAY1/on') RELAY1_off = request.find('/RELAY1/off') RELAY2_on = request.find('/RELAY2/on') RELAY2_off = request.find('/RELAY2/off') if RELAY1_on == 6: print("RELAY 1 is on") RELAY1.value(1) RELAY1_state = "RELAY 1 is ON" if RELAY1_off == 6: print("RELAY 1 is off") RELAY1.value(0) RELAY1_state = "RELAY 1 is OFF" if RELAY2_on == 6: print("RELAY 2 is on") RELAY2.value(1) RELAY2_state = "RELAY 2 is ON" if RELAY2_off == 6: print("RELAY 2 is off") RELAY2.value(0) RELAY2_state = "RELAY 2 is OFF" response = html % (RELAY1_state, RELAY2_state) cl.send('HTTP/1.0 200 OK\r\nContent-type: text/html\r\n\r\n') cl.send(response) cl.close() except: pass time.sleep(0.1)