Wokwi - Online ESP32, STM32, Arduino Simulator

import network
import socket
from machine import ADC, Pin

# Wi-Fi credentials
SSID = "IQOO Z9 5G"
PASSWORD = "9008512597"

# Connect to Wi-Fi
def connect_to_wifi():
    wlan = network.WLAN(network.STA_IF)
    wlan.active(True)
    wlan.connect(SSID, PASSWORD)
    print(f"Connecting to Wi-Fi network: {SSID}...")
    while not wlan.isconnected():
        pass
    print("Connected! IP address:", wlan.ifconfig()[0])
    return wlan.ifconfig()[0]

# Set up the ADC sensor on GPIO 26
sensor = ADC(Pin(26))

# HTML with JavaScript for real-time data update
html = """
<!DOCTYPE html>
<html>
<head>
    <title>Real-Time Sensor Data</title>
    <script>
        async function fetchData() {
            const response = await fetch('/sensor');
            const data = await response.text();
            document.getElementById('value').textContent = data;
            setTimeout(fetchData, 1000);
        }
        window.onload = fetchData;
    </script>
</head>
<body>
    <h1>Real-Time Sensor Data</h1>
    <p>Sensor Value: <span id="value">Loading...</span></p>
</body>
</html>
"""

# Start the HTTP server
def start_server(ip):
    addr = socket.getaddrinfo(ip, 80)[0][-1]
    server_socket = socket.socket()
    server_socket.bind(addr)
    server_socket.listen(1)
    print(f"Server running at http://{ip}/")
    
    try:
        while True:
            conn, addr = server_socket.accept()
            print(f"Connection from {addr}")
            try:
                request = conn.recv(1024).decode()
                print("Request received:", request)
                
                if "GET /sensor" in request:
                    sensor_value = str(sensor.read_u16())
                    conn.send("HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\n\r\n" + sensor_value)
                else:
                    conn.send("HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r\n" + html)
            except Exception as e:
                print("Error processing request:", e)
            finally:
                conn.close()
    except KeyboardInterrupt:
        print("\nServer stopped manually.")
    except Exception as e:
        print(f"Server encountered an error: {e}")
    finally:
        server_socket.close()
        print("Socket closed.")

# Main program
if __name__ == "__main__":
    try:
        ip_address = connect_to_wifi()
        start_server(ip_address)
    except Exception as e:
        print(f"Program encountered an error: {e}")