first_con.py

import serial
import socket
import threading

print("[ARDUINO] Placa conectada en COM3")
ser = serial.Serial('COM3', 9600, timeout=1)

def handle_client(conn):
    while True:
        try:
            data = conn.recv(1024).decode().strip()
            if not data:
                break
            print(f"[CMD] Recibido: {data}")
            ser.write((data + "\n").encode('utf-8'))
            resp = ser.readline().decode().strip()
            conn.sendall((resp or "OK").encode('utf-8'))
        except Exception as e:
            print("[ERROR]", e)
            break
    conn.close()

# Servidor socket local
HOST = '127.0.0.1'
PORT = 5678
def main():

    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
        s.bind((HOST, PORT))
        s.listen()
        print(f"[SERVER] Escuchando en {HOST}:{PORT}")
        while True:
            conn, addr = s.accept()
            print(f"[CLIENTE] Conectado: {addr}")
            threading.Thread(target=handle_client, args=(conn,)).start()

if __name__ == "__main__":
    main()