Send sync TCP socket from PC to ESP32 in stream async

[nastiliano]

Hello everybody.

I'm able to do this connection (described in the title) only in a random way. Sometimes works, others not...

My PC app doesn't need to work async, because I press a button to send a JSON bytes via sockets TCP, but my ESP32 device need to work obviously in async mode becase needs to listen sockets on a port and do another tasks (coros).

My client code (PC) is:

class TCP_IP():

    # CONSTRUCTOR
    def __init__(self , *args):

        # IMPORT PARAMETERS
        self.HOST_IP = args[0]
        self.trama_dades = args[1]


    def __enter__(self):
        # Create "socket TCP" object
        self.client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        return self.client_socket


    def __exit__(self , exc_type , exc_value , exc_tb):
        if self.client_socket:
            self.client_socket.close()
        # If exceptions
        if exc_type:
            # Returns "None" and delete exceptions
            return True


# ---------------- SENDING ----------------
def sending(self):

    # Context manager
    with self as client_socket:

        # Connection timeout
        client_socket.settimeout(5)

        # Connection itself
        client_socket.connect((self.HOST_IP , 19204))
        
        #Sending ("bytes JSON UTF-8")
        client_socket.sendall(self.trama_dades)

        # Indicates sending socket final
        client_socket.shutdown(socket.SHUT_WR)
        
        # Recieve response from deice
        connection_return = str(client_socket.recv(1024) , "UTF-8")

My server (ESP32) code is (aprox.):

class TCP_IP():

    # CONSTRUCTOR
    def __init__(self , *args):
            
        # IMPORT PARAMETERS
       ...

    # ---------------- LISTENING CORO ----------------
    async def escolta_WIFI(self , reader , writer):

        # Listening
        data = await reader.read()
    
        # Decode "bytes JSON UTF-8"
        data = json.loads(trama_dades.decode())
    
        # Return ACK to client
        writer.write("01")
        await writer.drain()
        writer.close()
        await writer.wait_closed()


async def main():
    ...
    await asyncio.gather(TCP_IP , other_coros())

asyncio.run(main())

Some help please??
Best Regards