How Can I Send Data from Raspberry Pi to MIT App Inventor using RFCOMM

Question

I want to Send a Data from my Raspberry Pi 3B+ to an MIT App that I created. I can send Data from my MIT to Raspberry Pi even to Arduino using rfcomm-server.py that comes from the PyBlueZ. but I cant seem to do the opposite where I should be able to send data from Raspberry Pi to my MIT App.

import bluetooth
server_sock = bluetooth.BluetoothSocket(bluetooth.RFCOMM)
server_sock.bind(("", bluetooth.PORT_ANY))
server_sock.listen(1)

port = server_sock.getsockname()[1]

uuid = "94f39d29-7d6d-437d-973b-fba39e49d4ee"

bluetooth.advertise_service(server_sock, "SampleServer", service_id=uuid,
                        service_classes=[uuid, bluetooth.SERIAL_PORT_CLASS],
                        profiles=[bluetooth.SERIAL_PORT_PROFILE],
                        # protocols=[bluetooth.OBEX_UUID]
                        )

print("Waiting for connection on RFCOMM channel", port)

client_sock, client_info = server_sock.accept()
print("Accepted connection from", client_info)

try:
while True:
    data = client_sock.recv(1024)
    if not data:
        break
    print("Received", data)
except OSError:
    pass

print("Disconnected.")

client_sock.close()
server_sock.close()
print("All done.")