Hola buenas, alguien ha solucionado el problema y como, cuando te sale lo siguiente
start send upgclient
Start to check serial...
!! UpgClientTest FAIL: Can not receive any responses from STB!!
!! UpgClientTest FAIL: Can not receive any responses from STB!!
!! UpgClientTest FAIL: Can not receive any responses from STB!!
!! UpgClientTest FAIL: RSP error!!
muchas gracias y un saludo a todos