[Hilo] How to cancel a FTP download?

Answer: KFTPRCV can be cancelled after “CONNECT” by following ways:
1/ Sending any character, then “ERROR” returned.
2/ Turning off DTR when AT&D1, then “OK” returned.
3/ Turning off DTR when AT&D2). Then “NO CARRIER” returned.
And at the end module will give indication “+KFTP_ERROR: 0, 426”.