The java programUnlike the java program, read_serial.pl is buffering its output.

Possible solutions:

• If it provides such an option, you could configure it so it doesn't buffer its output.

• You could change it so doesn't buffer its output. (e.g. By adding $|=1;)

• You should be able to fool it by using a pseudo-tty instead of a pipe. See IPC::Run.

Update: Ah! Read it backwards! It's when using a Perl child that it didn't work.

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