You may like to check Net::SSH::Any. It works on top of Net::SSH2 (and other SSH modules), and provides a much higher level and easy to use API.

It also takes into account a lot of Net::SSH2 quirks and corner cases you are not handling. 

my $ssh = Net::SSH::Any->new(..., backend => 'Net_SSH2');

my ($out, $err) = $ssh->capture2({stdin_data => $sendtext}, $cmd);

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In reply to Re: Writing to an SSH channel by salva
in thread Writing to an SSH channel by BernieC

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