Bash needs to send a command to another CLI

I want to automate some command the thing is we login to the server and the next commandline isn't a linux commandline but rather that of an application it self. My current attempt of solution is the following. #!/bin/bash # smsme.sh i=0 i=$((i+1)) rancli sleep 3 echo add saf dest=4949 orig=Wim text=$i sleep 120; # --- Quick hint it breaks on add. I tried piping the commands as well it just echoed in the linux enverimont without ever hitting the rancli Updated scripts after update #!/bin/bash # smsme.sh i=0 i=$((i+1)) rancli read $reply Answer script #!/usr/bin/env expect set timeout -1 spawn ./smsme.sh expect { "Quortus Core CLI (c) 2019 No entry for terminal type "xterm-256color"; using dumb terminal settings. Connecting to RAN at 127.0.0.1:3012QCore> LTE64b>" } eof } send -- add saf dest=4949 orig=Wim text=wim expect "Submitted, message number $1" expect eof