network script syntax problem

#!/usr/bin/env bash
# file: $0 - script to find useable connection on hughsnet.
let CONNECT=0
while [ $CONNECT -lt 1 ]; do
     sudo -H dhcpcd -k 2>&1 >/dev/null
         sudo -H dhcpcd
ST=$( ping -c 5 8.8.8.8|tail -2 )
if [ $ST !='connect: Network is unreachable' ]; then
CONNECT=CONNECT+1
fi
done

The ST variable doesn't capture the search string the if statement is 
needing to find.  Putting parentheses around a command appears only to 
capture output of a command and send it to stdout or stderr.  In case of 
bad network connections this script first kills dhcp then reconnects.  If 
successful it need only happen once.

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