popufare/busunit/debug/piu-message

#!/bin/bash
#
# Copyright (c) 2019 Clementine Computing LLC.
# 
# This file is part of PopuFare.
# 
# PopuFare is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# 
# PopuFare is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
# 
# You should have received a copy of the GNU Affero General Public License
# along with PopuFare.  If not, see <https://www.gnu.org/licenses/>.
#

msg="$1"
pfx="$2"
if [[ "$msg" == "" ]] ; then
  echo "usage:"
  echo ""
  echo "  piu-message <msg> [PIULine]"
  echo ""
  echo "    PIULine is 0 or 1"
  echo ""
  exit -1
fi

if [[ "$pfx" == "" ]] ; then
  pfx='0'
fi

echo -e '/'$pfx':'$msg'\r' >> /dev/ttyPIU