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@@ -0,0 +1,37 @@
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+#!/bin/bash
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+#
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+# Copyright (c) 2019 Clementine Computing LLC.
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+#
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+# This file is part of PopuFare.
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+#
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+# PopuFare is free software: you can redistribute it and/or modify
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+# it under the terms of the GNU Affero General Public License as published by
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+# the Free Software Foundation, either version 3 of the License, or
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+# (at your option) any later version.
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+#
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+# PopuFare is distributed in the hope that it will be useful,
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+# but WITHOUT ANY WARRANTY; without even the implied warranty of
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+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+# GNU Affero General Public License for more details.
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+#
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+# You should have received a copy of the GNU Affero General Public License
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+# along with PopuFare. If not, see <https://www.gnu.org/licenses/>.
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+#
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+
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+msg="$1"
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+pfx="$2"
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+if [[ "$msg" == "" ]] ; then
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+ echo "usage:"
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+ echo ""
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+ echo " piu-message <msg> [PIULine]"
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+ echo ""
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+ echo " PIULine is 0 or 1"
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+ echo ""
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+ exit -1
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+fi
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+
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+if [[ "$pfx" == "" ]] ; then
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+ pfx='0'
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+fi
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+
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+echo -e '/'$pfx':'$msg'\r' >> /dev/ttyPIU
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