potential fix

SP5WWP/testing/m17-sms.sh

@@ -20,6 +20,6 @@ len_chars=${#str} #get length in characters rather than bytes
 #echo the message to the encoder
 str1=${str:0:$((len_chars-1))}
 str2=${str: -1}
-echo -en "\x05"$str1\'$str2\'"\x00" | m17-packet-encode -S $2 -D $1 -C $3 -n $len -o $5
+echo -en "\x05"$str1$str2"\x00" | m17-packet-encode -S $2 -D $1 -C $3 -n $len -o $5
 sox -t raw -r 48000 -b 16 -c 1 -L -e signed-integer $5 $5".wav"