hopefully final fix

SP5WWP/testing/m17-sms.sh

@@ -15,11 +15,8 @@ str=$4
 #get the size in bytes
 len=$(echo -n "$str" | wc -c)  #get UTF-8 encoded length in bytes
 len=$((len+2))  #add 2 additional bytes (0x05 and 0x00)
-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 $5
+echo -en '\x05'$str'\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"