diff --git a/gammu_receive_sms.sh b/gammu_receive_sms.sh
index 5205468..9b042e3 100644
--- a/gammu_receive_sms.sh
+++ b/gammu_receive_sms.sh
@@ -3,35 +3,58 @@
 SECRETKEY=''
 PHONENUM=''
 
+PATH_UNLOCK_FILE="/tmp/gammu_unlock_file"
 
 DATE=`date --date="2 minute ago" +'%Y-%m-%d %H:%M:%S'`
 OTP=`oathtool -w 4 --now="$DATE" --totp -b  $SECRETKEY`
 
 OTPFROMCLIENT=`echo $SMS_1_TEXT | awk '{print $NF}'`
-CMD=`echo $SMS_1_TEXT | awk '{print tolower($1)}'`
-TEXT=`echo $SMS_1_TEXT | awk 'BEGIN {ORS=" "} {for (i=2; i<NF; i++) print $i}'`
+CMD=`echo $SMS_1_TEXT | awk '{print tolower($1)}'``
 MATCH=`echo $OTP | grep $OTPFROMCLIENT`
 
+UNLOCKDATE=`cat $PATH_UNLOCK_FILE`
+CURRENTDATE=`date +%s`
+DIFFDATE=$(($CURRENTDATE-$UNLOCKDATE))
+
+if [[ "$DIFFDATE" -lt "1800" ]];then
+	TEXT=`echo $SMS_1_TEXT | awk 'BEGIN {ORS=" "} {for (i=2; i<=NF; i++) print $i " "}'`
+else
+	TEXT=`echo $SMS_1_TEXT | awk 'BEGIN {ORS=" "} {for (i=2; i<NF; i++) print $i " "}'`
+fi
+
+
 if [[ $SMS_1_NUMBER -eq $PHONENUM ]]; then
-        if [[ -n $MATCH ]] ;then
+	if [ -n "$MATCH" ] || [ "$DIFFDATE" -lt "1800" ] ; then
                 case $CMD in
                         allo)
                                 REPLY="A l'huile"
                                 ;;
+						help)
+								REPLY="PING \$HOST - ping un host; UNLOCK - déverrouille pendant 30 le mode OTP; LOCK - verrouille le mode unlock; REBOOT \$HOST - redémarre l'host distant; CMD \$HOST \$COMMAND - exécute une commande sur l'host distant; PXY \$NUM \$MESSAGE - Envoie un SMS avec le module"
+								;;
                         ping)
                                 REPLY=`ping -n -c 2 $TEXT`
                                 ;;
+						unlock)
+								date +%s > $PATH_UNLOCK_FILE
+								REPLY="Système débloqué pour 30 min"
+								;;
+						lock)
+								echo "0" > $PATH_UNLOCK_FILE
+								REPLY="Système re-verouillé"
+								;;
                         reboot)
                                 ssh root@"$TEXT" 'sudo reboot'
                                 REPLY="Signal reboot envoyé"
                                 ;;
                         cmd)
                                 HOST=`echo $TEXT | awk '{print $1}'`
-                                COMMAND=`echo $TEXT | awk 'BEGIN {ORS=" "} {for (i=2; i<=NF; i++) print $i}'`
+                                COMMAND=`echo $TEXT | awk 'BEGIN {ORS=" "} {for (i=2; i<=NF; i++) print $i " "}'`
                                 REPLY=`ssh -oStrictHostKeyChecking=no root@$HOST $COMMAND`
+                                ;;
                         pxy)
                                 PHONENUM=`echo $TEXT | awk '{print $1}'`
-                                REPLY=`echo $TEXT | awk 'BEGIN {ORS=" "} {for (i=2; i<=NF; i++) print $i}'`
+                                REPLY=`echo $TEXT | awk 'BEGIN {ORS=" "} {for (i=2; i<=NF; i++) print $i " "}'`
                         		;;
                         *)
                                 REPLY="Commande inconnu"