diff --git a/kineintercom/intercom.py b/kineintercom/intercom.py
index 25e8128..ae6f945 100644
--- a/kineintercom/intercom.py
+++ b/kineintercom/intercom.py
@@ -142,7 +142,7 @@ def send_at_cmd(cmd='', timeout=0.0, serObj=None, logger=None):
         while serObj.in_waiting > 0:
             # remove \r and \n chars from out string
             out += serObj.read_until().decode('utf-8', 'replace').replace('\r','').replace('\n','')
-            if out != '':
+            if out != '' and not out.startswith('NORMAL POWER DOWN'):
                 outlst.append(out)
             out = ''
             time.sleep(timeout)
@@ -206,6 +206,7 @@ def set_sim_pin(serObj=None, pin_actif=False, code_pin="", logger=None):
         return False
     elif ret == 1:
         logger.warning("Timeout avec la commande AT: {}".format('AT+CPIN?'))
+        return False
     else:
         for item in rsp:
             if item.startswith('+CPIN:'):
@@ -226,6 +227,7 @@ def set_sim_pin(serObj=None, pin_actif=False, code_pin="", logger=None):
                             return False
                         elif ret == 1:
                             logger.warning("Timeout avec la commande AT: {}".format('AT+CPIN=<CODE_PIN>'))
+                            return False
                         else:
                             logger.info("code PIN validé ...")
                 elif item.split('+CPIN: ')[1] == 'READY':
@@ -794,8 +796,8 @@ def main():
                 sys.exit(1)
             else:
                 GSM_MODULE_STATE = True
-            # Attente de 10 secondes avant d'initier l'init GSM
-            time.sleep(10)
+        # Attente de 10 secondes avant d'initier l'init GSM
+        time.sleep(10)
         # Initialize GSM communication
         logger.info("Initialisation des commandes AT nécessaires ...")
         ret = init_gsm_com(serObj=ser, config=config, logger=logger)
diff --git a/misc/kineintercom.service b/misc/kineintercom.service
index 2502c5f..4ffb310 100644
--- a/misc/kineintercom.service
+++ b/misc/kineintercom.service
@@ -2,6 +2,7 @@
 Description=Démarrage du processus KineIntercom
 StartLimitIntervalSec=300
 StartLimitBurst=5
+After=getty.target
 
 [Service]
 Type=simple
diff --git a/template/kineintercommisc.postinst b/template/kineintercommisc.postinst
index 0dba3bd..c64c6ed 100644
--- a/template/kineintercommisc.postinst
+++ b/template/kineintercommisc.postinst
@@ -22,6 +22,7 @@ dirname="kineintercom"
 # create log directory
 /usr/bin/mkdir -p /var/log/$dirname
 /usr/bin/chown -R $user:$userpi /var/log/$dirname
+/usr/bin/chmod -R 770 /var/log/$dirname
 
 # Restart service
 /usr/bin/systemctl enable kineintercom.service