diff --git a/osect_sensor/Application/edge_cron/cron/management/commands/pcap_to_log_to_server.py b/osect_sensor/Application/edge_cron/cron/management/commands/pcap_to_log_to_server.py
old mode 100644
new mode 100755
index 8097b22..2e1c933
--- a/osect_sensor/Application/edge_cron/cron/management/commands/pcap_to_log_to_server.py
+++ b/osect_sensor/Application/edge_cron/cron/management/commands/pcap_to_log_to_server.py
@@ -16,6 +16,7 @@
 
 import requests
 import zstandard as zstd
+import serial
 from common.common_config import (
     ALLOWED_LOG_EXT,  # BACNET_SHELL_COMMAND,
     ALLOWED_PCAP_EXT,
@@ -146,7 +147,17 @@ def handle(self, *args, **options):
         # logger.info("sleep " + str(sleep_time) + "s")
 
         try:
-            send_server(tar_list)
+            # コア網チェック
+            with serial.Serial('/dev/ttyUSB1', baudrate=115200, timeout=1) as sara:
+                sara.write(b'at\r\n')
+                b=sara.read(16)
+                cnum=b.decode().split("\n")
+
+            if "OK\r" in cnum:
+                # ログ送信
+                send_server(tar_list)
+            else:
+                logger.error("can not send compressed file. Unable to connect to closed network. ")
         except Exception as e:
             logger.error("can not send compressed file. " + str(e))
 
diff --git a/osect_sensor/docker-compose.yml b/osect_sensor/docker-compose.yml
old mode 100644
new mode 100755
index 51be15d..5612731
--- a/osect_sensor/docker-compose.yml
+++ b/osect_sensor/docker-compose.yml
@@ -3,6 +3,8 @@ services:
   edge_cron:
     image: cron:revxxx
     build: "./Infrastructure/edge_cron/"
+    devices:
+      - "/dev/ttyUSB1:/dev/ttyUSB1"
     volumes:
       - ./Application/edge_cron:/opt/edge_cron
       - pcap-logs-volume:/opt/edge_cron/paper/sc_src/input/pcap/complete/