diff --git a/MQTT.py b/MQTT.py
index f369b46..b49b19b 100755
--- a/MQTT.py
+++ b/MQTT.py
@@ -3,6 +3,7 @@ import os
 import time
 import paho.mqtt.client as mqtt
 
+from device import device_name
 from tool import push_stream, close_stream, update, exec_sh, get_record, get_list_record, get_status
 
 
@@ -19,7 +20,7 @@ def valid(msg, client):
     if 'device_name' not in origin_data:
         client.publish('error', payload='device_name must be supplied', qos=0)
         return False
-    if os.getenv('device_name').strip() != origin_data['device_name']:
+    if device_name != origin_data['device_name']:
         return False
     return True
 
@@ -71,7 +72,7 @@ def exec_shutdown():
 if __name__ == '__main__':
     while True:
         try:
-            client = mqtt.Client(client_id=os.getenv('device_name').strip())
+            client = mqtt.Client(client_id=device_name)
             client.username_pw_set("demo", "123456")
             # Specify callback function
             client.on_connect = on_connect
diff --git a/data_upload.py b/data_upload.py
index 46b86c8..92bb152 100755
--- a/data_upload.py
+++ b/data_upload.py
@@ -3,6 +3,8 @@ import subprocess
 import time
 import paho.mqtt.client as mqtt
 
+from device import device_name
+
 
 def on_connect(client, userdata, flags, rc):
     global times
@@ -21,7 +23,7 @@ times = 3
 if __name__ == '__main__':
     while True:
         try:
-            client = mqtt.Client(client_id=os.getenv('device_name').strip())
+            client = mqtt.Client(client_id=device_name)
             client.username_pw_set("demo", "123456")
             # Specify callback function
             client.on_connect = on_connect
diff --git a/device.py b/device.py
index fa05591..de7b687 100644
--- a/device.py
+++ b/device.py
@@ -1,5 +1,7 @@
+import os
 import subprocess
 
-p = subprocess.Popen(['cat /home/pi/device_name'], shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
-out, err = p.communicate()
-device_name = out.decode('utf-8').strip()
+# p = subprocess.Popen(['cat /home/pi/device_name'], shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+# out, err = p.communicate()
+# device_name = out.decode('utf-8').strip()
+device_name = os.getenv('device_name').strip()
diff --git a/sensor_to_local.py b/sensor_to_local.py
index 52ac798..7eff865 100755
--- a/sensor_to_local.py
+++ b/sensor_to_local.py
@@ -5,6 +5,7 @@ import serial
 
 from db.models.lot_data_model import LOT_DATA
 from api import add
+from device import device_name
 
 
 def local():
@@ -210,7 +211,7 @@ def test():
                 'wind_speed': 1,
                 'wind_direction': 1,
                 'create_time': int(time.time()),
-                'device_name': os.getenv('device_name')
+                'device_name': device_name
                 }
         t2 = LOT_DATA(**data)
         add(t2)
diff --git a/sensor_to_server.py b/sensor_to_server.py
index 126624b..0b6a6c7 100755
--- a/sensor_to_server.py
+++ b/sensor_to_server.py
@@ -8,6 +8,7 @@ import paho.mqtt.client as mqtt
 
 from api import add
 from db.models.lot_data_model import LOT_DATA
+from device import device_name
 
 
 def t():
@@ -226,7 +227,7 @@ def on_connect(client, userdata, flags, rc):
 
 
 if __name__ == '__main__':
-    client = mqtt.Client(client_id=os.getenv('device_name').strip())
+    client = mqtt.Client(client_id=device_name)
     client.username_pw_set("demo", "123456")
     # Specify callback function
     client.on_connect = on_connect