diff --git a/python/biopro/server/_identify.py b/python/biopro/server/_identify.py
index f9a5009..f7eafc4 100644
--- a/python/biopro/server/_identify.py
+++ b/python/biopro/server/_identify.py
@@ -9,23 +9,9 @@ _jwt = None
 
 def controller_device_id() -> str:
     ### device ID
-    return 'b8:27:eb:52:ea:97'
-    ret = None
-    try:
-        with open('/etc/BPS/device_id') as f:
-            for line in f:
-                if line.startswith('#'):
-                    continue
-
-                ret = line.strip()
-                break
-    except FileNotFoundError:
-        pass
-
-    if ret is None or len(ret) == 0:
-        return str(uuid.uuid1())
-    else:
-        return ret
+    f = open("/sys/class/net/eth0/address", "r")
+    mac = f.read()[:-1]
+    return mac
 
 def get_api_jwt() -> str:
     global _jwt