diff --git a/rest/series.py b/rest/series.py
index 683094f..51572a4 100644
--- a/rest/series.py
+++ b/rest/series.py
@@ -10,6 +10,17 @@ SQLITE_LOCATION = Config.get("Storage", "sqlite_location")
 
 
 class Series(Resource):
+    def __init__(self):
+        self._cpuserial = "0000000000000000"
+        try:
+            f = open('/proc/cpuinfo','r')
+            for line in f:
+                if line[0:6]=='Serial':
+                    self._cpuserial = line[10:26]
+                    f.close()
+        except:
+            self._cpuserial = "ERROR000000000"
+
     def get(self):
         format = request.args['format']
         limit = int(request.args.get('limit', 20))
@@ -32,22 +43,21 @@ class Series(Resource):
         conn.close()
 
         if format == 'json':
-            return Series._get_json(col_names, data)
+            return self._get_json(col_names, data)
         elif format == 'csv':
-            return Series._get_csv(col_names, data)
+            return self._get_csv(col_names, data)
 
-    @staticmethod
-    def _get_json(col_names, data):
+    def _get_json(self, col_names, data):
         items = []
         for row in data:
             item = {}
+            item['HardwareSerial'] = self._cpuserial
             for i in range(len(col_names)):
                 item[col_names[i]] = row[i]
             items.append(item)
         return items
 
-    @staticmethod
-    def _get_csv(col_names, data):
+    def _get_csv(self, col_names, data):
         """
         Write CSV export to memory
         """