diff --git a/hbmqtt/utils.py b/hbmqtt/utils.py
new file mode 100644
index 0000000..ec99bea
--- /dev/null
+++ b/hbmqtt/utils.py
@@ -0,0 +1,10 @@
+# Copyright (c) 2015 Nicolas JOUANIN
+#
+# See the file license.txt for copying permission.
+
+
+def bytes_to_hex_str(data):
+    return '0x' + ''.join(format(b, '02x') for b in data)
+
+def hex_to_int(data):
+    return int.from_bytes(data, byteorder='big')
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