diff --git a/eSSP/__init__.py b/eSSP/__init__.py
index 0532ca8..a5decb7 100644
--- a/eSSP/__init__.py
+++ b/eSSP/__init__.py
@@ -181,11 +181,13 @@ class NV11(eSSP):
     get_serial_number = generic_command(0xc)
 
     def unit_data(self):
-        (status, dev_type, fw_ver, currency, _rest) = self.send_unpack('<BB4s3sI', 0x0d)
-        proto_ver = _rest >> 24
-        value_multiplier = _rest & 0xffffff
+        (dev_type, fw_ver, currency, _rest) = self.send_unpack('>B4s3sI', 0x0d)
 
-        return (status, dev_type, fw_ver, currency, value_multiplier, proto_ver)
+        # _rest contains two fields, protocol version and value multiplier
+        proto_ver = _rest & 0xff
+        value_multiplier = _rest >> 8
+
+        return (dev_type, fw_ver, currency, value_multiplier, proto_ver)
 
     setup_request = generic_command(0x5)