diff --git a/xml_reader.py b/xml_reader.py
index 45cd30a..f2b0e3e 100644
--- a/xml_reader.py
+++ b/xml_reader.py
@@ -59,6 +59,7 @@ class Xml_reader:
             "Device[@name='%s']/Port" % device_name)
         return {
             'protocol': port.get('protocol'),
+            'frequency': port.get('frequency') if port.get('frequency') != None else '',
             'pins': [
                 pin.text for pin in self.root.findall(
                     "Device[@name='%s']/Port/Pin" % device_name
@@ -66,10 +67,9 @@ class Xml_reader:
                 ]
         }
 
-# ##test
-# xml_reader = Xml_reader('XML/Test.xml','XML/config.xsd')
-# print(xml_reader.get_device_names)
-# print(xml_reader.get_value_info("example"))
-# print(xml_reader.get_port("example"))
-# print(xml_reader.get_value_info("sensorarray"))
-# print(xml_reader.get_port("sensorarray"))
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+##test
+xml_reader = Xml_reader('XML/Test.xml','XML/config.xsd')
+print(xml_reader.get_device_names)
+print(xml_reader.get_port("example"))
+print(xml_reader.get_port("PWM_example"))
+print(xml_reader.get_port("sensorarray"))
\ No newline at end of file