diff --git a/APED/app/src/main/java/com/example/aped/ui/plots/PlotFragment.java b/APED/app/src/main/java/com/example/aped/ui/plots/PlotFragment.java
index 394a6f1..48b34fb 100644
--- a/APED/app/src/main/java/com/example/aped/ui/plots/PlotFragment.java
+++ b/APED/app/src/main/java/com/example/aped/ui/plots/PlotFragment.java
@@ -95,13 +95,21 @@ public class PlotFragment extends Fragment {
                     for (String pin : (List<String>) (xml.getPort(deviceName))
                             .get("pins")) {
                         String valueString = buffer.getString(pin);
+                        if (valueString.equals("[]")) {
+                            continue;
+                        }
                         valueString = valueString
                                 .substring(2, valueString.length() - 2);
                         String[] valueStringArray = valueString
                                 .split("', '");
                         int[] values = new int[valueStringArray.length];
                         for (int i = 0; i < valueStringArray.length; i++) {
-                            values[i] = Integer.parseInt(valueStringArray[i]);
+                            if (valueStringArray[i].equals("None")) {
+                               values[i] = 0;
+                            } else {
+                               values[i] = Integer.parseInt(
+                                       valueStringArray[i]);
+                            }
                         }
 
                         //display data