Implemented logging, improved graph presentation

receiver.py

@@ -7,6 +7,7 @@ data_store = []
 data_buffer = []
 times = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20]
 
+try:
     for data in send_test_data.data_test_forever():
         currentdata = json.loads(data)
         data_store.append(currentdata["V"])
@@ -14,8 +15,17 @@ for data in send_test_data.data_test_forever():
 
         # draw graph
         fig, ax = plt.subplots()
+        if currentdata["V"] > 150:
+            ax.set_facecolor('red')
+            ax.plot(times[:len(data_buffer)], data_buffer, 'k')
+        else:
             ax.plot(times[:len(data_buffer)], data_buffer)
+        ax.set_xlabel('Time [100 ms]')
+        ax.set_ylabel('Value randomness')
+        ax.set_title('Value randomness over time')
         plt.xticks(np.arange(1, 21, 1))
         plt.yticks(np.arange(0, 257, 32))
         plt.show()
         plt.close()
+except KeyboardInterrupt:
+    exit(0)