Implemented logging, improved graph presentation

receiver.py

@@ -7,15 +7,25 @@ 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]
 
-for data in send_test_data.data_test_forever():
-    currentdata = json.loads(data)
-    data_store.append(currentdata["V"])
-    data_buffer = data_store[-20:]
+try:
+    for data in send_test_data.data_test_forever():
+        currentdata = json.loads(data)
+        data_store.append(currentdata["V"])
+        data_buffer = data_store[-20:]
 
-    # draw graph
-    fig, ax = plt.subplots()
-    ax.plot(times[:len(data_buffer)], data_buffer)
-    plt.xticks(np.arange(1, 21, 1))
-    plt.yticks(np.arange(0, 257, 32))
-    plt.show()
-    plt.close()
+        # 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)