diff --git a/.gitignore b/.gitignore
index 1a6f92c..acd1e27 100644
--- a/.gitignore
+++ b/.gitignore
@@ -240,4 +240,4 @@ cython_debug/
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
 .idea/
-
+log*.txt
diff --git a/logger.py b/logger.py
new file mode 100644
index 0000000..570e8a8
--- /dev/null
+++ b/logger.py
@@ -0,0 +1,9 @@
+import time
+
+
+def logwriter(val, logpath, warn):
+    with open(logpath, "a") as logfile:
+        if not warn:
+            logfile.write("{}: Value was {}\n".format(time.time(), val))
+        else:
+            logfile.write("{}: WARNING! Value was {}, too high\n".format(time.time(), val))
diff --git a/logging.py b/logging.py
deleted file mode 100644
index 648c121..0000000
--- a/logging.py
+++ /dev/null
@@ -1,6 +0,0 @@
-import time
-
-
-def log(val):
-    with open(log.txt) as logfile:
-        logfile.write("{}: Value was {}".format(time.time(), val))
diff --git a/receiver.py b/receiver.py
index 3b3e1de..ccdbc85 100644
--- a/receiver.py
+++ b/receiver.py
@@ -2,10 +2,14 @@ import send_test_data
 import json
 import matplotlib.pyplot as plt
 import numpy as np
+from logger import logwriter
+import time
 
 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]
+logpath = "log{}.txt".format(time.time())
+logs = True
 
 try:
     for data in send_test_data.data_test_forever():
@@ -15,11 +19,13 @@ try:
 
         # draw graph
         fig, ax = plt.subplots()
-        if currentdata["V"] > 150:
+        if currentdata["V"] > 160:
             ax.set_facecolor('red')
             ax.plot(times[:len(data_buffer)], data_buffer, 'k')
+            warn = True
         else:
             ax.plot(times[:len(data_buffer)], data_buffer)
+            warn = False
         ax.set_xlabel('Time [100 ms]')
         ax.set_ylabel('Value randomness')
         ax.set_title('Value randomness over time')
@@ -27,5 +33,7 @@ try:
         plt.yticks(np.arange(0, 257, 32))
         plt.show()
         plt.close()
+        if logs:
+            logwriter(currentdata["V"], logpath, warn)
 except KeyboardInterrupt:
     exit(0)