diff --git a/config.py b/config.py
index 7190b56..af05ebf 100644
--- a/config.py
+++ b/config.py
@@ -21,7 +21,7 @@ ARCHIVE_KEEP_INTERVAL = 365 * 24 * 60 * 60 # 1 year
 MAX_MISSING = 0.5
 
 # Manual claims poly should be 0x8404, internet says xmodem
-CRC_TYPE = 'xmodem'
+CRC_TYPE = 'crc-aug-ccitt'
 
 
 STORED_VALUES = [
diff --git a/update.py b/update.py
index f873da6..c7bc6c4 100644
--- a/update.py
+++ b/update.py
@@ -12,13 +12,17 @@ calc_crc = crcmod.predefined.mkCrcFun(CRC_TYPE)
 
 def parse_line(line):
     if line[-2:] != "\r\n":
+        print("newline fucked")
         return {key : None for key in FORMAT}
     line = line[:-2]
 
-    crc_str = line[-2:]
-    payload = line[0:-2]
-    crc = (ord(crc_str[0]) << 8) | ord(crc_str[1])
+    crc_str = line[-4:]
+    print(crc_str)
+    payload = line[0:-4]
+    crc = int(crc_str, 16)
+    calced_crc = calc_crc(payload.encode('ascii'))
     if crc != calc_crc(payload.encode('ascii')):
+        print("CRC fucked")
         return {key : None for key in FORMAT}
 
     parts = payload.split(';')
@@ -74,7 +78,7 @@ def update_graphs():
         # Render current data
         graph_params = ['%s.png' % graph_name, '-a',
                         'PNG', '-s', 'n-%d' % ARCHIVE_INTERVAL]
-        
+
         for name, lable, color in lines:
             graph_params += ['DEF:%s=%s:%s:LAST' % (name, DATA_FILE, name)]
             graph_params += ['LINE1:%s%s:%s' % (name, color, lable)]