For HBP, we can use a sha1 digest- 2

bridge_master.py

@@ -40,7 +40,7 @@ import re
 import copy
 from setproctitle import setproctitle
 #from crccheck.crc import Crc32
-from hashlib import sha1
+from hashlib import hashlib.sha1
 
 # Twisted is pretty important, so I keep it separate
 from twisted.internet.protocol import Factory, Protocol
@@ -2066,7 +2066,7 @@ class routerHBP(HBSYSTEM):
         _bits = _data[15]
         
         #_pkt_crc = Crc32.calc(_data[4:53])
-        _pkt_crc = sha1(_data).digest()
+        _pkt_crc = hashlib.sha1(_data).digest()
         
         _nine = bytes_3(9)