FAILS WITH THIS CODE:
rssi_val = -(256-ord(pkt.notdecoded[-4:-3]))
print(rssi_val)

ERROR:
[I] probeSniffer stopped.Fatal Python error: could not acquire lock for <_io.BufferedWriter name='<stdout>'> at interpreter shutdown, possibly due to daemon threads

Thread 0x00007fde47fff700 (most recent call first):
  File "probeSniffer.py", line 129 in stop
  File "probeSniffer.py", line 181 in PacketHandler
  File "/usr/lib/python3.6/site-packages/scapy/sendrecv.py", line 599 in sniff
  File "probeSniffer.py", line 156 in sniffer
  File "/usr/lib/python3.6/threading.py", line 864 in run
  File "/usr/lib/python3.6/threading.py", line 916 in _bootstrap_inner
  File "/usr/lib/python3.6/threading.py", line 884 in _bootstrap

Thread 0x00007fde4cdfc700 (most recent call first):
  File "probeSniffer.py", line 145 in chopping
  File "/usr/lib/python3.6/threading.py", line 864 in run
  File "/usr/lib/python3.6/threading.py", line 916 in _bootstrap_inner
  File "/usr/lib/python3.6/threading.py", line 884 in _bootstrap