diff --git a/sniffer/tools/sniffer.py b/sniffer/tools/sniffer.py
index 9d29a51..07ea50e 100755
--- a/sniffer/tools/sniffer.py
+++ b/sniffer/tools/sniffer.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
-'''
+"""
 (C) 2012, Mariano Alvira <mar@devl.org>
 (C) 2014, Oliver Hahm <oliver.hahm@inria.fr>
 (C) 2015, Hauke Petersen <hauke.petersen@fu-berlin.de>
@@ -30,7 +30,7 @@
 LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 SUCH DAMAGE.
-'''
+"""
 
 from __future__ import print_function
 import argparse
@@ -42,13 +42,13 @@
 from serial import Serial
 
 # PCAP setup
-MAGIC = 0xa1b2c3d4
+MAGIC = 0xA1B2C3D4
 MAJOR = 2
 MINOR = 4
 ZONE = 0
 SIG = 0
-SNAPLEN = 0xffff
-NETWORK = 230       # 802.15.4 no FCS
+SNAPLEN = 0xFFFF
+NETWORK = 230  # 802.15.4 no FCS
 
 DEFAULT_BAUDRATE = 115200
 
@@ -56,45 +56,44 @@
 def configure_interface(port, channel):
     line = ""
     iface = 0
-    port.write('ifconfig\n'.encode())
+    port.write("ifconfig\n".encode())
     while True:
         line = port.readline()
-        if line == b'':
-            print("Application has no network interface defined",
-                  file=sys.stderr)
+        if line == b"":
+            print("Application has no network interface defined", file=sys.stderr)
             sys.exit(2)
-        match = re.search(r'^Iface +(\d+)', line.decode(errors="ignore"))
+        match = re.search(r"^Iface +(\d+)", line.decode(errors="ignore"))
         if match is not None:
             iface = int(match.group(1))
             break
 
     # set channel, raw mode, and promiscuous mode
-    print('ifconfig %d set chan %d' % (iface, channel), file=sys.stderr)
-    print('ifconfig %d raw' % iface, file=sys.stderr)
-    print('ifconfig %d promisc' % iface, file=sys.stderr)
-    port.write(('ifconfig %d set chan %d\n' % (iface, channel)).encode())
-    port.write(('ifconfig %d raw\n' % iface).encode())
-    port.write(('ifconfig %d promisc\n' % iface).encode())
+    print("ifconfig %d set chan %d" % (iface, channel), file=sys.stderr)
+    print("ifconfig %d raw" % iface, file=sys.stderr)
+    print("ifconfig %d promisc" % iface, file=sys.stderr)
+    port.write(("ifconfig %d set chan %d\n" % (iface, channel)).encode())
+    port.write(("ifconfig %d raw\n" % iface).encode())
+    port.write(("ifconfig %d promisc\n" % iface).encode())
 
 
 def generate_pcap(port, out):
     # count incoming packets
     count = 0
     # output overall PCAP header
-    out.write(pack('<LHHLLLL', MAGIC, MAJOR, MINOR, ZONE, SIG, SNAPLEN,
-                   NETWORK))
+    out.write(pack("<LHHLLLL", MAGIC, MAJOR, MINOR, ZONE, SIG, SNAPLEN, NETWORK))
     sys.stderr.write("RX: %i\r" % count)
     while True:
         line = port.readline().rstrip()
 
-        pkt_header = re.match(r">? *rftest-rx --- len (\w+).*",
-                              line.decode(errors="ignore"))
+        pkt_header = re.match(
+            r">? *rftest-rx --- len (\w+).*", line.decode(errors="ignore")
+        )
         if pkt_header:
             now = time()
             sec = int(now)
             usec = int((now - sec) * 1000000)
             length = int(pkt_header.group(1), 16)
-            out.write(pack('<LLLL', sec, usec, length, length))
+            out.write(pack("<LLLL", sec, usec, length, length))
             out.flush()
             count += 1
             sys.stderr.write("RX: %i\r" % count)
@@ -102,10 +101,10 @@ def generate_pcap(port, out):
 
         pkt_data = re.match(r"(\w\w )+", line.decode(errors="ignore"))
         if pkt_data:
-            for part in line.decode(errors="ignore").split(' '):
+            for part in line.decode(errors="ignore").split(" "):
                 byte = re.match(r"(\w\w)", part)
                 if byte:
-                    out.write(pack('<B', int(byte.group(1), 16)))
+                    out.write(pack("<B", int(byte.group(1), 16)))
             out.flush()
 
 
@@ -114,15 +113,14 @@ def connect(args):
     if args.conn.startswith("/dev/tty") or args.conn.startswith("COM"):
         # open serial port
         try:
-            conn = Serial(args.conn, args.baudrate, dsrdtr=0, rtscts=0,
-                          timeout=1)
+            conn = Serial(args.conn, args.baudrate, dsrdtr=0, rtscts=0, timeout=1)
         except IOError:
             print("error opening serial port %s" % args.conn, file=sys.stderr)
             sys.exit(2)
     else:
         try:
             port = args.conn.split(":")[-1]
-            host = args.conn[:-(len(port)+1)]
+            host = args.conn[: -(len(port) + 1)]
             port = int(port)
         except (IndexError, ValueError):
             print("Can't parse host:port pair %s" % args.conn, file=sys.stderr)
@@ -143,17 +141,29 @@ def main():
     else:
         default_outfile = sys.stdout
     p = argparse.ArgumentParser()
-    p.add_argument("-b", "--baudrate", type=int, default=DEFAULT_BAUDRATE,
-                   help="Baudrate of the serial port (only evaluated "
-                        "for non TCP-terminal, default: %d)" %
-                        DEFAULT_BAUDRATE)
-    p.add_argument("conn", metavar="tty/host:port", type=str,
-                   help="Serial port or TCP (host, port) tuple to "
-                        "terminal with sniffer application")
+    p.add_argument(
+        "-b",
+        "--baudrate",
+        type=int,
+        default=DEFAULT_BAUDRATE,
+        help="Baudrate of the serial port (only evaluated "
+        "for non TCP-terminal, default: %d)" % DEFAULT_BAUDRATE,
+    )
+    p.add_argument(
+        "conn",
+        metavar="tty/host:port",
+        type=str,
+        help="Serial port or TCP (host, port) tuple to "
+        "terminal with sniffer application",
+    )
     p.add_argument("channel", type=int, help="Channel to sniff on")
-    p.add_argument("outfile", type=argparse.FileType("w+b"),
-                   default=default_outfile, nargs="?",
-                   help="PCAP file to output to (default: stdout)")
+    p.add_argument(
+        "outfile",
+        type=argparse.FileType("w+b"),
+        default=default_outfile,
+        nargs="?",
+        help="PCAP file to output to (default: stdout)",
+    )
     args = p.parse_args()
 
     conn = connect(args)
diff --git a/spectrum-scanner/tools/plot_rssi.py b/spectrum-scanner/tools/plot_rssi.py
index 4850d58..9db9b23 100755
--- a/spectrum-scanner/tools/plot_rssi.py
+++ b/spectrum-scanner/tools/plot_rssi.py
@@ -26,7 +26,6 @@
 
 
 class SpectrumEmitter(object):
-
     def __init__(self, port):
         self.port = port
 
@@ -35,7 +34,10 @@ def data_gen(self):
         while True:
             # Read one line from the spectrum device
             line = self.port.readline().rstrip()
-            pkt_data = re.match(r"\[([-+]?\d+),\s*([-+]?\d+),\s*([-+]?\d+)\]\s*(.*)", line.decode(errors='replace'))
+            pkt_data = re.match(
+                r"\[([-+]?\d+),\s*([-+]?\d+),\s*([-+]?\d+)\]\s*(.*)",
+                line.decode(errors="replace"),
+            )
             if pkt_data:
                 ed = {}
                 try:
@@ -60,7 +62,6 @@ def data_gen(self):
 
 
 class RSSIPlot(object):
-
     def __init__(self, ax, *args, tlen=120, dt=0.5, nchannels=27):
         self.ax = ax
         self.count = 0
@@ -68,13 +69,17 @@ def __init__(self, ax, *args, tlen=120, dt=0.5, nchannels=27):
         self.tlen = tlen
         # Generate mesh for plotting, this creates a grid of nchannel rows and
         # (tlen / dt) columns
-        self.Y, self.X = np.mgrid[slice(0 - .5, nchannels + 0.5, 1),
-                                  slice(-self.tlen - self.dt / 2, 0 + 1 - self.dt / 2, self.dt)]
+        self.Y, self.X = np.mgrid[
+            slice(0 - 0.5, nchannels + 0.5, 1),
+            slice(-self.tlen - self.dt / 2, 0 + 1 - self.dt / 2, self.dt),
+        ]
         Z = np.zeros_like(self.X)
         # X and Y are the bounds, so Z should be the value *inside* those bounds.
         # Therefore, remove the last row and column from the Z array.
         self.Z = Z[:-1, :-1]
-        self.pcm = self.ax.pcolormesh(self.X, self.Y, self.Z, vmin=-100, vmax=-20, cmap=plt.cm.get_cmap('jet'))
+        self.pcm = self.ax.pcolormesh(
+            self.X, self.Y, self.Z, vmin=-100, vmax=-20, cmap=plt.cm.get_cmap("jet")
+        )
         self.ax.get_figure().colorbar(self.pcm, label="Measured signal level [dB]")
         self.ax.set_ylabel("Channel number")
         self.ax.set_xlabel("Time [s]")
@@ -95,29 +100,42 @@ def update(self, ed):
             col[ch, 0] = ed[ch]
         self.Z = np.hstack((self.Z[:, 1:], col))
         if resize:
-            self.ax.set_ylim([self.ch_min - .5, self.ch_max + 0.5])
+            self.ax.set_ylim([self.ch_min - 0.5, self.ch_max + 0.5])
             self.ax.set_yticks(range(self.ch_min, self.ch_max + 1))
         self.pcm.set_array(self.Z.ravel())
-        return self.pcm,
+        return (self.pcm,)
 
 
 def main(argv):
-    loglevels = [logging.CRITICAL, logging.ERROR, logging.WARN, logging.INFO, logging.DEBUG]
+    loglevels = [
+        logging.CRITICAL,
+        logging.ERROR,
+        logging.WARN,
+        logging.INFO,
+        logging.DEBUG,
+    ]
     parser = argparse.ArgumentParser(argv)
-    parser.add_argument('-v', '--verbosity', type=int, default=4,
-                        help='set logging verbosity, 1=CRITICAL, 5=DEBUG')
-    parser.add_argument('tty',
-                        help='Serial port device file name')
-    parser.add_argument('-b', '--baudrate', default=115200, type=int,
-                        help='Serial port baudrate')
+    parser.add_argument(
+        "-v",
+        "--verbosity",
+        type=int,
+        default=4,
+        help="set logging verbosity, 1=CRITICAL, 5=DEBUG",
+    )
+    parser.add_argument("tty", help="Serial port device file name")
+    parser.add_argument(
+        "-b", "--baudrate", default=115200, type=int, help="Serial port baudrate"
+    )
     args = parser.parse_args()
     # logging setup
-    logging.basicConfig(level=loglevels[args.verbosity-1])
+    logging.basicConfig(level=loglevels[args.verbosity - 1])
 
     # open serial port
     try:
         logging.debug("Open serial port %s, baud=%d", args.tty, args.baudrate)
-        port = serial.Serial(port=args.tty, baudrate=9600, dsrdtr=0, rtscts=0, timeout=0.3)
+        port = serial.Serial(
+            port=args.tty, baudrate=9600, dsrdtr=0, rtscts=0, timeout=0.3
+        )
         # This baudrate reconfiguration is necessary for certain USB to serial
         # adapters, the Linux cdc_acm driver will keep repeating stale buffer
         # contents otherwise. No idea about the cause, but this fixes the symptom.
@@ -131,7 +149,9 @@ def main(argv):
         fig, ax = plt.subplots()
         graph = RSSIPlot(ax)
         emitter = SpectrumEmitter(port)
-        animation.FuncAnimation(fig, graph.update, emitter.data_gen, interval=10, blit=True)
+        animation.FuncAnimation(
+            fig, graph.update, emitter.data_gen, interval=10, blit=True
+        )
         plt.show()
     except KeyboardInterrupt:
         port.close()