diff --git a/otbox.py b/otbox.py
index af63a9b..8f5a6b7 100644
--- a/otbox.py
+++ b/otbox.py
@@ -19,7 +19,7 @@
 import argparse
 import logging
 
-try: 
+try:
     from PIL import Image
     from PIL import ImageFont
     from PIL import ImageDraw
@@ -87,7 +87,7 @@ def __init__(self, otbox):
         self.firmware_temp = os.path.join(os.path.dirname(__file__), 'bootloaders', 'opentestbed', 'firmware_mote_{0}.ihex')
 
     def bootload_mote(self, serialport, firmware_file):
-    
+
         bootloader_backdoor_enabled   = False
         extended_linear_address_found = False
         
@@ -112,10 +112,12 @@ def bootload_mote(self, serialport, firmware_file):
                     break
         
         assert bootloader_backdoor_enabled
-        
+
         return subprocess.Popen(
-                ['python', 'bootloaders/cc2538-bsl.py', '-e', '--bootloader-invert-lines', '-w', '-b', '400000',
-                 '-p', serialport, firmware_file], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+                ['python3', 'bootloaders/cc2538-bsl.py',
+                '--bootloader-invert-lines', '--erase-write',
+                '-v', '-b', '400000', '-p',
+                serialport, firmware_file], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
 
     def _display_image(self):
         import pygame
@@ -317,7 +319,7 @@ def _on_mqtt_connect(self, client, userdata, flags, rc):
         self.mqttconnected   = True
 
         # subscribe to box commands (device-specific and 'all')
-        # note that unknown commands will be ignored by _execute_command_safely 
+        # note that unknown commands will be ignored by _execute_command_safely
         client.subscribe('{0}/#'.format(self.mqtttopic_box_cmd_prefix))
         client.subscribe('{0}/deviceType/box/deviceId/all/cmd/#'.format(self.testbed))
 
@@ -572,11 +574,11 @@ def _mqtt_handler_program(self, deviceType, deviceId, payload):
 
         payload    = json.loads(payload) # shorthand
         mote       = self._eui64_to_moteinfoelem(deviceId)
-        
+
         # disconnect from the serialports
         self.SerialportHandlers[mote['serialport']].disconnectSerialPort()
         time.sleep(2) # wait 2 seconds to release the serial ports
-        
+
         if 'url' in payload and payload['url'].startswith("ftp://"):
             # use urllib to get firmware from ftp server (requests doesn't support for ftp)
             urllib.urlretrieve(payload['url'],self.tb.firmware_temp.format(deviceId))
@@ -679,14 +681,14 @@ def _bootload_motes(self, serialports, firmware_file):
         '''
         bootloads firmware_file onto multiple motes in parallel
         '''
-        
+
         # start bootloading each mote
         ongoing_bootloads    = {}
         for serialport in serialports:
-        
+
             # simply the name
             port = serialport.split('/')[-1]
-        
+
             # stop serial reader
             ongoing_bootloads[port] = self.tb.bootload_mote(serialport, firmware_file)
 
@@ -694,7 +696,7 @@ def _bootload_motes(self, serialports, firmware_file):
         for ongoing_bootload in ongoing_bootloads:
             # wait for this bootload process to finish
             (stdout, stderr) = ongoing_bootloads[ongoing_bootload].communicate()
-            
+
             # record the last output of bootload process
             with open("log_{0}.txt".format(ongoing_bootload),'w') as f:
                 f.write("stdout: {0} stderr {1}".format(stdout,stderr))