diff --git a/flash.py b/flash.py
index 461ef1c..af5494c 100755
--- a/flash.py
+++ b/flash.py
@@ -6,7 +6,7 @@
 
 
 def help() -> None:
-    print(f'{sys.argv[0]} [nano | xavier | orin] [nand | v05]')
+    print(f'{sys.argv[0]} [nano | xavier | orin] [nand | v05] [usb | /dev/<name>] [enable]')
     print(f'   nano          flashing Jetson Nano (default)')
     print(f'   xavier        flashing Jetson Xavier')
     print(f'   orin          flashing Jetson Orin')
@@ -14,6 +14,7 @@ def help() -> None:
     print(f'   v05           Robot Brain has piggyboard with V0.5 or higher (eg. newer version)')
     print(f'   usb           use /dev/tty.SLAB_USBtoUART as serial device')
     print(f'   /dev/<name>   use /dev/<name> as serial device')
+    print(f'   enable        enable the ESP32 microcontroller')
 
 
 if any(h in sys.argv for h in ['--help', '-help', 'help']):
@@ -28,6 +29,12 @@ def help() -> None:
         device = p
 esp = Esp(nand='nand' in sys.argv, xavier='xavier' in sys.argv, orin='orin' in sys.argv, v05='v05' in sys.argv, device=device)
 
+if 'enable' in sys.argv:
+    with esp.pin_config():
+        print('Enabling ESP...')
+        esp.activate()
+    sys.exit()
+
 with esp.pin_config(), esp.flash_mode():
     print('Flashing...')
     result = subprocess.run([