diff --git a/README.md b/README.md
index 0c88ad6..6c8256d 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@ Tested on Ubuntu 19.10, and with Raspberry Pi 3B+ and 4B Raspbian GNU/Linux 10 (
 Emulation of JOYCON_R, JOYCON_L and PRO_CONTROLLER. Able to send:
 - button commands
 - stick state
-- nfc data
+- ~~nfc data~~ (removed, see [#80](https://github.com/mart1nro/joycontrol/issues/80))
 
 ## Installation
 - Install dependencies
@@ -24,7 +24,7 @@ Arch Linux Derivatives: Install the `hidapi` and `bluez-utils-compat`(AUR) packa
 ```bash
 sudo pip3 install .
 ```
-- Disable the bluez "input" plugin, see [#8](https://github.com/mart1nro/joycontrol/issues/8)
+- Consider to disable the bluez "input" plugin, see [#8](https://github.com/mart1nro/joycontrol/issues/8)
 
 ## Command line interface example
 - Run the script
@@ -57,6 +57,9 @@ Call "help" to see a list of available commands.
   opening of the "Change Grip/Order" menu is not required.
 - ...
 
+## Thanks
+- Special thanks to https://github.com/dekuNukem/Nintendo_Switch_Reverse_Engineering for reverse engineering of the joycon protocol
+- Thanks to the growing number of contributers and users
 
 ## Resources
 
diff --git a/joycontrol/controller_state.py b/joycontrol/controller_state.py
index 8dadd55..000d5f8 100644
--- a/joycontrol/controller_state.py
+++ b/joycontrol/controller_state.py
@@ -118,7 +118,7 @@ class ButtonState:
             self._available_buttons = {'y', 'x', 'b', 'a', 'sr', 'sl', 'r', 'zr',
                                        'plus', 'r_stick', 'home'}
         elif self.controller == Controller.JOYCON_L:
-            self._available_buttons = {'plus', 'l_stick', 'capture',
+            self._available_buttons = {'minus', 'l_stick', 'capture',
                                        'down', 'up', 'right', 'left', 'sr', 'sl', 'l', 'zl'}
 
         # byte 1
@@ -171,13 +171,13 @@ class ButtonState:
 
     def get_available_buttons(self):
         """
-        :returns set of valid buttons
+        :returns: set of valid buttons
         """
         return set(self._available_buttons)
 
     def __iter__(self):
         """
-        :returns iterator over the button bytes
+        :returns: iterator over the button bytes
         """
         yield self._byte_1
         yield self._byte_2
@@ -187,7 +187,12 @@ class ButtonState:
         self._byte_1 = self._byte_2 = self._byte_3 = 0
 
 
-async def button_push(controller_state, *buttons, sec=0.1):
+async def button_press(controller_state, *buttons):
+    """
+    Set given buttons in the controller state to the pressed down state and wait till send.
+    :param controller_state:
+    :param buttons: Buttons to press down (see ButtonState.get_available_buttons)
+    """
     if not buttons:
         raise ValueError('No Buttons were given.')
 
@@ -195,20 +200,43 @@ async def button_push(controller_state, *buttons, sec=0.1):
 
     for button in buttons:
         # push button
-        button_state.set_button(button)
+        button_state.set_button(button, pushed=True)
 
-    # send report
+    # wait until report is send
     await controller_state.send()
-    await asyncio.sleep(sec)
+
+
+async def button_release(controller_state, *buttons):
+    """
+    Set given buttons in the controller state to the unpressed state and wait till send.
+    :param controller_state:
+    :param buttons: Buttons to set to unpressed (see ButtonState.get_available_buttons)
+    """
+    if not buttons:
+        raise ValueError('No Buttons were given.')
+
+    button_state = controller_state.button_state
 
     for button in buttons:
         # release button
         button_state.set_button(button, pushed=False)
 
-    # send report
+    # wait until report is send
     await controller_state.send()
 
 
+async def button_push(controller_state, *buttons, sec=0.1):
+    """
+    Shortly push the given buttons. Wait until the controller state is send.
+    :param controller_state:
+    :param buttons: Buttons to push (see ButtonState.get_available_buttons)
+    :param sec: Seconds to wait before releasing the button, default: 0.1
+    """
+    await button_press(controller_state, *buttons)
+    await asyncio.sleep(sec)
+    await button_release(controller_state, *buttons)
+
+
 class _StickCalibration:
     def __init__(self, h_center, v_center, h_max_above_center, v_max_above_center, h_max_below_center, v_max_below_center):
         self.h_center = h_center
diff --git a/joycontrol/hid.py b/joycontrol/hid.py
new file mode 100644
index 0000000..446f215
--- /dev/null
+++ b/joycontrol/hid.py
@@ -0,0 +1,36 @@
+import asyncio
+
+import hid
+
+VENDOR_ID = 1406
+PRODUCT_ID_JL = 8198
+PRODUCT_ID_JR = 8199
+PRODUCT_ID_PC = 8201
+
+
+async def get_blt_hid_device():
+    while True:
+        for device in hid.enumerate(0, 0):
+            # looking for devices matching Nintendo's vendor id and JoyCon product id
+            if device['vendor_id'] == VENDOR_ID and device['product_id'] in (
+            PRODUCT_ID_JL, PRODUCT_ID_JR, PRODUCT_ID_PC):
+                return device
+
+        await asyncio.sleep(2)
+
+
+class AsyncHID(hid.Device):
+    def __init__(self, *args, loop=asyncio.get_event_loop(), **kwargs):
+        super().__init__(*args, **kwargs)
+        self._loop = loop
+
+        self._write_lock = asyncio.Lock()
+        self._read_lock = asyncio.Lock()
+
+    async def read(self, size, timeout=None):
+        async with self._read_lock:
+            return await self._loop.run_in_executor(None, hid.Device.read, self, size, timeout)
+
+    async def write(self, data):
+        async with self._write_lock:
+            return await self._loop.run_in_executor(None, hid.Device.write, self, data)
\ No newline at end of file
diff --git a/joycontrol/ir_nfc_mcu.py b/joycontrol/ir_nfc_mcu.py
deleted file mode 100644
index 50b387b..0000000
--- a/joycontrol/ir_nfc_mcu.py
+++ /dev/null
@@ -1,155 +0,0 @@
-import logging
-from enum import Enum
-from crc8 import crc8
-
-logger = logging.getLogger(__name__)
-
-
-class Action(Enum):
-    NON = 0
-    REQUEST_STATUS = 1
-    START_TAG_POLLING = 2
-    START_TAG_DISCOVERY = 3
-    READ_TAG = 4
-    READ_TAG_2 = 5
-    READ_FINISHED = 6
-
-
-class McuState(Enum):
-    NOT_INITIALIZED = 0
-    IRC = 1
-    NFC = 2
-    STAND_BY = 3
-    BUSY = 4
-
-
-def copyarray(dest, offset, src):
-    for i in range(len(src)):
-        dest[offset + i] = src[i]
-
-
-class IrNfcMcu:
-    """
-    TODO: cleanup
-    """
-
-    def __init__(self):
-        self._fw_major = [0, 3]
-        self._fw_minor = [0, 5]
-
-        self._bytes = [0] * 313
-
-        self._action = Action.NON
-        self._state = McuState.NOT_INITIALIZED
-
-        self._nfc_content = None
-
-    def get_fw_major(self):
-        return self._fw_major
-
-    def get_fw_minor(self):
-        return self._fw_minor
-
-    def set_action(self, v):
-        self._action = v
-
-    def get_action(self):
-        return self._action
-
-    def set_state(self, v):
-        self._state = v
-
-    def get_state(self):
-        return self._state
-
-    def _get_state_byte(self):
-        if self.get_state() == McuState.NFC:
-            return 4
-        elif self.get_state() == McuState.BUSY:
-            return 6
-        elif self.get_state() == McuState.NOT_INITIALIZED:
-            return 1
-        elif self.get_state() == McuState.STAND_BY:
-            return 1
-        else:
-            return 0
-
-    def update_status(self):
-        self._bytes[0] = 1
-        self._bytes[1] = 0
-        self._bytes[2] = 0
-        self._bytes[3] = self._fw_major[0]
-        self._bytes[4] = self._fw_major[1]
-        self._bytes[5] = self._fw_minor[0]
-        self._bytes[6] = self._fw_minor[1]
-        self._bytes[7] = self._get_state_byte()
-
-    def update_nfc_report(self):
-        self._bytes = [0] * 313
-        if self.get_action() == Action.REQUEST_STATUS:
-            self.update_status()
-        elif self.get_action() == Action.NON:
-            self._bytes[0] = 0xff
-        elif self.get_action() == Action.START_TAG_DISCOVERY:
-            self._bytes[0] = 0x2a
-            self._bytes[1] = 0
-            self._bytes[2] = 5
-            self._bytes[3] = 0
-            self._bytes[4] = 0
-            self._bytes[5] = 9
-            self._bytes[6] = 0x31
-            self._bytes[7] = 0
-        elif self.get_action() == Action.START_TAG_POLLING:
-            self._bytes[0] = 0x2a
-            self._bytes[1] = 0
-            self._bytes[2] = 5
-            self._bytes[3] = 0
-            self._bytes[4] = 0
-            if self._nfc_content is not None:
-                data = [0x09, 0x31, 0x09, 0x00, 0x00, 0x00, 0x01, 0x01, 0x02, 0x00, 0x07]
-                copyarray(self._bytes, 5, data)
-                copyarray(self._bytes, 5 + len(data), self._nfc_content[0:3])
-                copyarray(self._bytes, 5 + len(data) + 3, self._nfc_content[4:8])
-            else:
-                logger.info('nfc content is none')
-                self._bytes[5] = 9
-                self._bytes[6] = 0x31
-                self._bytes[7] = 0
-        elif self.get_action() in (Action.READ_TAG, Action.READ_TAG_2):
-            self._bytes[0] = 0x3a
-            self._bytes[1] = 0
-            self._bytes[2] = 7
-            if self.get_action() == Action.READ_TAG:
-                data1 = bytes.fromhex('010001310200000001020007')
-                copyarray(self._bytes, 3, data1)
-                copyarray(self._bytes, 3 + len(data1), self._nfc_content[0:3])
-                copyarray(self._bytes, 3 + len(data1) + 3, self._nfc_content[4:8])
-                data2 = bytes.fromhex('000000007DFDF0793651ABD7466E39C191BABEB856CEEDF1CE44CC75EAFB27094D087AE803003B3C7778860000')
-                copyarray(self._bytes, 3 + len(data1) + 3 + 4, data2)
-                copyarray(self._bytes, 3 + len(data1) + 3 + 4 + len(data2), self._nfc_content[0:245])
-                self.set_action(Action.READ_TAG_2)
-            else:
-                data = bytes.fromhex('02000927')
-                copyarray(self._bytes, 3, data)
-                copyarray(self._bytes, 3 + len(data), self._nfc_content[245:540])
-                self.set_action(Action.READ_FINISHED)
-        elif self.get_action() == Action.READ_FINISHED:
-            self._bytes[0] = 0x2a
-            self._bytes[1] = 0
-            self._bytes[2] = 5
-            self._bytes[3] = 0
-            self._bytes[4] = 0
-            data = bytes.fromhex('0931040000000101020007')
-            copyarray(self._bytes, 5, data)
-            copyarray(self._bytes, 5 + len(data), self._nfc_content[0:3])
-            copyarray(self._bytes, 5 + len(data) + 3, self._nfc_content[4:8])
-
-        crc = crc8()
-        crc.update(bytes(self._bytes[:-1]))
-        self._bytes[-1] = ord(crc.digest())
-
-    def set_nfc(self, nfc_content):
-        self._nfc_content = nfc_content
-
-    def __bytes__(self):
-        return bytes(self._bytes)
diff --git a/joycontrol/protocol.py b/joycontrol/protocol.py
index 7134f0d..f83a9d9 100644
--- a/joycontrol/protocol.py
+++ b/joycontrol/protocol.py
@@ -11,8 +11,6 @@ from joycontrol.controller_state import ControllerState
 from joycontrol.memory import FlashMemory
 from joycontrol.report import OutputReport, SubCommand, InputReport, OutputReportID
 from joycontrol.transport import NotConnectedError
-from joycontrol.ir_nfc_mcu import IrNfcMcu, McuState, Action
-from crc8 import crc8
 
 logger = logging.getLogger(__name__)
 
@@ -42,8 +40,6 @@ class ControllerProtocol(BaseProtocol):
         self._controller_state = ControllerState(self, controller, spi_flash=spi_flash)
         self._controller_state_sender = None
 
-        self._mcu = IrNfcMcu()
-
         # None = Just answer to sub commands
         self._input_report_mode = None
 
@@ -166,9 +162,8 @@ class ControllerProtocol(BaseProtocol):
                         elif output_report_id == OutputReportID.SUB_COMMAND:
                             reply_send = await self._reply_to_sub_command(report)
                         elif output_report_id == OutputReportID.REQUEST_IR_NFC_MCU:
-                            # TODO: This does not reply anything
-                            # reply_send = await self._reply_to_ir_nfc_mcu(report)
-                            await self._reply_to_ir_nfc_mcu(report)
+                            # TODO NFC
+                            raise NotImplementedError('NFC communictation is not implemented.')                            
                         else:
                             logger.warning(f'Report unknown output report "{output_report_id}" - IGNORE')
                     except ValueError as v_err:
@@ -184,11 +179,9 @@ class ControllerProtocol(BaseProtocol):
                     # TODO: set some sensor data
                     input_report.set_6axis_data()
 
-                    # set nfc data
+                    # TODO NFC - set nfc data
                     if input_report.get_input_report_id() == 0x31:
-                        self._mcu.set_nfc(self._controller_state.get_nfc())
-                        self._mcu.update_nfc_report()
-                        input_report.set_ir_nfc_data(bytes(self._mcu))
+                        pass
 
                     await self.write(input_report)
 
@@ -237,50 +230,6 @@ class ControllerProtocol(BaseProtocol):
         else:
             logger.warning(f'Output report {output_report_id} not implemented - ignoring')
 
-    async def _reply_to_ir_nfc_mcu(self, report):
-        """
-        TODO: Cleanup
-              We aren't replying to anything here, do we need to?
-        """
-        sub_command = report.data[11]
-        sub_command_data = report.data[12:]
-
-        # logging.info(f'received output report - Request MCU sub command {sub_command}')
-
-        if self._mcu.get_action() in (Action.READ_TAG, Action.READ_TAG_2, Action.READ_FINISHED):
-            return
-
-        # Request mcu state
-        if sub_command == 0x01:
-            # input_report = InputReport()
-            # input_report.set_input_report_id(0x21)
-            # input_report.set_misc()
-
-            # input_report.set_ack(0xA0)
-            # input_report.reply_to_subcommand_id(0x21)
-
-            self._mcu.set_action(Action.REQUEST_STATUS)
-            # input_report.set_mcu(self._mcu)
-
-            # await self.write(input_report)
-        # Send Start tag discovery
-        elif sub_command == 0x02:
-            # 0: Cancel all, 4: StartWaitingReceive
-            if sub_command_data[0] == 0x04:
-                self._mcu.set_action(Action.START_TAG_DISCOVERY)
-            # 1: Start polling
-            elif sub_command_data[0] == 0x01:
-                self._mcu.set_action(Action.START_TAG_POLLING)
-            # 2: stop polling
-            elif sub_command_data[0] == 0x02:
-                self._mcu.set_action(Action.NON)
-            elif sub_command_data[0] == 0x06:
-                self._mcu.set_action(Action.READ_TAG)
-            else:
-                logging.info(f'Unknown sub_command_data arg {sub_command_data}')
-        else:
-            logging.info(f'Unknown MCU sub command {sub_command}')
-
     async def _reply_to_sub_command(self, report):
         # classify sub command
         try:
@@ -467,6 +416,7 @@ class ControllerProtocol(BaseProtocol):
         await self.write(input_report)
 
     async def _command_set_nfc_ir_mcu_config(self, sub_command_data):
+        # TODO NFC
         input_report = InputReport()
         input_report.set_input_report_id(0x21)
         input_report.set_misc()
@@ -474,30 +424,14 @@ class ControllerProtocol(BaseProtocol):
         input_report.set_ack(0xA0)
         input_report.reply_to_subcommand_id(SubCommand.SET_NFC_IR_MCU_CONFIG.value)
 
-        self._mcu.update_status()
-        data = list(bytes(self._mcu)[0:34])
-        crc = crc8()
-        crc.update(bytes(data[:-1]))
-        checksum = crc.digest()
-        data[-1] = ord(checksum)
-    
+        data = [1, 0, 255, 0, 8, 0, 27, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 200]
         for i in range(len(data)):
-            input_report.data[16+i] = data[i]
-        
-        # Set MCU mode cmd
-        if sub_command_data[1] == 0:
-            if sub_command_data[2] == 0:
-                self._mcu.set_state(McuState.STAND_BY)
-            elif sub_command_data[2] == 4:
-                self._mcu.set_state(McuState.NFC)
-            else:
-                logger.info(f"unknown mcu state {sub_command_data[2]}")
-        else:
-            logger.info(f"unknown mcu config command {sub_command_data}")
+            input_report.data[16 + i] = data[i]
 
         await self.write(input_report)
 
     async def _command_set_nfc_ir_mcu_state(self, sub_command_data):
+        # TODO NFC
         input_report = InputReport()
         input_report.set_input_report_id(0x21)
         input_report.set_misc()
@@ -506,13 +440,10 @@ class ControllerProtocol(BaseProtocol):
             # 0x01 = Resume
             input_report.set_ack(0x80)
             input_report.reply_to_subcommand_id(SubCommand.SET_NFC_IR_MCU_STATE.value)
-            self._mcu.set_action(Action.NON)
-            self._mcu.set_state(McuState.STAND_BY)
         elif sub_command_data[0] == 0x00:
             # 0x00 = Suspend
             input_report.set_ack(0x80)
             input_report.reply_to_subcommand_id(SubCommand.SET_NFC_IR_MCU_STATE.value)
-            self._mcu.set_state(McuState.STAND_BY)
         else:
             raise NotImplementedError(f'Argument {sub_command_data[0]} of {SubCommand.SET_NFC_IR_MCU_STATE} '
                                       f'not implemented.')
diff --git a/joycontrol/report.py b/joycontrol/report.py
index 849ac68..7b0e8e6 100644
--- a/joycontrol/report.py
+++ b/joycontrol/report.py
@@ -272,16 +272,29 @@ class OutputReport:
 
     @staticmethod
     def _encode_rumble_data(freq, amp):
-        if not 0 <= freq <= 1252:
-            raise ValueError('Frequency must be in [0, 1252].')
+        # TODO: Fix LA Byte 2
+
+        if not (40 <= freq <= 1253):
+            raise ValueError('Frequency must be in [40, 1253].')
+
+        if amp > 1.003:
+            raise ValueError('Amplitudes higher than 1.003 are not safe '
+                             'for the integrity of the linear resonant actuators')
 
         # Float frequency to hex conversion
         encoded_hex_freq = int(round(math.log2(freq / 10) * 32))
 
         # Convert to Joy-Con HF range. Range in big-endian: 0x0004-0x01FC with +0x0004 steps.
-        hf = (encoded_hex_freq - 0x60) * 4
+        if freq <= 80:
+            hf = 0x00
+        else:
+            hf = (encoded_hex_freq - 0x60) * 4
+
         # Convert to Joy-Con LF range. Range: 0x01-0x7F.
-        lf = encoded_hex_freq - 0x40
+        if freq >= 640:
+            lf = 0x00
+        else:
+            lf = encoded_hex_freq - 0x40
 
         # Float amplitude to hex conversion
         encoded_hex_amp = 0
diff --git a/joycontrol/server.py b/joycontrol/server.py
index 7d7a212..eb3e19a 100644
--- a/joycontrol/server.py
+++ b/joycontrol/server.py
@@ -76,10 +76,9 @@ async def create_hid_server(protocol_factory, ctl_psm=17, itr_psm=19, device_id=
 
         hid.powered(True)
         hid.pairable(True)
-
-        # setting bluetooth adapter name and class to the device we wish to emulate
+        
+        # setting bluetooth adapter name to the device we wish to emulate
         await hid.set_name(protocol.controller.device_name())
-        await hid.set_class()
 
         logger.info('Advertising the Bluetooth SDP record...')
         try:
@@ -88,6 +87,9 @@ async def create_hid_server(protocol_factory, ctl_psm=17, itr_psm=19, device_id=
             # Already registered (If multiple controllers are being emulated and this method is called consecutive times)
             logger.debug(dbus_err)
 
+        # set the device class to "Gamepad/joystick"
+        await hid.set_class()
+
         # start advertising
         hid.discoverable()
 
diff --git a/joycontrol/utils.py b/joycontrol/utils.py
index 4eadc31..496cb02 100644
--- a/joycontrol/utils.py
+++ b/joycontrol/utils.py
@@ -2,28 +2,9 @@ import asyncio
 import logging
 from contextlib import contextmanager
 
-import hid
-
 logger = logging.getLogger(__name__)
 
 
-class AsyncHID(hid.Device):
-    def __init__(self, *args, loop=asyncio.get_event_loop(), **kwargs):
-        super().__init__(*args, **kwargs)
-        self._loop = loop
-
-        self._write_lock = asyncio.Lock()
-        self._read_lock = asyncio.Lock()
-
-    async def read(self, size, timeout=None):
-        async with self._read_lock:
-            return await self._loop.run_in_executor(None, hid.Device.read, self, size, timeout)
-
-    async def write(self, data):
-        async with self._write_lock:
-            return await self._loop.run_in_executor(None, hid.Device.write, self, data)
-
-
 @contextmanager
 def get_output(path=None, open_flags='wb', default=None):
     """
diff --git a/run_controller_cli.py b/run_controller_cli.py
old mode 100644
new mode 100755
index c90e506..c84597b
--- a/run_controller_cli.py
+++ b/run_controller_cli.py
@@ -10,7 +10,7 @@ from aioconsole import ainput
 from joycontrol import logging_default as log, utils
 from joycontrol.command_line_interface import ControllerCLI
 from joycontrol.controller import Controller
-from joycontrol.controller_state import ControllerState, button_push
+from joycontrol.controller_state import ControllerState, button_push, button_press, button_release
 from joycontrol.memory import FlashMemory
 from joycontrol.protocol import controller_protocol_factory
 from joycontrol.server import create_hid_server
@@ -136,25 +136,21 @@ async def test_controller_buttons(controller_state: ControllerState):
     await button_push(controller_state, 'home')
 
 
-async def set_nfc(controller_state, file_path):
+def ensure_valid_button(controller_state, *buttons):
     """
-    Sets nfc content of the controller state to contents of the given file.
-    :param controller_state: Emulated controller state
-    :param file_path: Path to nfc dump file
+    Raise ValueError if any of the given buttons os not part of the controller state.
+    :param controller_state:
+    :param buttons: Any number of buttons to check (see ButtonState.get_available_buttons)
     """
-    loop = asyncio.get_event_loop()
-
-    with open(file_path, 'rb') as nfc_file:
-        content = await loop.run_in_executor(None, nfc_file.read)
-        controller_state.set_nfc(content)
+    for button in buttons:
+        if button not in controller_state.button_state.get_available_buttons():
+            raise ValueError(f'Button {button} does not exist on {controller_state.get_controller()}')
 
 
 async def mash_button(controller_state, button, interval):
-    # waits until controller is fully connected
+    # wait until controller is fully connected
     await controller_state.connect()
-
-    if button not in controller_state.button_state.get_available_buttons():
-        raise ValueError(f'Button {button} does not exist on {controller_state.get_controller()}')
+    ensure_valid_button(controller_state, button)
 
     user_input = asyncio.ensure_future(
         ainput(prompt=f'Pressing the {button} button every {interval} seconds... Press <enter> to stop.')
@@ -168,6 +164,107 @@ async def mash_button(controller_state, button, interval):
     await user_input
 
 
+def _register_commands_with_controller_state(controller_state, cli):
+    """
+    Commands registered here can use the given controller state.
+    The doc string of commands will be printed by the CLI when calling "help"
+    :param cli:
+    :param controller_state:
+    """
+    async def test_buttons():
+        """
+        test_buttons - Navigates to the "Test Controller Buttons" menu and presses all buttons.
+        """
+        await test_controller_buttons(controller_state)
+
+    cli.add_command(test_buttons.__name__, test_buttons)
+
+    # Mash a button command
+    async def mash(*args):
+        """
+        mash - Mash a specified button at a set interval
+
+        Usage:
+            mash <button> <interval>
+        """
+        if not len(args) == 2:
+            raise ValueError('"mash_button" command requires a button and interval as arguments!')
+
+        button, interval = args
+        await mash_button(controller_state, button, interval)
+
+    cli.add_command(mash.__name__, mash)
+
+    # Hold a button command
+    async def hold(*args):
+        """
+        hold - Press and hold specified buttons
+
+        Usage:
+            hold <button>
+
+        Example:
+            hold a b
+        """
+        if not args:
+            raise ValueError('"hold" command requires a button!')
+
+        ensure_valid_button(controller_state, *args)
+
+        # wait until controller is fully connected
+        await controller_state.connect()
+        await button_press(controller_state, *args)
+
+    cli.add_command(hold.__name__, hold)
+
+    # Release a button command
+    async def release(*args):
+        """
+        release - Release specified buttons
+
+        Usage:
+            release <button>
+
+        Example:
+            release a b
+        """
+        if not args:
+            raise ValueError('"release" command requires a button!')
+
+        ensure_valid_button(controller_state, *args)
+
+        # wait until controller is fully connected
+        await controller_state.connect()
+        await button_release(controller_state, *args)
+
+    cli.add_command(release.__name__, release)
+
+    # Create nfc command
+    async def nfc(*args):
+        """
+        nfc - Sets nfc content
+
+        Usage:
+            nfc <file_name>          Set controller state NFC content to file
+            nfc remove               Remove NFC content from controller state
+        """
+        logger.error('NFC Support was removed from joycontrol - see https://github.com/mart1nro/joycontrol/issues/80')
+        if controller_state.get_controller() == Controller.JOYCON_L:
+            raise ValueError('NFC content cannot be set for JOYCON_L')
+        elif not args:
+            raise ValueError('"nfc" command requires file path to an nfc dump as argument!')
+        elif args[0] == 'remove':
+            controller_state.set_nfc(None)
+            print('Removed nfc content.')
+        else:
+            _loop = asyncio.get_event_loop()
+            with open(args[0], 'rb') as nfc_file:
+                content = await _loop.run_in_executor(None, nfc_file.read)
+                controller_state.set_nfc(content)
+
+    cli.add_command(nfc.__name__, nfc)
+
+
 async def _main(args):
     # parse the spi flash
     if args.spi_flash:
@@ -181,6 +278,7 @@ async def _main(args):
     controller = Controller.from_arg(args.controller)
 
     with utils.get_output(path=args.log, default=None) as capture_file:
+        # prepare the the emulated controller
         factory = controller_protocol_factory(controller, spi_flash=spi_flash)
         ctl_psm, itr_psm = 17, 19
         transport, protocol = await create_hid_server(factory, reconnect_bt_addr=args.reconnect_bt_addr,
@@ -192,61 +290,14 @@ async def _main(args):
 
         # Create command line interface and add some extra commands
         cli = ControllerCLI(controller_state)
+        _register_commands_with_controller_state(controller_state, cli)
+        cli.add_command('amiibo', ControllerCLI.deprecated('Command was removed - use "nfc" instead!'))
 
-        # Wrap the script so we can pass the controller state. The doc string will be printed when calling 'help'
-        async def _run_test_controller_buttons():
-            """
-            test_buttons - Navigates to the "Test Controller Buttons" menu and presses all buttons.
-            """
-            await test_controller_buttons(controller_state)
-
-        # add the script from above
-        cli.add_command('test_buttons', _run_test_controller_buttons)
-
-        # Mash a button command
-        async def call_mash_button(*args):
-            """
-            mash - Mash a specified button at a set interval
-
-            Usage:
-                mash <button> <interval>
-            """
-            if not len(args) == 2:
-                raise ValueError('"mash_button" command requires a button and interval as arguments!')
-
-            button, interval = args
-            await mash_button(controller_state, button, interval)
-
-        # add the script from above
-        cli.add_command('mash', call_mash_button)
-
-        # Create nfc command
-        async def nfc(*args):
-            """
-            nfc - Sets nfc content
-
-            Usage:
-                nfc <file_name>          Set controller state NFC content to file
-                nfc remove               Remove NFC content from controller state
-            """
-            if controller_state.get_controller() == Controller.JOYCON_L:
-                raise ValueError('NFC content cannot be set for JOYCON_L')
-            elif not args:
-                raise ValueError('"nfc" command requires file path to an nfc dump as argument!')
-            elif args[0] == 'remove':
-                controller_state.set_nfc(None)
-                print('Removed nfc content.')
-            else:
-                await set_nfc(controller_state, args[0])
-
-        # add the script from above
-        cli.add_command('nfc', nfc)
-        cli.add_command('amiibo', ControllerCLI.deprecated('Command is deprecated - use "nfc" instead!'))
-
-
+        # set default nfc content supplied by argument
         if args.nfc is not None:
-            await nfc(args.nfc)
+            await cli.commands['nfc'](args.nfc)
 
+        # run the cli
         try:
             await cli.run()
         finally:
diff --git a/scripts/__init__.py b/scripts/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/scripts/joycon_rumble.py b/scripts/joycon_rumble.py
index b4e589f..72ad027 100644
--- a/scripts/joycon_rumble.py
+++ b/scripts/joycon_rumble.py
@@ -2,24 +2,17 @@ import asyncio
 import logging
 import os
 
-import hid
-
 from joycontrol import logging_default as log
+from joycontrol.hid import get_blt_hid_device, AsyncHID
 from joycontrol.report import InputReport, OutputReport, OutputReportID, SubCommand
-from joycontrol.utils import AsyncHID
 
 logger = logging.getLogger(__name__)
 
-VENDOR_ID = 1406
-PRODUCT_ID_JL = 8198
-PRODUCT_ID_JR = 8199
-PRODUCT_ID_PC = 8201
-
-
 """
 Sends some vibration reports to a joycon. Only works with the right joycon atm. 
 """
 
+
 async def print_outputs(hid_device):
     while True:
         data = await hid_device.read(255)
@@ -52,21 +45,23 @@ async def send_vibration_report(hid_device):
     await hid_device.write(bytes(data))
     await asyncio.sleep(0.1)
 
+    scale = [261.63, 293.66, 329.63, 349.23, 392.00, 440.00, 493.88, 523.25]
+    scale = [int(round(n)) for n in scale]
+
+    amp = 1
     time = 2
     while True:
-        for i in range(10):
-            rumble_report = OutputReport()
-            report.set_timer(time)
-            time += 1
-            rumble_report.set_output_report_id(OutputReportID.RUMBLE_ONLY)
-            # increase frequency
-            rumble_report.set_right_rumble_data(100 + i * 100, 1)
-            data = bytes(rumble_report)[1:]
-            print('writing', data)
-            await hid_device.write(bytes(data))
+        rumble_report = OutputReport()
+        report.set_timer(time)
+        time += 1
+        rumble_report.set_output_report_id(OutputReportID.RUMBLE_ONLY)
+        # increase frequency
+        rumble_report.set_right_rumble_data(scale[time % len(scale)], amp)
+        data = bytes(rumble_report)[1:]
+        print('writing', data)
+        await hid_device.write(bytes(data))
 
-            await asyncio.sleep(.5)
-        break
+        await asyncio.sleep(.2)
 
     try:
         await reader
@@ -75,19 +70,11 @@ async def send_vibration_report(hid_device):
 
 
 async def _main(loop):
-    logger.info('Waiting for HID devices... Please connect one JoyCon (left OR right), or a Pro Controller over Bluetooth. '
+    logger.info('Waiting for HID devices... Please connect one JoyCon (left OR right), '
+                'or a Pro Controller over Bluetooth. '
                 'Note: The bluez "input" plugin needs to be enabled (default)')
 
-    controller = None
-    while controller is None:
-        for device in hid.enumerate(0, 0):
-            # looking for devices matching Nintendo's vendor id and JoyCon product id
-            if device['vendor_id'] == VENDOR_ID and device['product_id'] in (PRODUCT_ID_JL, PRODUCT_ID_JR, PRODUCT_ID_PC):
-                controller = device
-                break
-        else:
-            await asyncio.sleep(2)
-
+    controller = await get_blt_hid_device()
     logger.info(f'Found controller "{controller}".')
 
     with AsyncHID(path=controller['path'], loop=loop) as hid_controller:
@@ -96,9 +83,14 @@ async def _main(loop):
 
 if __name__ == '__main__':
     # check if root
-    if not os.geteuid() == 0:
+    if os.geteuid() != 0:
         raise PermissionError('Script must be run as root!')
 
+    # h = lambda bla: list(map(hex, bla))
+    # report = OutputReport()
+    # report.set_left_rumble_data(1253, 0.012)
+    # exit()
+
     # setup logging
     log.configure()
 
diff --git a/setup.py b/setup.py
index de46acb..7743742 100644
--- a/setup.py
+++ b/setup.py
@@ -2,7 +2,7 @@
 from setuptools import setup, find_packages
 
 setup(name='joycontrol',
-      version='0.14',
+      version='0.15',
       author='Robert Martin',
       author_email='martinro@informatik.hu-berlin.de',
       description='Emulate Nintendo Switch Controllers over Bluetooth',
@@ -10,7 +10,7 @@ setup(name='joycontrol',
       package_data={'joycontrol': ['profile/sdp_record_hid.xml']},
       zip_safe=False,
       install_requires=[
-          'hid', 'aioconsole', 'dbus-python', 'crc8'
+          'hid', 'aioconsole', 'dbus-python'
       ]
       )