diff --git a/joycontrol/controller_state.py b/joycontrol/controller_state.py
index dcc0460..7eef5b7 100644
--- a/joycontrol/controller_state.py
+++ b/joycontrol/controller_state.py
@@ -27,6 +27,8 @@ class ControllerState:
                 calibration = LeftStickCalibration.from_bytes(calibration_data)
 
             self.l_stick_state = StickState(calibration=calibration)
+            if calibration is not None:
+                self.l_stick_state.set_center()
 
         # create right stick state
         if controller in (Controller.PRO_CONTROLLER, Controller.JOYCON_R):
@@ -39,6 +41,8 @@ class ControllerState:
                 calibration = RightStickCalibration.from_bytes(calibration_data)
 
             self.r_stick_state = StickState(calibration=calibration)
+            if calibration is not None:
+                self.r_stick_state.set_center()
 
         self.sig_is_send = asyncio.Event()
 
diff --git a/joycontrol/memory.py b/joycontrol/memory.py
index 272cb50..50b7788 100644
--- a/joycontrol/memory.py
+++ b/joycontrol/memory.py
@@ -1,14 +1,28 @@
 
 class FlashMemory:
-    def __init__(self, spi_flash_memory_data=None, size=0x80000):
+    def __init__(self, spi_flash_memory_data=None, default_stick_cal=False, size=0x80000):
+        """
+        :param spi_flash_memory_data: data from a memory dump (can be created using dump_spi_flash.py).
+        :param default_stick_cal: If True, override stick calibration bytes with factory default
+        :param size of the memory dump, should be constant
+        """
         if spi_flash_memory_data is None:
-            self.data = size * [0x00]
-        else:
-            if len(spi_flash_memory_data) != size:
-                raise ValueError(f'Given data size {len(spi_flash_memory_data)} does not match size {size}.')
-            if isinstance(spi_flash_memory_data, bytes):
-                spi_flash_memory_data = list(spi_flash_memory_data)
-            self.data = spi_flash_memory_data
+            spi_flash_memory_data = [0xFF] * size  # Blank data is all 0xFF
+            default_stick_cal = True
+
+        if len(spi_flash_memory_data) != size:
+            raise ValueError(f'Given data size {len(spi_flash_memory_data)} does not match size {size}.')
+        if isinstance(spi_flash_memory_data, bytes):
+            spi_flash_memory_data = list(spi_flash_memory_data)
+
+        # set default controller stick calibration
+        if default_stick_cal:
+            # L-stick factory calibration
+            spi_flash_memory_data[0x603D:0x6046] = [0x00, 0x07, 0x70, 0x00, 0x08, 0x80, 0x00, 0x07, 0x70]
+            # R-stick factory calibration
+            spi_flash_memory_data[0x6046:0x604F] = [0x00, 0x08, 0x80, 0x00, 0x07, 0x70, 0x00, 0x07, 0x70]
+
+        self.data = spi_flash_memory_data
 
     def __getitem__(self, item):
         return self.data[item]
diff --git a/run_controller_cli.py b/run_controller_cli.py
index 0f9365c..c129e1a 100644
--- a/run_controller_cli.py
+++ b/run_controller_cli.py
@@ -147,10 +147,12 @@ async def set_amiibo(controller_state, file_path):
 
 async def _main(args):
     # parse the spi flash
-    spi_flash = None
     if args.spi_flash:
         with open(args.spi_flash, 'rb') as spi_flash_file:
             spi_flash = FlashMemory(spi_flash_file.read())
+    else:
+        # Create memory containing default controller stick calibration
+        spi_flash = FlashMemory()
 
     # Get controller name to emulate from arguments
     controller = Controller.from_arg(args.controller)