diff --git a/flashing/flash_firmware.py b/flashing/flash_firmware.py
new file mode 100644
index 0000000..ec79262
--- /dev/null
+++ b/flashing/flash_firmware.py
@@ -0,0 +1,42 @@
+import argparse
+
+from pathlib import Path
+
+from pyocd.core.helpers import ConnectHelper
+from pyocd.core.target import Target
+from pyocd.flash.file_programmer import FileProgrammer
+
+from mac_converter import MacConverter
+
+parser = argparse.ArgumentParser()
+parser.add_argument("-a", "--all", action="store_true", help="Flash softdevice and firmware.")
+parser.add_argument("--only-mac", action="store_true", help="Read only the mac address from controller.")
+parser.add_argument("-s", "--softdevice", action="store", help="File path to softdevice file.", default="../sdk/s140nrf52720/s140_nrf52_7.2.0_softdevice.hex", type=Path)
+parser.add_argument("-f", "--firmware", action="store", help="File path to firmware file.", default="../code/b-parasite/_build/nrf52840_xxaa.hex", type=Path)
+
+args = parser.parse_args()
+
+with ConnectHelper.session_with_chosen_probe() as session:
+
+    board = session.board
+    target: Target = board.target
+
+    if not args.only_mac:
+        if args.all:
+            softdevice_path: Path = args.softdevice
+            print(f"Flashing softdevice {softdevice_path.name}...")
+            FileProgrammer(session).program(str(softdevice_path))
+
+            target.reset_and_halt()
+            target.resume()
+
+        firmware_path: Path = args.firmware
+        print(f"Flashing firmware {firmware_path.name}...")
+        FileProgrammer(session).program(str(firmware_path))
+
+        target.reset_and_halt()
+        target.resume()
+    
+    mac_converter = MacConverter(target)
+    mac_address = mac_converter.get_mac_address()
+    print(f'Device MAC Address: {mac_address}')