diff --git a/flash.py b/flash.py
new file mode 100644
index 0000000..c8fa12f
--- /dev/null
+++ b/flash.py
@@ -0,0 +1,49 @@
+import argparse
+import struct
+
+
+def get_argparser():
+    parser = argparse.ArgumentParser(description="MQTT-controlled 4-channel DDS signal generator")
+
+    parser.add_argument("cidr", nargs=1,
+                        metavar=("Client_CIDR"),
+                        help="IPv4 Address of Humpback-DDS in CIDR notation")
+    parser.add_argument("mac_addr", nargs=1,
+                        metavar=("Client_MAC"),
+                        help="MAC Address of Humpback-DDS")
+    parser.add_argument("broker_ip", nargs=1,
+                        metavar=("Broker_IP"),
+                        help="IP address of MQTT broker")
+    parser.add_argument("name", nargs=1,
+                        metavar=("Name"),
+                        help="Device name of Humpback-DDS")
+
+    return parser
+
+
+def write_record(f, key, value):
+    key_size = len(key) + 1
+    value_size = len(value)
+    record_size = key_size + value_size + 4
+    f.write(struct.pack("<l", record_size))
+    f.write(key.encode())
+    f.write(b"\x00")
+    f.write(value)
+
+
+def write_end_marker(f):
+    f.write(b"\xff\xff\xff\xff")
+
+
+def main():
+    args = get_argparser().parse_args()
+    with open("flash_config.bin", "wb") as fo:
+        write_record(fo, "CIDR", args.cidr[0].encode())
+        write_record(fo, "MAC", args.mac_addr[0].encode())
+        write_record(fo, "BrokerIP", args.broker_ip[0].encode())
+        write_record(fo, "Name", args.name[0].encode())
+        write_end_marker(fo)
+
+
+if __name__ == "__main__":
+    main()
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