Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: georgevigelette

src/openlifu/io/LIFUDFU.py

@@ -13,8 +13,8 @@
 import logging
 import struct
 import time
-from typing import TYPE_CHECKING, Callable
 import unittest
+from typing import TYPE_CHECKING, Callable
 
 from openlifu.io.LIFUConfig import OW_ERROR, OW_I2C_PASSTHRU
 

src/openlifu/io/LIFUTXDevice.py

@@ -5,7 +5,7 @@
 import re
 import struct
 from dataclasses import dataclass, field
-from typing import TYPE_CHECKING, Annotated, Dict, List, Literal, Optional
+from typing import TYPE_CHECKING, Annotated, Dict, List, Literal
 
 import numpy as np
 
@@ -397,7 +397,7 @@ def get_hardware_id(self, module:int=0) -> str:
             logger.error("Unexpected error during process: %s", e)
             raise  # Re-raise the exception for the caller to handle
 
-    def read_config(self, module:int=0) -> Optional[LifuUserConfig]:
+    def read_config(self, module:int=0) -> LifuUserConfig | None:
         """
         Read the user configuration from device flash.
 
@@ -450,7 +450,7 @@ def read_config(self, module:int=0) -> Optional[LifuUserConfig]:
             logger.exception("Unexpected error reading config")
             raise
 
-    def write_config(self, config: LifuUserConfig, module:int=0) -> Optional[LifuUserConfig]:
+    def write_config(self, config: LifuUserConfig, module:int=0) -> LifuUserConfig | None:
         """
         Write user configuration to device flash.
 
@@ -517,7 +517,7 @@ def write_config(self, config: LifuUserConfig, module:int=0) -> Optional[LifuUse
             logger.exception("Unexpected error writing config")
             raise
 
-    def write_config_json(self, json_str: str, module:int=0) -> Optional[LifuUserConfig]:
+    def write_config_json(self, json_str: str, module:int=0) -> LifuUserConfig | None:
         """
         Write user configuration from a JSON string.
 
@@ -982,7 +982,7 @@ def async_mode(self, enable: bool | None = None) -> bool:
             else:
                 payload = None
 
-            r = self.uart.send_packet(id=None, packetType=OW_CONTROLLER, command=OW_CMD_ASYNC, addr=0, data=payload)
+            r = self.uart.send_packet(id=None, packetType=OW_CMD, command=OW_CMD_ASYNC, addr=0, data=payload)
             self.uart.clear_buffer()
             # r.print_packet()
             if r.packet_type == OW_ERROR:
@@ -1332,7 +1332,7 @@ def write_block(self, identifier: int, start_address: int, reg_values: List[int]
             logger.error("Unexpected error in write_block: %s", e)
             raise  # Re-raise the exception for the caller to handle
 
-    def read_block(self, identifier: int, start_address: int, count: int) -> Optional[List[int]]:
+    def read_block(self, identifier: int, start_address: int, count: int) -> List[int] | None:
         """
         Read a block of consecutive register values from the TX device.
 

src/openlifu/io/LIFUUserConfig.py

@@ -3,14 +3,15 @@
 import json
 import logging
 import struct
+import zlib
 from dataclasses import dataclass
 from typing import Any, Dict
 
 logger = logging.getLogger(__name__)
 
 # Constants from C code
 LIFU_MAGIC = 0x4C494655  # 'LIFU'
-LIFU_VER = 0x00010002    # v1.0.0
+LIFU_VER = 0x00010002    # v1.0.2
 
 @dataclass
 class LifuUserConfigHeader:
@@ -139,6 +140,9 @@ def to_wire_bytes(self) -> bytes:
         # Update header with JSON length
         self.header.json_len = len(json_bytes)
 
+        # Update header CRC based on JSON payload (16-bit from CRC32)
+        self.header.crc = zlib.crc32(json_bytes) & 0xFFFF
+
         # Build wire format
         return self.header.to_bytes() + json_bytes