Temp.

Author: janiversen

pymodbus/pdu/register_message.py

@@ -2,6 +2,7 @@
 from __future__ import annotations
 
 import struct
+from collections.abc import Sequence
 from typing import cast
 
 from pymodbus.datastore import ModbusDeviceContext
@@ -282,7 +283,7 @@ async def update_datastore(self, context: ModbusDeviceContext) -> ModbusPDU:
         if not 0x0000 <= self.or_mask <= 0xFFFF:
             return ExceptionResponse(self.function_code, ExceptionResponse.ILLEGAL_VALUE)
         values = await context.async_getValues(self.function_code, self.address, 1)
-        values = (values[0] & self.and_mask) | (self.or_mask & ~self.and_mask)
+        values = (cast(Sequence[int | bool], values)[0] & self.and_mask) | (self.or_mask & ~self.and_mask)
         rc = await context.async_setValues(
             self.function_code, self.address, cast(list[int], [values])
         )