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Correct process_raw_value for modbus sensor (#102032)

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jan iversen 2023-10-18 17:25:57 +02:00 committed by GitHub
parent 5f35eecf93
commit 3bb23a6d88
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1 changed files with 16 additions and 41 deletions
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57
homeassistant/components/modbus/base_platform.py
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@ -194,22 +194,25 @@ class BaseStructPlatform(BasePlatform, RestoreEntity):
registers.reverse()
return registers
def __process_raw_value(
self, entry: float | int | str | bytes
) -> float | int | str | bytes | None:
def __process_raw_value(self, entry: float | int | str | bytes) -> str | None:
"""Process value from sensor with NaN handling, scaling, offset, min/max etc."""
if self._nan_value and entry in (self._nan_value, -self._nan_value):
return None
if isinstance(entry, bytes):
return entry
return entry.decode()
if entry != entry: # noqa: PLR0124
# NaN float detection replace with None
return None
val: float | int = self._scale * entry + self._offset
if self._min_value is not None and val < self._min_value:
return self._min_value
return str(self._min_value)
if self._max_value is not None and val > self._max_value:
return self._max_value
return str(self._max_value)
if self._zero_suppress is not None and abs(val) <= self._zero_suppress:
return 0
return val
return "0"
if self._precision == 0:
return str(int(round(val, 0)))
return f"{float(val):.{self._precision}f}"
def unpack_structure_result(self, registers: list[int]) -> str | None:
"""Convert registers to proper result."""
@ -219,6 +222,8 @@ class BaseStructPlatform(BasePlatform, RestoreEntity):
byte_string = b"".join([x.to_bytes(2, byteorder="big") for x in registers])
if self._data_type == DataType.STRING:
return byte_string.decode()
if byte_string == b"nan\x00":
return None
try:
val = struct.unpack(self._structure, byte_string)
@ -227,49 +232,19 @@ class BaseStructPlatform(BasePlatform, RestoreEntity):
msg = f"Received {recv_size} bytes, unpack error {err}"
_LOGGER.error(msg)
return None
# Issue: https://github.com/home-assistant/core/issues/41944
# If unpack() returns a tuple greater than 1, don't try to process the value.
# Instead, return the values of unpack(...) separated by commas.
if len(val) > 1:
# Apply scale, precision, limits to floats and ints
v_result = []
for entry in val:
v_temp = self.__process_raw_value(entry)
# We could convert int to float, and the code would still work; however
# we lose some precision, and unit tests will fail. Therefore, we do
# the conversion only when it's absolutely necessary.
if isinstance(v_temp, int) and self._precision == 0:
v_result.append(str(v_temp))
elif v_temp is None:
v_result.append("0")
elif v_temp != v_temp: # noqa: PLR0124
# NaN float detection replace with None
if v_temp is None:
v_result.append("0")
else:
v_result.append(f"{float(v_temp):.{self._precision}f}")
v_result.append(str(v_temp))
return ",".join(map(str, v_result))
# NaN float detection replace with None
if val[0] != val[0]: # noqa: PLR0124
return None
if byte_string == b"nan\x00":
return None
# Apply scale, precision, limits to floats and ints
val_result = self.__process_raw_value(val[0])
# We could convert int to float, and the code would still work; however
# we lose some precision, and unit tests will fail. Therefore, we do
# the conversion only when it's absolutely necessary.
if val_result is None:
return None
if isinstance(val_result, int) and self._precision == 0:
return str(val_result)
if isinstance(val_result, bytes):
return val_result.decode()
return f"{float(val_result):.{self._precision}f}"
return self.__process_raw_value(val[0])
class BaseSwitch(BasePlatform, ToggleEntity, RestoreEntity):