6/24/2023 0 Comments Dell watchdog timer utility![]() In case the DDV WMI interface version available on your Dell notebook is not Use the debugfs interface to access the raw fan/thermal sensor buffer data.Ĭompare the data with the built-in UEFI diagnostics. Load the dell-wmi-ddv driver, use the force module param To test different sensor type values, since on some machines this data is Related methods (sometimes overwriting static ACPI data fields can be used Use the built-in UEFI diagostics to view sensor types/values for fan/thermal Try to deduce the meaning of a certain WMI method by comparing the controlįlow with other ACPI methods (_BIX or _BIF for battery related methods Reverse-Engineering the DDV WMI interface ¶įind a supported Dell notebook, usually made after ~2020.ĭump the ACPI tables and search for the WMI device (usually called "ADDV").ĭecode the corresponding bmof data and look at the ASL code. Until this issue is resolved, the driver cannot use the aboveĪlgorithm. Linux and Windows, which distorts the serial number of ACPI batteries on many This are differences in the handling of the ToHexString() ACPI opcode between Outdated and does not match the algorithm described above. The ACPI battery matching algorithm currently used inside the driver is Performs an analysis of the battery and returns a status code: Returns the ePPID of the battery as an ASCII string. Returns the cycle count of the battery as an u16. Returns the capacity of the battery in percent as an u16. WMI method BatteryRelativeStateOfCharge() ¶ Returns a manufacture-defined value as an u16. Returns the voltage flow of the battery in mV as an u16. Returns the current flow of the battery in mA as an s16. Returns the temperature of the battery in tenth degree kelvin as an u16. Returns the chemistry of the battery as an ASCII string. Returns the serial number of the battery as an u16. The data format needs to be verified on more machines. The date is encoded in the following manner:īits 5 to 8 contain the manufacture month.īits 9 to 15 contain the manufacture year biased by 1980. Returns the manufacture date of the battery as an u16. Returns the manufacture name of the battery as an ASCII string. Returns the full charge capacity of the battery in mAh as an u16. Returns the design capacity of the battery in mAh as an u16. Likely to follow this standard in some way. Smart Battery Data Specification, so unknown battery-related methods are The data format of many battery-related methods seems to be based on the Return malformed data in case of an error. The format of the output should be thoroughly checked, since many methods can If the function has multiple outputs, when an ACPI packageĬontaining the outputs in the same order is returned If the function has only a single output, then an ACPI object Other WMI methods may ignore this argument or interpret itĭifferently. With the first 8 bit being used to specify the battery when using battery-related void ThermalSensorInformation( uint32 arg2, uint32 RawSize, uint8 RawData) Įach WMI method takes an ACPI buffer containing a 32-bit index as input argument, void FanSensorInformation( uint32 arg2, uint32 RawSize, uint8 RawData) void ReturnVersion( uint32 arg2, uint32 argr) void BatteryeRawAnalyticsABlock( uint32 arg2, uint32 RawSize, uint8 RawData) void BatteryDesignVoltage( uint32 arg2, uint32 argr) void BatteryeRawAnalytics( uint32 arg2, uint32 RawSize, uint8 RawData) void BatteryeRawAnalyticsStart( uint32 arg2, uint32 argr) void BatteryePPID( uint32 arg2, string argr) void Batter圜ycleCount( uint32 arg2, uint32 argr) void BatteryRelativeStateOfCharge( uint32 arg2, uint32 argr) void BatteryManufactureAceess( uint32 arg2, uint32 argr) void BatteryVoltage( uint32 arg2, uint32 argr) void Batter圜urrent( uint32 arg2, uint32 argr) void BatteryTemperature( uint32 arg2, uint32 argr) void Batter圜hemistryValue( uint32 arg2, string argr) void BatterySerialNumber( uint32 arg2, uint32 argr) void BatteryManufactureDate( uint32 arg2, uint32 argr) void BatteryManufactureName( uint32 arg2, string argr) void BatteryFullChargeCapacity( uint32 arg2, uint32 argr) void BatteryDesignCapacity( uint32 arg2, uint32 argr) The WMI interface description can be decoded from the embedded binary MOF (bmof) Optional Firmware Version/Revision (FFF).Īll information regarding the Dell ePPID was gathered using Dell supportĭocumentation and this website. Manufacturing Year/Month/Date (YMD) in base 36, with Y being the last digit Part number with the first character being a filling number (PPPPPP). It has a form similar to CC-PPPPPP-MMMMM-YMD-SSSS-FFF The Dell ePPID is used to uniquely identify components in Dell machines, Dell ePPID (electronic Piece Part Identification) ¶ Trial-and-error, please keep that in mind. The interface is regarded as internal by Dell, so no vendorĭocumentation is available.
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