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SBS Spec Coverage
For detailed descriptions on how to use each function, please refer to the Smart Battery System spec.
| Functions | Code | Access | Data | Implemented |
|---|---|---|---|---|
| ChargingCurrent | 0x14 | w | mA (u16) | ❌ |
| ChargingVoltage | 0x15 | w | mV (u16) | ❌ |
For detailed descriptions on how to use each function, please refer to the Smart Battery System spec.
| Functions | Code | Access | Data | Implemented |
|---|---|---|---|---|
| ManufacturerAccess* | 0x00 | r/w | word | - |
| RemainingCapacityAlarm | 0x01 | r/w | mAh or 10mWh | ❌ |
| RemainingTimeAlarm | 0x02 | r/w | minutes | ❌ |
| BatteryMode | 0x03 | r | bit flags | ❌ |
| AtRate | 0x04 | r/w | mA or 10mW | ❌ |
| AtRateTimeToFull | 0x05 | r | minutes | ❌ |
| AtRateTimeToEmpty | 0x06 | r | minutes | ❌ |
| AtRateOK | 0x07 | r | Boolean | ❌ |
| Temperature | 0x08 | r | 0.1°K | ❌ |
| Voltage | 0x09 | r | mV | ❌ |
| Current | 0x0a | r | mA | ❌ |
| AverageCurrent | 0x0b | r | mA | ❌ |
| MaxError | 0x0c | r | percent | ❌ |
| RelativeStateOfCharge | 0x0d | r | percent | ❌ |
| AbsoluteStateOfCharge | 0x0e | r | percent | ❌ |
| RemainingCapacity | 0x0f | r | mAh or 10mWh | ❌ |
| FullChargeCapacity | 0x10 | r | mAh or 10mWh | ❌ |
| RunTimeToEmpty | 0x11 | r | minutes | ❌ |
| AverageTimeToEmpty | 0x12 | r | minutes | ❌ |
| AverageTimeToFull | 0x13 | r | minutes | ❌ |
| ChargingCurrent | 0x14 | r | mA | ❌ |
| ChargingVoltage | 0x15 | r | mV | ❌ |
| BatteryStatus | 0x16 | r | bit flags | ❌ |
| CycleCount | 0x17 | r | count | ❌ |
| DesignCapacity | 0x18 | r | mAh or 10mWh | ❌ |
| DesignVoltage | 0x19 | r | mV | ❌ |
| SpecificationInfo | 0x1a | r | unsigned int | ❌ |
| ManufactureDate | 0x1b | r | unsigned int | ❌ |
| SerialNumber | 0x1c | r | number | ❌ |
| reserved | 0x1d - 0x1f | ❌ | ||
| ManufacturerName | 0x20 | r | string | ❌ |
| DeviceName | 0x21 | r | string | ❌ |
| DeviceChemistry | 0x22 | r | string | ❌ |
| ManufacturerData* | 0x23 | r | data | - |
| reserved | 0x25 - 0x2e | - | ||
| OptionalMfgFunction5* | 0x2f | r/w | data | - |
| reserved | 0x30 - 0x3b | - | ||
| OptionalMfgFunction4* | 0x3c | r/w | word | - |
| OptionalMfgFunction3-1* | 0x3d - 0x3f | r/w | word | - |
* refers to optional fn's that will not be implemented
As there is such a wide range of battery chargers and smart batteries, as well as different ways to electrically connect your smart battery system, a guiding principle of embedded-batteries is to make as little assumptions as possible. The SBS spec, which is the basis of the traits, is used as a guide rather than a strict constraint. Some common deviations and their solutions are listed below:
Charger and smart battery driver authors are given the flexibility on how their driver implements each SBS function. For example, if the smart battery does not have thermistors onboard, a Result with an "not implemented" error can be returned. Application level code must be able to handle the error accordingly.
The SBS spec defines that the smart battery should be able to take control of the communication bus and broadcast alert messages. This functionality requires implementation of bus arbitration and as such, is not planned to be supported.