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Battery status vs battery state of charge (SoC) - common page 82

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Total Posts: 1

Joined 2019-04-30

PM

We have a sensor that supports ANT+, we want to report the battery state of charge (SoC) via ANT+. The best option we found is via common page 82. We couldn't find a rational behind the various battery status options given in the battery voltage descriptive bit field. If someone knows were we can find this, it would be helpful.

Is a mapping as given below in line with how the battery status in the descriptive field should be used?
- Actual battery SoC > 60% ==> ANT+ Battery status = Good
- Actual battery SoC <=60%, > 40% ==> ANT+ Battery status = Ok
- Actual battery SoC <=40%, > 20% ==> ANT+ Battery status = Low
- Actual battery SoC <= 20% ==> ANT+ Battery status = Critical

Would a display be able to properly show the battery information if we report it like this?      
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Total Posts: 370

Joined 2012-06-27

PM

Unfortunately there is not that level of consistency in how battery status is encoded or used.

Most displays only use it to show an alert when it hits low or critical. So you would want choose a threshold for low that you want to indicate to users at.

If you are looking to communicate a finer level of detail, the voltage field is the best method with the current definitions, though it does not give SoC directly.

Ian      

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Ian Haigh