Device data graph
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If data history is enabled for your account and device type, you can find a graph of the configured metrics on the Data graph tab of your devices details page. If available, two metrics can be selected to show 2 graphs simultaneously.
The "Zoom" button can be used to focus more on the range of the metric values. The "Table View" button gives access to the underlying data of the graph:
The displayed data can be filtered, sorted, and exported according to your needs, just like all other data tables in KPN Things.
The data-graph is configured for most device types to show battery related characteristics, like batteryVoltage and batteryLevel.
In the current portfolio KPN uses 2 types non rechargeable batteries, 3.0 Volt and 3.6 Volt. There is 1 type rechargeable battery, the 3.7 Volt.
Non rechargeable batteries 3.0V and 3.6V Both the 3.0 and 3.6 type battery will be around the voltage of 3.0V or 3.6 Volt for a long time during their lifespan.
The course has a stable behaviour during the discharge process.
Slight fluctuations in voltage are caused by changes in the internal impedance of the battery which arise when the battery is in rest and becomes active when transmitting data and the power consumption by sensor readings. The ambient temperature is also a factor of importance in these fluctuations.
In the final phase of the battery life, the fluctuations to lower values will be more severe because the battery has more difficulty recovering from the passive to active state when the internal impedance of the battery is increasing.
In the final phase also the stable character will disappear and once the decline has started, it will proceed relatively faster.
How long a device will be able to work on a battery at the end of its lifespan depends on the number and current use of messages and sensor readings initiated by the device per day.
And here too, the ambient temperature is an important factor. Rechargeable LiPo The rechargeable battery has a voltage range from 3.7 Volts to fully charged around 4.2 Volts.
During consumption, the voltage will decrease and with this rechargeable type the degree of discharge is also influenced by the load and the ambient temperature.
A rechargeable battery has a slightly greater drop in voltage in the first phase of the discharge process and more as the battery reaches the end of its lifespan. Between those two phases the drop will be gradual.
If the battery reaches a voltage below 3.6 Volts, it is advisable to charge the battery to ensure proper functioning of the device.
