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Sensor protection
19. Sensor protection
19.1. Special probes
There are some sensor probes which include special protection against sunlight and bad environmental
conditions. For instance, the temperature, humidity and pressure probe has a special filter which allows humidity
measurement but offers protection against water.
However, a lot of sensor probes include just a standard protection. If the final application involves bad environmental
conditions and a lot of sunlight hours, Libelium suggests the usage of a solar radiation shield.
In addition, refer to corresponding section for more information about sensor probes.
20. Battery
Libelium provides a 6600 mA·h rechargeable battery inside Waspmote Plug & Sense!.
Waspmote has a control and safety circuit which makes sure the battery charge current is always adequate. The
following image shows a battery discharging for a typical load and for a specific case.
Figure: Typical discharging curve for the 6600 mA·h battery
Note:
When recharging, if the battery is near 0%, it will take some time before the battery level increases.
Note:
It is normal to see some battery level variations during the charging periods due to the Waspmote charging
circuitry. To know the real battery level of the node, it is recommended to measure it when the node is not being
recharged and also with sensors and radio modules switched off.
Note:
The on/off button can be in on or off position to charge the battery.