Efento SP. J.
Ul.Krupnicza 14/5
31-123 Kraków
humidity sensor will require 89.3 KB of data per month. It is safe to assume that the monthly data usage
of a single device with three slots is 150 kB. This includes firmware updates and configuration changes.
Battery life
The battery life of a device depends on many factors and it is not easy to build a model that will precisely
determine this time. Efento NB-IoT sensors battery life time is up to 10 years or 130,000 transmissions.
The main factors affecting battery life are:
●
Signal quality
- the worse the signal quality, the greater the number of retransmissions is
necessary to send data to the server. The number of retransmissions is represented by the ECL
parameter and battery life is significantly reduced at higher ECL values
(1 or 2)
●
Transmission period
- the more frequent the transmissions, the shorter the battery life of the
device. With brand new batteries, the device should send data about 130,000 times
(assumptions: room temperature, ECL = 0, 20 measurements / transmission, transmission period
small enough to make 130,000 transmissions within 10 years)
●
Ambient temperature
- in lower temperatures the batteries discharge faster. Lithium-ion
batteries used in Efento sensors should not operate beyond the range specified in the device's
technical card
The table below presents expected battery life time and monthly data usage depending on the settings
and signal conditions (ECL). The values below are values for a temperature and humidity sensor.
CAUTION:
Efento recommends to treat the battery life time calculations indicatively, and
always assume that the real battery life time will be shorter due to many factors,
which could not be included in the model.
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