Efento SP. J.
Ul.Krupnicza 14/5
31-123 Kraków
Logger stores up to 60 000 measurements in its memory. In case of any issues that block the
communication between logger and server (network issue, server issue, etc.), if the ACKs are enabled,
the logger will resent the missing data to the server.
In order to set the transmission interval:
1. Connect to the logger, tap on the three dots in the upper right corner -> “Advanced” -> “Sending
interval”
2. Set the new transmission interval - remember that it can’t be less than measurement interval and
more than 60 times the measurement interval
3. Set the ACK interval. You can set it to:
a. Always - every data frame sent by the logger will require the ACK form the server. If the
data has not reached the server, it will be retransmitted once the connection is
reestablished
b. Every - you can set how often the device should require the ACK from the server (e.g.
every 3rd transmission, every 24th transmission). This is a good balance between making
sure the data reaches the server and battery lifetime
Transfer limit
Efento NB-IoT logger allows you to limit the number of transmissions in a given period of time. For
instance, you can set the device to be able to send the data maximum 5 times in a 30 minutes window.
This feature allows you to control the battery life time in an environment, in which the small fluctuations
of the measurements would trigger the transmision very often. By default this function is disabled (there
is no transfer limit set).
You can set up two parameters of the transfer limit function: number of transmissions (N) and time
period (T). After each successful transmission a transmission counter increments by 1. The counter
decrements every time period (T). If a transmission is triggered, but the counter is equal or greater than
the set number of transmissions (N), the communication with the server is blocked, until the counter
derements to a value below the number of transmissions (N). This applies only to regular transmissions
and threshold triggered transmissions. Transmission triggered over Bluetooth will always be sent to the
server.
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