User Guide | COMFORT LwM2M | NB-IoT / LTE-Cat-M1
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4.6.1.1 Automatic Network Attachment
If a single-operator Nano SIM card is inserted into the product, it will automatically attach to the
network.
If a multi-operator or multi-technology Nano SIM card is inserted into the product, it will automatically
search and select the best operator or technology at product startup (based on the list of operators
supported by the SIM card).
During the network attachment process, the green and red LEDs will alternately blink for 50 ms every
second.
If the network attachment fails, the red LED will stay on for 5 seconds. By default, the product will
attempt 2 network attachments every 12 hours. This mechanism helps to preserve the product's
battery life in case of a poor network connection. These 2 parameters (number of network attachment
attempts and waiting time between two network attachment attempts) can be configured via the NFC
IoT Configurator app.
As long as the product has not been attached to the network at least once, for each failed attachment
attempt, the red LED will stay on for 5 seconds.
4.6.1.2 Manual Network Attachment
Once the network attachment is successful, the user can choose to manually attach to a specific
operator via the NFC IoT Configurator app.
📱
Go to the "CONFIGURATION" menu of the sensor => Select the "NETWORK" section =>
Configure the "Network Selection" parameter to manual mode => Specify the MCC-MNC
code corresponding to the network to which the product should connect in manual mode
using the "Network to Use in Manual Mode" parameter => Apply the new configuration to
the product via NFC.
It is also possible to select the technology used by the product to connect to the network
(NB-IoT or LTE-Cat-M1) using the "Connection Preference" parameter.
Once the operator is selected, the product will automatically restart and operate on that operator,
even after subsequent power cycles.
ATTENTION
If the manually selected network is not accessible (not supported by the SIM card or no network
coverage), then the product will not be attached to any network.
