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(info) The actual value of your devices connection statistics is shown in the Lobaro platform under "Device Properties".

(warning) For "unstable" network coverage Lobaro can 't not guarantee the correct function of the cellular uplinks and battery lifes runtimes under all conditions. Please consider a different location for the particular device.

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Source: https://infocenter.nordicsemi.com/index.jsp?topic=%2Fref_at_commands%2FREF%2Fat_commands%2Fmob_termination_ctrl_status%2Fproc_cesq_set.html

Geo Location Lookup

There are multiple ways to trace where a mobile device is.

In General the following information is required and transmitted in the device status packets:

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  • TAC → lac (dezimal), 0xcb20 = 52000
    • Tracking Area Code (TAC) sometimes called Location Area Code (LAC)
  • CI → cid (dezimal), 0x299A605 = 43623941
    • Cell ID (CID / CID)

Here are some resources to use:

ResourceDescription

https://www.cellmapper.net/

Lookup Cells

(warning)  Account needed - not for commercial use

platform.eNodeB.towerID (based on CI )

        var ci = parseInt("01DD4E02",16);
        var towerID =parseInt(ci/256,10); → z.B. 122190

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https://my.unwiredlabs.com/dashboard/login

LTE Location API

Account required

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LTE network error codes

Newer firmware of Lobaro products report potential ESM (EPS Session Management) and EMM (EPS Mobility Management) errors in their status uploads.

EMM Error codes

Source: ETSI TS 124 301 V14.5.0 - Table 9.9.3.9.1: ESM cause information element

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E.g.: +CNEC_EMM: 19 is error code 19 which is 0b10011 which corresponds to ESM failure (see table below)

ESM Error codes

Source: ETSI TS 124 301 V14.5.0 - Table 9.9.4.4.1: ESM cause information element

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CNEC_ESM: 27,0 is error code 27 with cid 0, and 27 is binary 1b11011 which corresponds to Missing or unknown APN

NB-IoT network coverage

Please see: https://iotcreators.com/network/?#G


For testing the coverage you can use our hardware with our USB Config Adapter and the Lobaro Maintenance Tool to observe the log during connection.

Or test yourself using a professional 3rd party network tester e.g. from ENQT.

Modem specifics (nRF9160)

Today Lobaro is using the Nordic nRF9160 in most of it's products. Beside that Lobaro Firmware the Modem Firmware from Nordic is running on a separate core.

Modem Parameter

ParameterBeschreibungValues
conMode

regRegistration
  • 1 = Home Network
  • 5 = Roaming
tacTracking Area Code
ciCell ID
psm
Power Safe mode Intervall
PSM Activity Timer (T3324)

See for info:

tauLong-Periodic TAU Timer (Extended T3412)
tauTracking Area Update
SNRSignal to Noise Ratio

Integrated Circuit Card Identifier (ICCID)

Please see: https://help.1nce.com/dev-hub/docs/sim-cards-knowledge

NB-IoT / LTE-M Bands

Each Lobaro hardware only supports a subset of bands. 

Operators might change bands without prior notice. 


BandUplink (TX)Downlink (RX)BandwidthDuplex-ModeUsed by
B31710-1785 MHz 1805-1880MHz75 MHz

B8

880 - 915 MHz

925 - 960 MHz

25 MHz

HD-FDD

Telekom

B20

832 - 862 MHz

791 - 821 MHz

30 MHz

HD-FDD

Vodafone

The NB-IoT Bands selected for Europe are B3 (1800 MHz), B8 (900 MHz) and B20 (800 MHz). B8 and B20 are supported by all Lobaro devices, B3 might be available on recent variants too.

Known issues

Remote Update for Modem Firmware not possible (relevant until today)

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