Satellite NTN Network

The guide provided below contains AT command instructions for the Murata LBAD0XX1SC-DM module designed to work with Skylo Satellite IoT for Non-Terrestrial Networks (NTN).

Murata LBAD0XX1SC-DM The Type 1SC module is the world’s smallest Cat. M1/NB-IoT module with global certification. It supports GPS/GNSS, OpenMCU, and Integrated SIMS.

Set up Murata Kit (LBAD0XX1SC-DM-EVK2)

Set up the EVK Kit

  • Connect the UBC Cable to the EVK kit.

  • Connect the LTE antenna

  • Insert the Monogoto SIM

Connect your PC to the EVK Kit

Use the USB to connect your computer to the AT CMD port of the EVK Kit

When using Windows, install the driver using the disk or USB stick provided by Murata.

Connect to the EVK kit using a terminal program. You can use PuTTY for Windows, or Screen, minicom, or Miniterm for Mac or Linux.

Enter AT, if the connection with the LBAD0XX1SC-DM modem has been established, the board will answer with OK.

Connect the LBAD0XX1SC to Skylo

Keep the AT Commands manual next to you for more details about the commands. Click here to download the latest version, and scroll down to Documentation and Resources to find the AT Commands Manual.

Reboot the Module:

ATZ

Check the status of the SIM card. The correct response should be: +CPIN: READY

AT+CPIN?

If you receive an error, the SIM may not be inserted properly or the SIM is protected with a PIN. By default, Monogoto SIMs are not PIN-protected.

Query device information

Request the product type, hardware, and firmware version:

ATI

Request the IMSI (International Mobile Subscriber Identity):

AT+CIMI

Set the NTN Parameter (enter the commands)

AT%SETACFG="radiom.config.multi_rat_enable","true"    
AT%SETACFG="radiom.config.preferred_rat_list","none"  
AT%SETACFG="radiom.config.auto_preference_mode","none"
AT%SETACFG="ntn.conf.gnss_in_use","egnss"
AT%GETACFG="ntn.conf.gnss_in_use"
AT%SETACFG="modem_apps.Mode.AutoConnectMode","true"

Define the NB-IoT NTN

AT%RATIMGSEL=2
AT%RATACT="NBNTN",1

Lock the modem to a specific region/band

AT%SETCFG="BAND","255"

Although the modem may support many different NTN bands,

23 = United States region

255 = L band Global (Taiwan, Australia, New Zealand, Japan)

256 = S band Europe

Reset in order for the parameters to take effect

ATZ

Network Activation

Disable radio

AT+CFUN=0

Set GPS location

AT%NTNCFG="FIX",LATITUDE,LONGITUDE,40,0

example

AT%NTNCFG="FIX",33.998737,-84.095023,40,0

Set the APN to data.mono:

AT+CGDCONT=1,"IP","DATA.MONO"

Enable SIB31 reception notification:

AT%NOTIFYEV="SIB31",1

Report notification about Timing Advance calculation:

AT%TADJEV=1

Enable RRC State notification:

AT%NOTIFYEV="RRCSTATE",1

Send registration status

AT+CEREG=2

Enable radio

AT+CFUN=1

Example response:

%NOTIFYEV: "SIB31",....
%TADJEVU: "TA",...
%TADJEVU: "TAC",...
+CEREG: 5,"07ED",....

Test the connection by sending a PING

A PING test can be performed to test if the modem has an active data connection with a Satellite.

Send 3 PINGs to the IP address 8.8.8.8:

AT%PINGCMD=0,"8.8.8.8",3

Example response:

%PINGCMD:2,"8.8.8.8",6337,117
%PINGCMD:3,"8.8.8.8",4993,117

Great work on connecting the Murata LBAD0XX1SC-DM to Monogoto! Have a look at the Things logs in the Monogoto Console to find more details about the established connection.

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