Quectel BG770A-SN Satellite NTN Network
Last updated
Last updated
The Quectel BG770A-SN series supports IoT-NTN (satellite), LTE Cat M1/Cat NB2, and EGPRS, offering ultra-low power consumption. It complies with 3GPP Release 17 standards, ensuring optimal performance for advanced IoT applications
Monogoto SIM
Connect the LTE antenna and GPS antenna
Insert the Monogoto SIM
Use the USB to UART converter cable to connect your computer to the COM1 MAIN port of the EVB Kit
When using Windows, install the driver using the disk or USB stick provided by Quectel.
Connect to the EVB kit using a terminal program. You can use PuTTY for Windows, or screen, minicom, or miniterm for Mac or Linux.
Once the modem has started, it will report:
Enter AT, if the connection with the BG770A-SN modem has been established, the board will answer with OK.
Keep the AT Commands manual next to you for more details about the commands. Click here to download the latest version.
Restore factory settings:
Set the error reporting to verbose, resulting in more descriptive error messages (optional):
Check the status of the SIM card. The correct response should be: +CPIN: READY
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.
Request the product type, hardware, and firmware version:
Example response: BG770ASNAAR02A01_01.202.01.202
Request the IMSI (International Mobile Subscriber Identity):
Request the ICCID (Integrated Circuit Card ID), which is the identification number of the SIM card
It is possible to let the modem select the network automatically.
Set the APN to data.mono:
automatically select modem
The modem can be configured to automatically select the most appropriate band or region without manual intervention.
Although the modem may support many different NTN bands,
Band 23 = United States region
band 255 = L band Global (Taiwan, Australia, New Zealand, Japan)
band 256 = S band Europe
Enable GNSS
Reboot module
Disable radio
Configure the modem to only use NB-IoT NTN not LTE Cat-M1:
Enable TA and SIB notifications
Send registration status
Enable radio
Wait for a response::
Check the current network registration status
request a specific network measurement, such as signal strength, noise levels, or other metrics:
Example response: %MEAS:Signal Quality:RSRP= -115,RSRQ= -15,SINR= -3,RSSI= -120.
Reports the information of serving cells
Example response:
+QENG: "servingcell","NOCONN","eMTC","FDD",901,98,2C480D,29,7699,255,1,1,7ED,-122,-8,-114,5,0
Check the radio signal strength and signal quality:
+CSQ returns 2 values separated by a comma. The first value represents the signal strength and provides a value between 0 and 31; higher numbers indicate better signal strength. The second value represents the signal quality indicated by a value between 0 and 7. If AT+CSQ returns 99,99, the signal is undetectable or unknown.
Expected response: +CGPADDR: 1,XX.XXX.XX.XXX
Do you see an IP address? Congratulations! You’ve successfully connected the Quectel modem to Monogoto 🎉
A UDP payload test when the modem has an active data connection with a Satellite.
Send UDP Payload to the IP address 34.192.142.126:
response:
Set and Active UDP Socket
response:
Send UDP Socket
response:
info UDP Socket
response:
Close UDP Socket
response:
When transitioning between satellite and public networks using the Murata Kit use the following commands:
Command for Switching to Public Network:
This command activates the CAT-M mode for public networks, allowing the device to switch from satellite connectivity to a cellular public network.
Command for Switching Back to Satellite Network
This command activates the NBNTN mode, returning the device to satellite network connectivity.
