Quectel CC660D-LS Satellite NTN Network

The Quectel CC660D-LS series supports IoT-NTN (satellite), It complies with 3GPP Release 17 standards, ensuring optimal performance for advanced IoT applications

Prerequisites

• Monogoto SIM

• CC660D-LS

Set up EVB Kit

Quectel BG770A-SN modem

Set up the EVB Kit

• Connect the LTE antenna and GPS antenna

• Insert the Monogoto SIM

Connect your PC to the EVB Kit

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:

RDY
APP RDY

Enter AT, if the connection with the CC660D-LS modem has been established, the board will answer with OK.

Connect the CC660D-LS to Monogoto

Keep the AT Commands manual next to you for more details about the commands. Click here to download the latest version.

Reset the modem to its default configuration:

Restore factory settings:

AT&F1

Set the error reporting to verbose, resulting in more descriptive error messages (optional):

AT+CEREG=2

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

Example response: Quectel_Ltd Quectel_CC660D-LS Revision: CC660DLSAAR01A01

Request the IMSI (International Mobile Subscriber Identity):

AT+CIMI

Request the ICCID (Integrated Circuit Card ID), which is the identification number of the SIM card

AT%CCID

Network Configuration

It is possible to let the modem select the network automatically.

Set the APN to data.mono:

AT+QCGDEFCONT="IP","data.mono"

Lock the modem to a specific region/band

AT+QBAND=1,23

Although the modem may support many different NTN bands,

Band 23 = Canada

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

band 256 = S band Europe

Send registration status

AT+CEREG=2

Set GPS location

AT+QGNSSINFO=LATITUDE,LONGITUDE,ALTITUDE,SPEED,ACCURACY

example

AT+QGNSSINFO=33.998737,-84.095023,40,0,0

Check the current network registration status

AT+QENG=0

Check the radio signal strength and signal quality:

AT+CSQ

+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.

Validate if your device received an IP address:

AT+CGPADDR

Expected response: +CGPADDR: 1,XX.XXX.XX.XXX

Do you see an IP address? Congratulations! You’ve successfully connected the Quectel modem to Monogoto 🎉

Test the connection by sending UDP payload

When using Non-Terrestrial Networks, data can only be sent using UDP.

In order to send data using UDP, 3 AT Commands needs to be sent:

1. Create UDP socket

2. Send UDP data

3. Close UDP Socket

1. Create UDP socket

AT+QIOPEN=1,0,"UDP","18.199.15.247",1055,1234,0

Example response:

+QIOPEN:0,0 AT+QISEND=0,2,12

2. Send UDP data

AT+QISEND=0,11,Hello World

Example response:

OK SEND OK

Make sure to exactly count the number of characters you send, or you will receive an error.

3. Close UDP socket

End your UDP session by closing the UDP socket.

AT+QICLOSE=0

Expected response: OK

Useful Links

• Quectel CC660D-LS product page

• Quectel CC660D-LS AT Command

• Quectel CC660D-LS TCP/IP Application Note