Test the Quectel CC660D-LS radio module
Test the Quectel CC660D-LS radio module
Test the Quectel CC660D-LS radio module
The Quectel CC660D-LS is a 3GPP non-terrestrial network (NTN) satellite communication module. This guide contains the configuration and AT commands for the module and evaluation board.
These instructions are for Windows users. If you have a different operating system, adjust the steps accordingly.
Attach the antennae (NTN and GNSS) to the board to the board using the antenna connectors. Use the image below as a reference.
Connect the USB cable to your PC and the board’s UART port. Make sure you’ve installed the USB-to-UART driver on your PC.
Set the jumpers to ensure the correct voltage as described in the Quectel CC660D-LS TE-B User Guide.
In your Windows PC, go to the Control Panel and check your Device Manager for the assigned communications port (COM port) of the evaluation board (EVB).
Open PuTTY (or another SSH client), then set the connection type to Serial.
After establishing a connection between your SSH client and the module, refer to the Quectel AT Command Guide to complete the initial configuration.
To test the satellite connectivity the CC660D-LS module provides, use the following AT commands.
CC660D-LS only supports NTN (that is, NBNTN), so there’s no radio access technology (RAT) selection available.
For more information about using AT commands to configure devices, see emnify’s Introduction to AT commands webinar.
Set the Access Point Name (APN) to em:
Query the current APN:
See available bands:
Get the currently active bands:
Skylo uses bands 255 and 256. Setting both frequencies is safe, but this slows down the network search and attachment time.
To save time, only configure one band. Currently, 255 is used in North America and 256 in Europe. Choose the band that corresponds to your region.
Replace STATUS with an integer that indicates whether the embedded microcontroller unit (MCU) needs to provide GNSS information.
The following example command indicates that the MCU needs to provide GNSS information:
The MCU uses this command to actively set and query the terminal’s current GNSS position information. The module uses the inputted GNSS position information for satellite communication timing and frequency compensation.
When the module needs GNSS position information, it actively reports the unsolicited result code (URC) +QGNSSINFO: 1 to notify the MCU to input GNSS position information to the module.
Replace the placeholders according to your GNSS information using the following table as a reference.
The following example command sets the GNSS information to the emnify office on the nineteenth floor in Berlin, Germany:
90198 is the Skylo network code.
You’re ready to attach to an NTN network if you see it in your response.
Typically, the module attaches to the Skylo network quicker automatically (that is, AT+COPS=0).
But for debugging, you can use the preceding command to manually attach to the Skylo network.
As a result, you should see a reported CEREG state change.
The following table outlines the possible values.
This command is used in engineering mode.
There are four available modes to pass to this command:
The response contains the following values:
Skylo NTN doesn’t support Transmission Control Protocol (TCP) connections.
Creates an IPv4 UDP/IPv4 socket. The modem’s response establishes the socket ID so it can be used to send or receive IP data over UDP.
Replace SOCKET_ID with the integer response from the preceding +ESOC command, REMOTE_PORT with the remote listener port, and REMOTE_ADDRESS with the IPv4 address of the remote server.
Replace SOCKET_ID with the integer response from the preceding +ESOC command, DATA_LEN with the length of the data you’re sending in bytes, and DATA with the data you’re sending encoded as hex digits.
The following example command sends “text message” to the remote server. The response in ASCII read: “9999test message0000”
Replace SOCKET_ID with the integer response from the preceding +ESOC command.
The following example command closes the socket with ID 1:
