Preparing the QE3 Communication Link

The following instructions use QGroundControl as the ground station and explain how to configure the LQ-10 data link modules between the UAV and remote controller for a one-controller-to-one-device scenario.

Tip

Before configuration, ensure that all cables are connected correctly. Follow the official LQ-10 manual for the definitive procedure.

The default configuration is completed at the factory: the remote controller IP address is 192.168.144.201, and the UAV IP address is 192.168.144.202. The instructions below guide users through a custom configuration.

1. Configure the QE3 Remote Controller

1.1 Ethernet Configuration

Configure the remote controller's Ethernet settings as shown below.

2. Configure the Station Unit (Data Link Built into the Remote Controller)

Configure the network and wireless parameters. The local IP address is 192.168.1.201.

Tip

The default factory IP address of the LQ is 192.168.1.201. Restoring factory settings also resets the device to this address. For detailed instructions, refer to the LQ-10 Data Link Module User Manual.

Configure the SBUS serial parameters to send SBUS data to the remote target—the LQ-10 data link module on the UAV. Set the target IP address to 192.168.1.202 and the port to 2022.

Configure the bandwidth and rate. Both endpoints must use the same operating mode: either both must use broadband mode or both must use narrowband mode. Otherwise, the LQ-10 units cannot pair.

3. Configure the UAV-Side Data Link Module

1. Connect the Ethernet cable from the LQ-10 AP endpoint to the included adapter, then connect the Ethernet cable to the computer's Ethernet port.

2. Connect the included LQ-10 power cable to the power input and set the supply voltage to 9–15 V.

Tip

The module can also be powered through the Type-C port.

3. Set the local IP address to 192.168.1.123, subnet mask to 255.255.255.0, and gateway to 192.168.1.1.

4. Configure the network and wireless parameters, and set the data link module IP address to 192.168.1.202.

Tip

The wireless name and password must match the AP configuration of the remote controller's data link module.

5. Configure the SBUS serial parameters. The UAV-side LQ-10 data link module is the receiving endpoint and must be set to listening mode. Listen on the local IP address 192.168.1.202 and port 2022.

Tip

This configuration listens for SBUS data sent to the remote controller's UDP port and forwards it to the flight controller through the SBUS serial port.

6. Configure serial data.

   For example, send flight controller serial data through serial port 2 to the remote target (the remote controller). Both endpoints must use the same baud rate. This example uses a baud rate of 57600, a remote controller IP address of 192.168.1.123, and port 2021. Listen on this port in the software to obtain the data.

7. QGC can forward flight controller data through a UDP port and establish a UDP connection.

Tip

Ensure that the connected device's Ethernet settings place it on the same subnet as the LQ-10.

8. Configure the bandwidth and rate.

Tip

The operating mode must match the remote controller endpoint, or the units cannot pair.

Tip

The network IP configuration above is for reference only. Adjust it according to actual requirements. If you change the LQ-10 subnet, also change the subnets of all devices across the link, including the onboard computer, LiDAR, and gimbal, and prevent IP address conflicts between devices.

Note

In the serial configuration, select "Remote Target" on the sending endpoint and "Local Listening" on the receiving endpoint. Both endpoints must use the same baud rate. After enabling the corresponding serial port, add a forwarding rule.

Note

Both endpoints must use the same operating mode: either both must use broadband mode or both must use narrowband mode. Otherwise, pairing will fail.

4. Determine Whether the One-to-One Devices Are Connected Successfully

4.1 Check the Indicator

The LQ-10 has an RSSI indicator on its enclosure. A steady blue indicator means that the devices are connected successfully; a flashing red indicator means that the devices are not yet connected.

4.2 Check the Web Interface

• Enter the device IP address in a PC browser (example: 192.168.1.2). Click "Device Status" in the navigation bar on the left to open the network settings page, then check whether the peer device's IP address and online information are displayed.

• You can also open the other device's management page directly (example: 192.168.1.3).

4.3 Check with the Ping Command

Use the ping command on the computer to test the other device. If the ping succeeds, the two devices are connected successfully.

5. Upgrade the LQ-10 Firmware

LQ-10 firmware v1.1.0 may limit the MTU used for gimbal video streaming. When the gimbal MTU is set to 1500, the video stream may be unavailable. Use the following entry point to upgrade the LQ-10 firmware.

If you use a GX40 gimbal, view and set the MTU at the following addresses.

View the MTU: http://192.168.144.108/cgi-bin/configManager.cgi?action=getConfig&name=Network

Set the MTU: http://192.168.144.108/cgi-bin/configManager.cgi?action=setConfig&Network.eth0.MTU=1400

In the links above, 192.168.144.108 is the GX40 gimbal IP address. Use the actual address. After opening the page, enter username user and password 0000.

Note

Upgrading restores the default configuration: the module IP address resets to 192.168.1.201, and all other settings are also reset. Export the configuration before upgrading. For details, refer to LQ-10 Data Link Module User Manual: Importing and Exporting Configurations.

For firmware upgrade details, refer to LQ-10 Data Link Module User Manual: Firmware Upgrade and Recovery.

• Download Firmware