Network and Communication Settings - System Settings

This section describes the basic methods for configuring Ethernet and Wi-Fi in Android system settings, and provides recommended practices for communication parameters and security. This product does not support 4G/5G cellular mobile communication. Do not attempt to activate a mobile network through the SIM card slot. These network-related options are not configured in the Remote Assistant app. Instead, open the corresponding pages through the system Settings app.

Ethernet Settings

Default Configuration (Example)

• Default static IP: 192.168.1.123
• Subnet mask: 255.255.255.0
• Gateway address: 192.168.1.1
• Connection method: Automatically connects after an Ethernet cable is plugged in

Basic Operations

1. Use an Ethernet cable to connect the QE3 Ethernet port to a switch or router;
2. Go to Settings > Network & internet > Ethernet > Ethernet configuration to view the current IP address;
3. To switch to DHCP or change the static IP address, gateway, or DNS, configure and save the settings on the same screen.

After configuration, you can access services on the QE3 over the LAN, such as debugging interfaces and the task management backend. The specific ports depend on the upper-layer software.

Wi-Fi Settings

Connecting to a Wireless Network

1. Go to Settings > Network & internet > Internet, and turn on the WLAN toggle;
2. Select the target SSID from the scan results;
3. Enter the password and confirm the connection;
4. After the connection is established, the status bar displays the network icon and signal strength.

Managing Saved Networks

• You can view and delete saved Wi-Fi configurations;
• You can enable Auto-connect to connect automatically when the network is in range;

On some systems, you can also use Network preferences to configure options such as whether to receive a notification when a high-quality public network is nearby and whether to turn WLAN back on automatically:

Communication Parameters and Frequency Bands

The specific available frequency bands and channels depend on the supplied data link/communication module. The current system Settings do not provide options for selecting communication parameters or frequency bands. To adjust the frequency band, channel, or transmit power of the data link/communication module, use the configuration tool specified for the data link module. For detailed operations, refer to the supplied delivery instructions.

The signal strength indicator and alerts on the home screen can help you assess the current link quality. In complex electromagnetic environments, it is recommended that you evaluate interference in advance and confirm the appropriate frequency band and power configuration with technical support.

USB Connection Use Cases

When the device is connected to a PC through Type-C, go to Settings > Connected devices, turn off USB Host Mode, and then open USB to access the USB preferences screen, where you can select modes such as File transfer and USB tethering.
The design principle of the QE3 is as follows: The Type-C port is primarily used for power input and supports USB-PD fast charging, while also supporting file transfers with a PC; the USB-A port is used for data transmission and peripheral connections.

USB Host Mode and PC Connection (Host Mode)

The Type-C port is in USB Host Mode (Host) by default and is used to charge the remote controller;

To switch to data interaction with a PC through USB-C, follow the steps below (using a typical interface as an example):

1. Go to Settings > Connected devices. Tap Connected devices to see USB Host Mode. This option is enabled by default, at which point the device is in Host Mode;
   
2. When the device needs to interact with a PC through a data cable, turn off USB Host Mode. The device then displays the warning shown in the pop-up window. After you confirm, USB Host Mode is completely disabled;
   
3. Tap Cancel to withdraw the current operation without making any changes. (Turning off USB Host Mode disconnects Ethernet and the serial port. Proceed according to the actual situation to avoid unnecessary losses.);
4. After USB Host Mode is successfully turned off, connect the Type-C port to the PC and wait for USB to appear below the options. You can then configure the functions of the USB connection to the PC according to your preferences.

Note: The Remote Assistant app will not be available after USB Host Mode is turned off on the remote controller.

Tip: Turning off USB Host Mode disconnects the Ethernet and serial links that currently rely on the USB-C bus. It is recommended that you perform this operation when no task is running or in a debugging environment to avoid interrupting ongoing task communications.

Developer Options and ADB Debugging (Advanced)

Advanced users who need to perform system-level debugging or log collection through adb can enable Developer options and ADB debugging as follows:

1. Go to Settings > About device;
2. Scroll to the bottom of the page and tap Build number 7 consecutive times. The system displays the message You are now in developer mode;
3. Return to the previous level, then find and open Developer options in the System menu;
4. Turn on USB debugging under Developer options and confirm authorization as prompted if necessary.

Wired ADB Debugging

1. Use a data cable to connect the QE3 Type-C port to the PC, and wait for the system to display an authorization dialog such as Allow USB debugging?;
2. After selecting Allow on the device, you can see the QE3 in the PC's adb devices list;
3. If the authorization dialog does not appear or the connection cannot be established, first check whether the data cable and USB port are working properly, and replace the cable if necessary.

Wireless ADB Debugging

1. Ensure that the QE3 and the debugging PC are connected to the same LAN, such as the same Wi-Fi or wired network;
2. Turn on Wireless debugging in Developer options and select Allow in the dialog that appears;
3. Open the Wireless debugging details page to view the current device's IP address and port number;
4. On the PC, execute adb connect using the IP address and port shown on the screen to establish a wireless debugging connection;
5. If no debugging commands are sent for an extended period, the connection may be automatically disconnected due to power-saving policies. Reconnect as needed.

Note: ADB debugging is intended only for development and operations personnel. General users do not need to enable it. Enabling USB or wireless debugging may introduce additional security risks. It is recommended that you use these features in a controlled network environment and turn off the relevant toggles after debugging is complete.

Network Priority

• The system generally prioritizes wired networks, followed by Wi-Fi;
• You can view the currently active link in the network settings;

Before deployment in a production environment, it is recommended that you plan the overall network architecture according to the principle of prioritizing wired networks and using Wi-Fi as a fallback, ensuring a stable and reliable connection during tasks.

Network Reset Options (For Troubleshooting Only)

Go to Settings > System > Reset options to reset configurations such as Bluetooth and WLAN, restoring a clean state after configuration errors or extended testing:

• Reset Bluetooth and WLAN: Clears paired Bluetooth devices and saved Wi-Fi networks;
• Erase all data (factory reset): Erases user data and configurations. Users are not advised to perform this operation themselves.

Note: The system menu may still display generic Android items such as Reset mobile network settings, but this device does not support cellular/mobile networks. This option has no practical effect on this product and must not be interpreted as indicating support for SIM-based Internet access.

Tip: “Erase all data (factory reset)” erases all user data. Perform this operation only under the guidance of operations personnel or technical support.