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UVC Cameras Issue With Mt7628/Mt7688 Wifi Module

After the camera is connected, power on the module. After the module is started, click "Apply" on the camera interface on the web interface. For details on the web interface operation, please refer to the document "HCR28AN web page configuration instruction_V2.01.pdf" ;

If you still cannot access the video after following the above instructions, log in to the management terminal through telnet;

 (1) First check whether the hardware is connected to OK, you can log in to the management terminal through the debug serial port or remote management protocol (MTK: telnet; Qualcomm: ssh), and use dmesg -c to check the output of the corresponding log log when the usb camera is plugged and unplugged. ;If the log is normal, use ls /dev/video* to see if there is a corresponding device, if there is, it is normal;

 (2) The hardware is normal, use ps to view the running program, the program name may be different according to the firmware version, but there are only three possible, web viewing video stream: mjpg-streamer/uvc-stream; push stream scheme: ffmpeg;

(3) If the relevant programs are running normally and there is still no video, it is also normal to check the network. You can send the PS screenshot of the above investigation to the engineer to assist in the investigation;

Detailed supplementary instructions:

  1. Use ps to check whether the program is started;

The firmware that supports 2 million pixels is the mjpg_streamer program;

  1. If there is no uvc_stream program (or mjpg_streamer) in the command after ps, try to start it manually;

The command is:

uvc_stream -r 640x480 -f 30 -p 8080 -d /dev/video0


mjpg_streamer --input "input_uvc.so --device /dev/video0 --fps 25 --resolution 640x480" --output "output_http.so --www /www/webcam --port 8080"

If it is abnormal after typing the command, the program will quit running directly, if it is running normally, it will not quit execution.

Troubleshoot The Problem Of Wifi Module 4g Internet Access

1. Connect to the WIFI hotspot of the corresponding module, and use telnet to enter the management interface.

 2. Use ls /dev/ttyUSB* to check whether the 4G module is connected properly. If it is the following situation, the 4G module is not connected properly.

3. In one terminal window, type cat /dev/ttyUSB2 and press Enter; in the other, type the corresponding AT command, such as:

echo -e ”at\r\n” > /dev/ttyUSB2 //Check whether the at command can be returned correctly;

echo -e ”at+cpin?\r\n” > /dev/ttyUSB2 //Check whether the card is inserted

echo -e "at+csq\r\n" > /dev/ttyUSB2 //Check signal strength

If you use the gateway version 2.0, you can use it by opening only one terminal:

atcmd /dev/ttyUSB2 115200 at to query


Modify The Gateway Server Ip And Port

1. Modify The Gateway Server Ip And Port

a. The PC is directly connected to the WIFI hotspot of the gateway;

b. PC access gateway WIFI through telnet:23 protocol

  1. Execute on the telnet interactive terminal and execute the following commands to modify the IP and Port;

View all default parameters of the system and find the storage key corresponding to the server;

cat /etc_ro/Wireless/RT2860AP/RT2860_default_vlan

Set the server IP and Port, view the server IP and Port.

nvram_set UDPServerIP

nvram_set UDPServerPort 8888

nvram_get UDPServerIP

nvram_get UDPServerPort


Restart the program to make the configuration take effect;



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