Common Troubleshooting

Depending on the problems users may encounter when using the device, some basic troubleshooting methods are provided here.

LED Status

There are several LEDs on the side of Web-888. Currently, D0 turns on when Linux Kernel is fully loaded. D2 flashes when web server is up running. Other LEDs will be used for other status report in the future.

After powering on and successfully booting the system from the TF card, the D2 green LED will turn off. If the D2 green LED remains on after powering up, it indicates that the system on the TF card did not boot properly. Please reformat the TF card (FAT32 format is recommended) and copy the firmware back to the root directory.

Once the system loads successfully, the D0 blue LED will light up, and the D2 green LED will flash intermittently.

Unable to Connect

Description: The router can see the hostname of the Web-888 SDR (web-888.local) in the background, but when accessing the corresponding IP, it prompts that the connection is denied or the connection timeout.

Possible Cause:

First boot of the system, slightly slow
TF-card is using Image tool to write Zip Package (which is incorrect)
TF-card has additional layer of folder, verify the folder content
TF-card corruption
Insufficient power supply current
The router hadn't updated the DHCP client list instantly after rebooting Web-888 SDR

Solution:

Wait for a while and then visit again
Go to Downloads to download and copy the latest firmware content into card
Replace the TF card with a Class 10 card with a capacity of 200MB or more
Use a power supply with a higher full load current (at least 2A)
Access the Web-888 SDR directly using the hostname or reboot the router

Device Drops Out

Description: The device drops out for no apparent reason after a period of operation and needs to be re-powered before it returns to normal.

Possible Cause:

Insufficient power supply current
Aging of the power cable
Poor contact with the power socket

Solution:

Use a power supply with a higher full load current (at least 2A)
Replace with a good quality USB Type-C power cable
Replace the power socket

Very Slow Webpage Loading

Description: After several quick refreshes of the Web-888 SDR webpage, the webpage loading speed suddenly becomes extremely slow.

Possible Cause:

You are being rate limited

Solution:

Close the current tab and wait a few seconds before revisiting

Can't Receive GPS Signal

Description: The Web-888 SDR is connected to the GPS antenna, but still cannot locate and calibrate the frequency.

Possible Cause:

GPS antenna is damaged.
Web-888 SDR uses Navstar, QZSS, Galileo satellites for positioning and the signal is weak
GPS antenna is passive antenna. Replace with an active one.

Solution:

Replace the GPS antenna
Place the GPS antenna in an open area

Intermittent Bursts of Sound

Description: Intermittent bursts of sound when receiving certain stations.

Possible Cause:

Short signal overload due to fluctuating signals from shortwave stations
AGC-related options are incorrectly set

Solution:

Enable the Synchronous Aperture Detection (SAM) function on the dashboard or connect the antenna to HF-1 interface
Adjust the AGC-related options in the dashboard until no popping occurs

Spectrogram is Black

Description: The webpage opens, but the spectrum graph is black and there is no sound, and the Status tab in the dashboard does not output statistics.

Possible Cause:

External ADC clock is mistakenly enabled
Web-888 SDR failed to initialize the FPGA
The FPGA chip has been damaged

Solution:

Set External ADC clock to No in the Connect tab in the administration
Try to reboot the device by unplugging the power supply
Contact the dealer for repair of the Web-888 SDR