SC66 Wi-Fi Strength and Performance Issue

IoT Modules Smart Module
1

We are experiencing significantly low RSSI values and poor Wi-Fi performance on our SC66 modules, even at close proximity (1 meter) to the router.

Observations:

  1. RSSI Values:
  • The RSSI values on the SC66 module are extremely low even at a 1-meter distance from the router.
  • Comparison with other devices shows that the SC66 has a much weaker signal strength under the same conditions.
  1. Internet Speed Test:
  • We conducted internet speed tests on two SC66 boards placed near the Wi-Fi router.
  • Comparative tests were also performed on a normal smartphone under the same conditions.
  • The SC66 boards consistently showed much lower speeds compared to the smartphone.

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Screenshot_2024-05-31-10-29-08-64_40deb401b9ffe8e1df2f1cc5ba480b12
Screenshot_2024-05-31-10-29-08-64_40deb401b9ffe8e1df2f1cc5ba480b12738×1600 61 KB

Thank you for your attention to this matter. We look forward to your guidance on resolving this issue.

2

Some more updates on this issue
we are using SC66 -ENB modules. which consists of wifi 802.11a/b/g/h

additionally we have performed some more test on wifi

Observations:

  1. RSSI Values:
  • The RSSI values on the SC66 module are extremely low even at a 1 meter distance from the router and it is -87 and some times -90 and -93(varies from -80 to -95).
    and at 3 meters the RSSI is -127

  1. we run "adb shell dumpsys wifi | grep “mNetworkInfo” " command
    Couldn’t attach file to forum but spoted some warnings.

    1. [ 20.352494] cnss_utils: WLAN MAC address is not set, type 0
      [ 20.368298] [kworke][472233051][17:28:50.642037] wlan: [475:I:HDD]
      hdd_initialize_mac_address: 11334: using default MAC address

    2. [ 20.660271] [wifi@1][477838959][17:28:50.934011] wlan: [2423:E:WMA]
      wma_chan_phy_mode : Invalid channel width

Thank you for your attention to this matter. We look forward to your guidance on resolving this issue.

3

Hi,
Do you test on your own designed board?

4

Yes we are testing it on our own board