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如何找出 WiFi 灵敏度 (RSSI)

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如何找出 WiFi 灵敏度 (RSSI)

我希望能够得到接收信号强度指示从我的计算机的 wifi 接口，理想情况下表示为分贝。

本文解释了我所追求的。

答案1

iwlist和是无线工具的一部分iwconfig，现已弃用。

您可以列出您的设备iw dev

使用 WiFi 站时，您可以获取当前链接的 RSSI 值，如下所示（wlan0 是通常的默认 Wi-Fi 设备，但取决于驱动程序和配置）：

$ iw dev wlan0 link
Connected to 9c:4e:20:c8:ee:9e (on wlan0)
    SSID: CORP1
    freq: 5240
    RX: 7306266 bytes (6124 packets)
    TX: 776491 bytes (4117 packets)
    signal: -75 dBm
    tx bitrate: 39.0 MBit/s MCS 4

列出可用的 WiFi 信号：

$ ip link set wlan0 up
$ iw dev wlan0 scan
...
BSS 9c:4e:20:c8:ee:9d(on wlan0)
TSF: 0 usec (0d, 00:00:00)
freq: 5240
beacon interval: 102 TUs
capability: ESS Privacy RadioMeasure (0x1011)
signal: -75.00 dBm
last seen: 765 ms ago
SSID: CORP1
...

答案2

您可以使用 2 个命令来获取 RSSI 值。

您可以先cat /proc/net/wireless在那里提交并获取结果。这两种方法中使用的资源最少

$ /bin/cat /proc/net/wireless

Inter-| sta-|   Quality        |   Discarded packets               | Missed | WE
 face | tus | link level noise |  nwid  crypt   frag  retry   misc | beacon | 22

wlo1: 0000   70.  -31.  -256        0      0      0      0     25        0

另一种选择是使用iwconfig/iwlist（我的无线接口是wlo1，因此替换为适当的接口名称）

$ /sbin/iwconfig wlo1
wlo1      IEEE 802.11  ESSID:"COD PUBLIC WIRELESS"
          Mode:Managed  Frequency:5.745 GHz  Access Point: 40:E3:D6:63:BC:B0
          Bit Rate=866.7 Mb/s   Tx-Power=22 dBm
          Retry short limit:7   RTS thr:off   Fragment thr:off<br>
          Power Management:on
          Link Quality=67/70  Signal level=-43 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:27   Missed beacon:0



$ iwlist wlo1 scanning

wlo1      Scan completed :
          Cell 01 - Address: 40:E3:D6:63:BC:B0
                    Channel:149
                    Frequency:5.745 GHz
                    Quality=70/70  Signal level=-38 dBm
                    Encryption key:off
                    ESSID:"COD PUBLIC WIRELESS"
                    Bit Rates:12 Mb/s; 24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=00000075dccaa121
                    Extra: Last beacon: 81624ms ago
                    IE: Unknown: 0013434F44205055424C494320574952454C455353
                    IE: Unknown: 010598B048606C
                    IE: Unknown: 030195
                    IE: Unknown: 2D1AEF091BFFFFFFFF00000000000000000000000000000000000000
                    IE: Unknown: 3D1695050400000000000000000000000000000000000000
                    IE: Unknown: 4A0E14000A002C01C800140005001900
                    IE: Unknown: 7F080100080000000040
                    IE: Unknown: BF0CB1798B33AAFF0000AAFF0000
                    IE: Unknown: C005019B000000
                    IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00

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