monitornetsh.py monitors netsh.exe's netsh wlan show interfaces output to show connected WLAN information. It includes the conversion of signal quality to an estimated Received Signal Strength Indicator (RSSI) value.
abandoned
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this script scrapes
netsh- this script completely relies on the output of
netsh wlan show interfaces.
- this script completely relies on the output of
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netshdoes not force a scan or a refresh of resultsnetsh wlan ...relies on cached scan results and does not trigger scans.- this means signal quality and calculated RSSI will be delayed until some event triggers a scan.
- for example, you can manually force a refresh of scan results by clicking on the Wi-Fi network icon in the toolbar.
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rssi calculated in this way will never be greater than -50
- the signal quality metric found in the output is a qualitative metric.
- this script uses linear interpolation to convert signal quality to RSSI, thus an arbitrary metric.
with that said, the conversion for signal quality (percentage) to RSSI (dBm) is based on how wlanSignalQuality is calculated from wlanapi.h.
A percentage value that represents the signal quality of the network.
WLAN_SIGNAL_QUALITYis of type ULONG. This member contains a value between 0 and 100. A value of 0 implies an actual RSSI signal strength of -100 dbm. A value of 100 implies an actual RSSI signal strength of -50 dbm. You can calculate the RSSI signal strength value for wlanSignalQuality values between 1 and 99 using linear interpolation.
here is the pseudo code for how this script calculates RSSI from signal quality:
// signal quality to RSSI
if(quality <= 0)
rssi = -100;
else if(quality >= 100)
rssi = -50;
else
rssi = (quality / 2) - 100;
this pseudo code shows this script cannot calculate RSSI better than -50. for this reason, and the known issues, this script is likely not what you want to use.
you may be looking for a RSSI value reported by the driver such as available from the wlanapi.
if you are after the RSSI value reported by the driver, consider using WinFi by Helge Keck.
a microsoft windows machine with Python v3.0+ installed.
tested with Python 3.6.4 and Windows 10 Enterprise (10.0.16299 N/A Build 16299).
by default the script will poll netsh.exe every second. use the --interval argument to change this.
script will create subfolder in the current directory called log where you will find rotating log files.
>monitornetsh.py
netsh.exe polling interval: 1
interface name, mac, ssid, bssid, radio, auth, cipher, channel, receive, transmit, quality, rssi
[20181217t085334]:Internal WLAN NIC, 28:c6:3f:XX:XX:XX, eap, f0:5c:19:XX:XX:XX, WPA2-Enterprise, CCMP, 802.11n, 157, 300, 300, 99, -50
project license can be found here.