CODEWITHSUNDEEP
linuxiwconfig
TeslasPigeons
TeslasPigeons

Reputation: 5

How to get iwconfig to display signal level as dbm instead of a fraction

When I run:

iwconfig wlan0 | grep -i quality

on my Raspberry Pi, with a wifi card installed, it reports back to me with:

Link Quality=99/100 Signal level=48/100 Noise level=0/100

How can I get iwconfig or some other network tool to report the signal level back to me in dBm instead of an arbitrary fraction?

Upvotes: 0

Views: 2491

Answers (1)

user2543740
user2543740

Reputation: 179

It's a matter of the Network Interface Card or of the relatives Drivers. To workaround you can use this simple formula I to do the conversion.

dbm=(fraction_of_total/2)-100

Of course is an approximation and results may vary from chipset to chipset but is how I solved.

You can alternatively find the correct Drivers if you know the wifi card is capable RSSI sampling. But that's usually not easy.

Upvotes: 0

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