My WiFi is sometimes fine and sometimes very bad. Holding the laptop right next to the access point makes no difference. I'm in a building where I have to share the AP with multiple people (we don't get a wired connection to our apartment...). It seems that either the uplink is saturated, or someone else is using all the available spectrum.
Can I use my laptop to check whether the spectrum is saturated? In the past I've loaned a HackRF from someone, which made it easy to see using tools like
sdrangelove. Is there any tool that can use my WiFi card to do the same kind of analysis?
One option is to put the card in monitor mode using
airmon-ng, but as far as I know, that would only show me packets from people authenticated with the same AP. I'd also like to see interference from people not on the same AP.
Another tool I know of is
wavemon, but it does not seem to be able to show what I am looking for.
Is there any software for Linux that can do this? Anything packaged for Debian Stretch would be ideal.