Wifi Triangulation

You can’t use the GPS technique because the timing is nothing like accurate enough. The best you can do is Trilateration based on the signal strength from each base station and assume that range is proportional to signal. You will probably need to force a connection to each base station in turn in order to … Read more

How to convert Wifi signal strength from Quality (percent) to RSSI (dBm)?

Wifi Signal Strength Percentage to RSSI dBm Microsoft defines Wifi signal quality in their WLAN_ASSOCIATION_ATTRIBUTES structure as follows: wlanSignalQuality: A percentage value that represents the signal quality of the network. WLAN_SIGNAL_QUALITY is of type ULONG. This member contains a value between 0 and 100. A value of 0 implies an actual RSSI signal strength of … Read more

Why is the WPA2-PSK key length limited to 63 characters?

The PSK is derived from the passphrase using PBKDF2 key derivation function with SHA1 as the pseudo random function. The passphrase is an 8-63 character ASCII encoded string. PSK = PBKDF2(PassPhrase, ssid, ssidLength, 4096, 256) The PSK is 32 bytes (256 bits), often displayed as 64 hex characters. According to the 802.11i specification: A pass-phrase … Read more

use “netsh wlan set hostednetwork …” to create a wifi hotspot and the authentication can’t work correctly

Use these commands on a windows command prompt(cmd) with administrator privilege (run as administrator): netsh wlan set hostednetwork mode=allow ssid=tests key=tests123 netsh wlan start hostednetwork Then you go to Network and sharing center and click on “change adapter settings” (I’m using windows 7, it can be a little different on windows 8) Then right click … Read more

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