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I'm using my Raspberry Pi to measure the signal strength of WIFI devices. I have tried with iwspy command but it shows me

error as follows

wlan0 Inteface doesn't support wireless statics collection.
  • please post your lsusb -v output - and I'll be able to help you further =) – Alexey Vesnin Feb 11 '16 at 15:21
  • No all wlan adapters implement or expose the API for "collection" - You have to try another one or find one that others suggest. Intel based usually do it all, and many realtek and ralink. – Piotr Kula Feb 11 '16 at 23:17
  • @AlexeyVesnin I have a very long result I give you an ewample of Bus 001 Device 002: ID 0424: 9514 Standard Microsystems Corps. Coudn't open device, some information will be missing Device descriptor: bLength 18 bDescriptorTupe 1 bcdUSB 2.00 bDescriptorClass 9 Hub bDevicreSubClass 0 Unused bDeviceProtocol 2 TT per port – Cyrine Nasri Feb 12 '16 at 13:03
  • @CyrineNasri try to use pastebin for long results - it's a proper way to give a full details – Alexey Vesnin Feb 12 '16 at 13:10
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It seems that your Interface doesn't support wireless statics collection... Maybe another wifi device does support this.

Otherwise I think I'll have to disappoint you, Google told me mac80211 support has been phased out in the tool you are using. Link here.

you could try iwconfig, this reports QOL and signal strength.

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