4

there is no feature to measure the RSSI between peers in Wifi-direct, so how to get RSSI between them.

actually i go under API for WIFI to see how they measure WIFI RSSI So i see that they send Command as parameter to native method, but i can't catch this command!!!

in this method wifi_send_command in wifi.c from this link.

as i know Android is under linux, the iwconfig is linux command to get the wireless information interface, if i used it can i get the Wifi direct information ? or it is just return the access points network information?

anyone have any idea about this ?

2

You can get this information inside wpa_cli. Open wpa_cli in wifi-direct interface and do a scan and scan_results as below.

adb shell wpa_cli -i<wifi-direct interface name> -p<socket path> scan
adb shell wpa_cli -i<wifi-direct interface name> -p<socket path> scan_results

You will get small info about connected peer(device address, channel,rssi etc). Hope this works!

  • can i get rssi between peers ? i mean when peer received message from other peer i need its RSSI strength from it – H.H Mar 5 '13 at 9:29
  • what about this wpa_cli ?? from where can i get it ? – H.H Mar 5 '13 at 9:29
  • also it is for scanning RSSI ? – H.H Mar 5 '13 at 9:29
  • wpa_cli is a command line interface for the wpa_supplicant which you are running in android. It will be in /system/bin by default(i hope so). This is just like scanning peers(not wifi-direct searching) and getting scan results. RSSI will be there in the scan results info. – Rilwan Mar 5 '13 at 9:34
  • when i type wpa_cli wpa_cli: not found ? – H.H Mar 5 '13 at 10:50
0

If you want to measure the RSSI between 2 peers before connection, just try:

  • In linux under wpa_supplicant

    sudo wpa_cli p2p_peer 74:da:3f:58:5c:f0
    

    (where 74:da:3f:58:5c:f0 is the MAC address of the second peer.)

  • In Android, it should be something like this (guessed and untested)

    adb shell wpa_cli -i <wifi-direct interface name> -p <socket path> p2p_peer 74:da:3f:58:5c:f0
    

After that you will get a big string. Then search for the word Level (the RSSI comes in dBm).

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