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CC3000 AP scan results missing APs

Andy8086940
Intellectual 620 points

I am using the basic WIFI example with added commands to set the scan params and get the scan results, but I seem to always get fewer results than I expect.  When I do a scan with my phone I routinely see 8 APs nearby, but the CC3000 scan routinely has only 4-7 of them in any given set of results. Sometimes the results change, but there are always fewer than what actually exist (as if it randomly misses APs during each scan). I have used the default parameters of wlan_ioctl_set_scan_params(1, 20, 30, 2, 0x7FF, -100, 0, 205, intervals) and have tried increasing the dwell times to 200/300 and 2000/3000 as well as the increasing the number of probe responses to 10 with no apparent difference.

It's most likely not a signal strength issue as one of the APs is sitting right next to the module but it still is missing sometimes.

Any suggestions?

Thanks,

Andy

  • 0
    TI__Mastermind 18455 points

     

    Hi Andy,

    Number of scan results is very dependent on the RF conditions in your environment and also sometimes on the AP being used.
    Meaning some AP are slow to answer probe requests.

    Are you able to provide a sniffer capture of your environment?
    Are you able to notice if specific AP's are the ones that are usually missed?
    Can you please described the AP's used and their configuration, mainly which channel are they set to?

    Thanks,
    Alon.S