WiFi.scanNetworks() dont work

[gerrylenz]

Source
git clone https://github.com/esp8266/Arduino.git esp8266

function
WiFi.scanNetworks();

don't find any networks

[reaper7]

similar problem...
seems that something is wrong, the same example ESP8266WiFi->WiFiScan
sdk 1.3 found 5 AP:

scan start
scan done
5 networks found
1: TP_LINK_ABC (-70) 
2: HP-Print-1e-LaserJet (-83) 
3: NETIASPOT-FF (-89)*
4: NETIASPOT2-FF (-88) 
5: FON_NETIA_ZZZ (-89) 

the same example on latest github version (sdk 1.5):

scan start
scan done
4 networks found
1: HP-Print-1e-LaserJet (-83) 
2: NETIASPOT-FF (-89)*
3: NETIASPOT2-FF (-88) 
4: FON_NETIA_ZZZ (-89) 

it's looking like the latest sdk version (or wifi lib) do not show first network or skips it

[igrr]

Oh, right, I think this was mentioned somewhere. Previously there was a bug
in the SDK, the first node of linked list was always empty. Looks like they
fixed it. Need to update our code as well.

On Thu, Jan 7, 2016, 18:13 reaper7 notifications@github.com wrote:

similar problem...
seems that something is wrong, the same example ESP8266WiFi->WiFiScan
sdk 1.3 found 5 AP:

scan start
scan done
5 networks found
1: TP_LINK_ABC (-70)
2: HP-Print-1e-LaserJet 100 (-83)
3: NETIASPOT-FF (-89)*
4: NETIASPOT2-FF (-88)
5: FON_NETIA_ZZZ (-89)

the same example on latest github version (sdk 1.5):

scan start
scan done
4 networks found
1: HP-Print-1e-LaserJet 100 (-83)
2: NETIASPOT-FF (-89)*
3: NETIASPOT2-FF (-88)
4: FON_NETIA_ZZZ (-89)

it's looking like the latest version sdk or wifi lib do not show first
network or skips it

—
Reply to this email directly or view it on GitHub
#1355 (comment).

[marvinroger]

Yes, I can also confirm this behavior on 2.1.0-rc1.

[tzapu]

this still seems to be the issue with the latest github as well, is that correct?

[tzapu]

is the fix for this just in the example?
i am not adding +1 to the index and some networks, if not all are missing from int n = WiFi.scanNetworks(); ...
and from what users are reporting, if they revert to esp8266 2.0.0 all is good...

[Links2004]

@tzapu I had misunderstand the problem.
but i not finde the skipping of the first result in the source that @igrr noted.

[tzapu]

@Links2004 no problem.

It seems WiFi.scanNetworks(); is not working properly, not finding some or all of networks in latests sdks

I am not sure how to go about replicating it... for instance, i have my own access point that does not appear in the scan, but if i enter ssid and pass manually, it works just fine

cheers

[reaper7]

WiFi.scanNetworks() still do not working properly :(

WifiScan example show 5 networks - do not show(or find?) TP-LINK_XXXXXX network.

But this network are in range because ESP can connect to it (without any problems!) with other examples like WiFiWebServer etc!
As You see, windows machine find TP-LINK_XXXXXX network too, and this is network with strongest signal strength.

look at screenshot:

[Links2004]

@igrr can you fix it?
i not find the offset you noted here:
#1355 (comment)
in our git.

[reaper7]

it looks like first found network are "under index 0"

[igrr]

Looks like the code has changed — I was referring to an older version which I wrote initially.
Will take a look.