check whether network/password authenticate and whether the Tessel connects

[Frijol]

Currently t2 wifi sets credentials in a file, but it doesn't do anything to check whether the network/password authenticate or connection is successful.

moved from #82

[Frijol]

I'll take a stab at this

[Frijol]

Relevant docs:

• WPI CLI docs
• WPA supplicant
• netifd
• ubus

[Frijol]

dterm'd into T2, in a ubus listen:

giving it the creds for a network that doesn't exist (after it was on a network):

[ 1051.420000] wlan0: deauthenticating from e8:33:81:cc:5f:e0 by local choice (Reason: 3=DEAUTH_LEAVING)
{ "network.interface": {"action":"ifdown","interface":"wifi"} }
[ 1051.940000] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready

giving it the right creds:

[ 1073.360000] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 1074.990000] wlan0: authenticate with e8:33:81:cc:5f:e0
[ 1075.020000] wlan0: send auth to e8:33:81:cc:5f:e0 (try 1/3)
[ 1075.020000] wlan0: authenticated
[ 1075.040000] wlan0: associate with e8:33:81:cc:5f:e0 (try 1/3)
[ 1075.050000] wlan0: RX AssocResp from e8:33:81:cc:5f:e0 (capab=0x411 status=0 aid=19)
[ 1075.060000] wlan0: associated
[ 1075.060000] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
{ "network.interface": {"action":"ifup","interface":"wifi"} }

(it's not always this clean, sometimes you get deauthentication events and reauthentications mixed in)

giving it a real network but the wrong password:

[ 1204.570000] wlan0: deauthenticating from e8:33:81:cc:5f:e0 by local choice (Reason: 3=DEAUTH_LEAVING)
{ "network.interface": {"action":"ifdown","interface":"wifi"} }
[ 1205.090000] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready

[Frijol]

no such network & real network but wrong password have the same output, so this does not produce a complete solution.

However, we could do a quick & dirty listen for "ifup" within a certain timeframe after setting credentials to determine if the network is providing a connection.

[Frijol]

Instead of listening for "ifup", wouldn't it be better to just run/output t2 wifi after setting credentials? This gives the user more information about the connection & doesn't duplicate code functionality.

[johnnyman727]

@Frijol I think the question is how long to wait after setting credentials. For example, if a wifi signal is relatively weak, the connection may not happen on the first or second attempt but maybe the third.