Topic: Intermittent wifi - sign of impending PSU failure?

One of my C1s has started to fall off the net and I just see the chumby-clock.  This mostly happens when the weather is warm.  During the evening/overnight when things cool down then it starts to display my widgets again.

Is this a sign of impending PSU failure?  Or some other hardware issue?

Re: Intermittent wifi - sign of impending PSU failure?

It's doubtful that it's the PSU, since it would be more likely to power off the device.  It may be some thermal sensitivity with the network adapter.  When it's in the in this state, do you get a valid MAC in the network setup wizard?

Re: Intermittent wifi - sign of impending PSU failure?

Next time it breaks (it's working OK at this second!) I'll check :-)

FWIW, the C1 currently reports a signal of -68dBm (60% quality) so it's not the _strongest_ signal in the world, but should be strong enough :-)

Re: Intermittent wifi - sign of impending PSU failure?

Interesting...  I did a "dmesg" on it and I see it keeps losing association and re-associating.

eg

[1124227.330000] wlan0: associated
[1124230.530000] wlan0: deauthenticated from c2d1e02c (Reason: 2)
[1124232.020000] wlan0: direct probe to AP c2d1e02c (try 1)
[1124232.030000] wlan0: direct probe responded
[1124232.030000] wlan0: authenticate with AP c2d1e02c (try 1)
[1124232.050000] wlan0: authenticated

"Reason 2" means "Previous authentication no longer valid" ( https://www.aboutcher.co.uk/2012/07/lin … son-codes/ ).

This is happening very often; e.g.

[1124222.500000] wlan0: associated
[1124227.330000] wlan0: associated
[1124232.070000] wlan0: associated
[1124250.500000] wlan0: associated
[1124285.150000] wlan0: associated
[1124301.330000] wlan0: associated
[1130207.100000] wlan0: associated

My other C1 only shows 3 of these messages (at bootup, at 17 days, at 28 days.. which could be when I rebooted the router).

I'm gonna reboot the dodgy C1, just in case there's something odd happening in the kernel preventing it from keeping the connection alive.

Re: Intermittent wifi - sign of impending PSU failure?

If you've got a multimeter, I'd go ahead and stick a couple pins into the cable, and measure the voltages under load... I just don't trust the c1/i3 power supplies (ALL of mine died, and had to have a capacitor in the get replaced)

Cleaning up any loose bits and bytes.