Author Topic: Was PWMurg down today?  (Read 309 times)

neilmurg

Was PWMurg down today?
« on: August 30, 2020, 02:29:27 pm »
I lost my ability to have a local (LAN) connection to the PWMurg ATOM GRID today, although on physical inspection if was powered and blinking in what looked like the correct manner.
Should I expect an email if it drops out from the rest of the GRID?
In the end I powered down the LAN and the station and repowered that part of the LAN, once it was up and running I powered on the station and it continued as before, and I have now re-acquired access on the LAN.
I didn't investigate whether it was still accessible over the internet via data.'etc'.com while I couldn't get to it via 192...etc. The disconnection wasn't because DHCP had assigned a new IP, it has a persistant IP from the router.
Any comments advice appreciated...
« Last Edit: August 30, 2020, 11:09:10 pm by neilmurg »

Admin

Re: Was PWMurg down today?
« Reply #1 on: September 03, 2020, 09:39:26 pm »
If your router supports mdns you can use
http://ognpaw.local

Thx
Lee

steveu

Re: Was PWMurg down today?
« Reply #2 on: September 03, 2020, 09:55:43 pm »
I didn't investigate whether it was still accessible over the internet via data.'etc'.com while I couldn't get to it via 192...etc. The disconnection wasn't because DHCP had assigned a new IP, it has a persistant IP from the router.

You may not have been able to log into it with 192.xxx.xxx.xx but if it really has a persistent or reserved IP address (usually done by reserving an IP address for a MAC address in the router) then the first thing to do is to ping that address from the PC you remote in from.

prompty thing>ping 192.xxx.xxx.xx (Windows or Linux)

In Linux you'll have to Ctrl-C out of it , as it does the same as ping -f in Windows IIRC.

If you get a ping back, then it's there, but it could be the other programs that have abended.

Reboot...

another useful command if it's a small LAN is arp -a



neilmurg

Re: Was PWMurg down today?
« Reply #3 on: September 03, 2020, 11:39:37 pm »
thanks. As reported I did solve it, but more analysis would have helped...
Lee, yes I use the IP address and https//ognpaw.local, although this (local) seems to take a while to propagate

steveu, I wasn't 'remoting in', I'm on the LAN. I'm confident it does have a fixed IP4 address issued via DHCP
I think the unit was running OK, but my LAN was having a problem, which didn't affect the station, just local connection.
If it happens again I'll do more diagnostics before rebooting.

I am aware of the tunnel (port forwarding) created in the router, and what it's for

I wasn't emailed to say it was down, even when I powered down for 5 minutes. Should I be? (I think I should). I have a timer which turns the system off an 4am (ish). I know that's no longer best practice, but I'm keeping it for now, unless advised otherwise.

Admin

Re: Was PWMurg down today?
« Reply #4 on: September 04, 2020, 07:47:54 am »
Quote
I wasn't emailed to say it was down, even when I powered down for 5 minutes. Should I be? (I think I should). I have a timer which turns the system off an 4am (ish). I know that's no longer best practice, but I'm keeping it for now, unless advised otherwise.
Hi Neil
We do have the infrastructure to implement this, but have not done so (yet)
There are a number of stations explicitly setup to power down overnight
So this could be annoying for some maintainers
Thx
Lee

steveu

Re: Was PWMurg down today?
« Reply #5 on: September 04, 2020, 08:31:49 am »
steveu, I wasn't 'remoting in', I'm on the LAN. I'm confident it does have a fixed IP4 address issued via DHCP
I think the unit was running OK, but my LAN was having a problem, which didn't affect the station, just local connection.
If it happens again I'll do more diagnostics before rebooting.

I understood that you were on the LAN, as 192.xxx.xxx.xx is a local address only.

By "remoting in" I meant that you were connecting to your ATOM-GRID over a network, unlike mine which has a keyboard and monitor connected directly (HDMI+USB) and can be seen if if the LAN is down.

With mine I'm able to log in directly on the box and run diagnostics.

neilmurg

Re: Was PWMurg down today?
« Reply #6 on: September 07, 2020, 11:33:40 am »
PWMurg stopped again around 23:10 local last night. I couldn't log in locally or via data.p.......com.
I've disconnected the timer just in case that contributed (it shouldn't have).
It's working normally after recycling the power.

exfirepro

Re: Was PWMurg down today?
« Reply #7 on: September 07, 2020, 01:30:52 pm »
Hi Neil,

I had a strange experience with one of mine recently - like yours, still on an electronic timer.

I noticed that the station hadn't restarted one morning and on investigation up in the loft found that the power supply had failed (electronic caps blown in the output stage, so pretty terminal). Swapped in a 'spare' PSU which happened to be constructed 'the opposite way up' - i.e. it had the transformer body and cable exit 'above' the 3 pin plug rather than below it. Checked the timer settings, plugged the new PSU in and powered it up, - all fine, station back online.  :)

Next morning - no station showing again.  :-\  Removed the PSU from the timer and tested it downstairs in a different socket - all OK, so replaced it in the timer - but unit failed to power back up. Was on the brink of changing the RPi, when something told me to re-check the timer - and found that it was indicating 'RND'  ??? . Then noticed that the timer has an 'RND' (Randomiser) button located just under where the 'top' corner of the new PSU sits - and had obviously been pressed as I plugged in the new PSU, and had set up random timer operation, but of course I couldn't see the timer screen because it was hidden behind the PSU... Duh!  ::)

Reset the 'RND' button back to normal and the problem went away. Probably not a'go to' fault, but one to be aware of if running the station on a timer. (I have since changed to another 'down-hanging' PSU to keep the body well away from the timer buttons/screen - 'just in case'.  ;)

Best Regards

Peter
« Last Edit: September 07, 2020, 01:33:33 pm by exfirepro »