Hi Graham, re: Temperature - I looked at graphs of the temperature sensor of a router that's located in the same cabinet as the beaglebone. At the time of the crash - the router temperature sensor was reading 40C (this sensor is inside the router case, so is not indicative of an ambient air temp of 40C)...it actually looks to have been one of the cooler days.
--- Andris Bjornson | EveryLayer <http://www.everylayer.com/> skype: andris.bjornson On Mon, Apr 6, 2015 at 5:58 PM, Graham <[email protected]> wrote: > What is the ambient air temperature the BBB is operating in? > I would measure the temperature of the Sitara chip. > Perhaps it is running on the high side. > There is built in die temperature sensor, although I don't know how easy > it is to read it. > > Either, based on data, or as an experiment, put a heat sink on the Sitara > and/or blow some air over the BBB > > > --- Graham > > == > > > On Monday, April 6, 2015 at 6:30:45 PM UTC-5, Andris Bjornson wrote: >> >> Hi all, >> >> I've deployed a number of Beagle Bone black units in West Africa as part >> of an emergency connectivity relief effort to support NGOs working to fight >> the Ebola outbreak. The beaglebones are providing a simple network >> monitoring function. >> >> The beaglebones were imaged in November with the Ubuntu flasher >> downloaded from here http://elinux.org/BeagleBoardUbuntu#Flasher (The >> version of the image is BBB-eMMC-flasher-ubuntu-14. >> 04.1-console-armhf-2014-10-29-2gb.img) >> >> I'm having an issue with a few of the beaglebones hanging unpredictably, >> and I know I should provide some more information to help diagnose...but >> I'm having a hard time finding any "smoking gun" of what's causing the >> hang. The beaglebones are in remote telco sheds monitoring network >> equipment - so one of my challenges is that I don't have a monitor >> connected or anyone I can ask "whats on the screen." Fortunately I do have >> the ability to power cycle remotely (see below). >> >> Here's what I know: >> >> 1. The beaglebones have not been modified much at all from the >> standard base flasher image. Just a few monitoring tools I've added from >> apt packages (smokeping and zabbix-proxy) I use these tools elsewhere, >> and >> I've never had an issues with them hanging a system. >> 2. The systems run for weeks at a time just fine >> 3. At some point, the systems in question will "hang". They stop >> responding to pings, but the ethernet port of the router they are >> connected >> to still shows a link light. >> 4. Because I have the beaglebone connected to a >> remote manageable power strip / PDU, I am able to power cycle the >> beaglebone when this happens. This causes the unit to boot normally, and >> it functions normally before the problem reoccurs another few weeks later. >> >> >> Each beaglebone is powered by a dedicated 5V / 1A power supply connected >> to its barrel connector. Other equipment at the site does not hang or >> reboot - so I know the beaglebone hang does not coincide with a power issue >> at the site. >> >> Can anyone give me any tips on diagnosing this? I can see the time of >> hang and powercycle in dmesg and syslog....but there's no hint there as to >> what happened. Everything was "all conditions normal" before the hang. >> >> Has anyone seen this behavior before? >> >> Thanks so much - any help greatly appreciated! >> >> >> -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to a topic in the > Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/f6-QXKbDUZo/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
