[beagleboard] BBB not accessible
Hello, I am looking for some help. Appreciate any input. I have a BBB running Ubuntu 14.04. I also have TP-Link TL-725N wifi dongle. I did follow instructions from this site to http://coremega.tumblr.com/post/78194792401/install-tp-link-wireless-n-adapter-tl-wn725n-on to build the required drivers for the wifi dongle to work. After compiling the wifi dongle works. I am using the BBB along with OpenSprinkler h/w to irrigate my landscape. The BBB is powered by the OpenSprinkler h/w. The issue I have is that approximately 36 hrs to 48 hrs after a boot up, the BBB becomes inaccessible. I have to go and unplug the power and put it back in to restart it. I keep pinging it all the time from my computer at home so that I am convinced I can access it. But when the board is not accessible, ping comes back saying Request timeout for icmp_seq 44990 ping: sendto: Host is down. I cannot ssh as ssh times out. I can see that the heartbeat led is not on. Only the power led is lit and stays on as it does always. Since the h/w is mounted on a case out side my home right by my irrigation valves, I cannot run a network cable directly to it. I am dependent on the wifi dongle to get access to the BBB. I have been struggling the past couple of weeks when I purchased the BBB. I did look at the syslog file in /var/log and at the time of failure, the syslog has a bunch of ^@ symbols for a couple of lines. I am not sure what else I could do to make this board stay up. FWIW, the board is pretty much inactive on times when there is nothing to do. The irrigation program is used on demand once every 3 days or so. Much depends on how hot it gets and how the soil gets dry etc... Any suggestions as to what might be happening here and if I should try some thing? Ram -- 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 beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[beagleboard] BBB Rev C - ping responses after a delay.
Hello, I am getting responses to my pings after about the 12th attempt or so. This is after a long time accessing the BBB for anything. In other words no access to BBB for a long time. Then sending ping requests, it responds with From 10.0.1.116 icmp_seq=2 Destination Host Unreachable From 10.0.1.116 icmp_seq=3 Destination Host Unreachable From 10.0.1.116 icmp_seq=4 Destination Host Unreachable From 10.0.1.116 icmp_seq=6 Destination Host Unreachable From 10.0.1.116 icmp_seq=7 Destination Host Unreachable From 10.0.1.116 icmp_seq=8 Destination Host Unreachable From 10.0.1.116 icmp_seq=10 Destination Host Unreachable From 10.0.1.116 icmp_seq=11 Destination Host Unreachable From 10.0.1.116 icmp_seq=12 Destination Host Unreachable 64 bytes from 10.0.1.139: icmp_seq=13 ttl=64 time=208 ms 64 bytes from 10.0.1.139: icmp_seq=14 ttl=64 time=1.64 ms 64 bytes from 10.0.1.139: icmp_seq=15 ttl=64 time=3.09 ms My OS is Ubuntu and uname -a shows: Linux arm 3.14.33-ti-r50 #1 SMP PREEMPT Thu Feb 12 03:52:59 UTC 2015 armv7l armv7l armv7l GNU/Linux I am using TP-Link wifi dongle - TP-725N and I followed the instructions on the URL shown below to install the required drivers. http://coremega.tumblr.com/post/78194792401/install-tp-link-wireless-n-adapter-tl-wn725n-on The wifi link is up and functional for as long as I am logged in or working on it. If there is no activity for extended periods of time, I see the above ping behavior. My use case: I am using the BBB with Opensprinkler to control my irrigation valves. I was able to integrate the h/w + s/w and mounted the entire set up in the same location where my previous irrigation controller was. I use the application once every 3 days. The app times out and it cannot connect to the BBB. I have to walk to the location where the controller sit and remove power wait a few seconds and connect back the power. Then the app is accessible. BBB gets it power (5V) from the opensprinkler h/w. The opensprinkler h/w takes 25V A/C. So I removed my installation and brought my BBB + Opensprinkler h/w inside my home and have been trying to see if this thing will stay up for days together without any activity. It is about 24hrs and I am seeing this ping behavior. How can I keep it active all the time and respond immediately. It may be an overkill as the computer is working even when there is no irrigation valves to be activated or de-activated. At first my suspicions were on the BBB and was thinking it was hung. But /var/log/syslog does not show any errors. I can see the DHCPDISCOVER for eth0 wake up and try to get an IP but since nothing is connected to the eth0 port, it goes back to sleep. Any thoughts or pointers as to where I can look for some solution. I also had a small cron job run every 5 minutes on the BBB, it would do ps -ef redirect the output to /dev/null and then ping my router for 3 times. I captured the ping output in a log file and I keep overwriting the log file and I see it having the most recent time stamp mapping to the last 5 minute interval indicating that the board has been working without failures. But I have to resort to the rebooting the board because my app is not able to connect to the BBB. Thank you and appreciate your time. Ram -- 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 beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
