**** BEGIN LOGGING AT Mon Jan 25 02:59:57 2021 Jan 25 04:13:43 Jan 24 19:56:52 beaglebone wpa_supplicant[1095]: wlan0: CTRL-EVENT-SIGNAL-CHANGE Jan 25 04:14:44 This appears to be the only thing related to the wifi issue... Just happened about twenty minutes ago. Every time it does, my connection to ssh gets reset and I get kicked out, and the wifi name no longer shows up on my computer Jan 25 04:15:34 And the board is still connected to the internet, because when I do ping 8.8.8.8 it receives packets. Jan 25 05:08:18 wait, the beaglebone is connected to your wifi? then why *also* use AP mode? Jan 25 05:08:41 instead of just connecting to it via your wifi Jan 25 05:10:12 (that's why I assumed it wasn't connected to internet, since it doesn't make much sense to use AP mode if the beaglebone is connected to your local wifi network) Jan 25 05:13:10 anyway, zZ Jan 25 10:51:49 what are people using for cellular modems? Looking for the BBGW. I Have looked into Hologram Nova/sim. Anyone have suggestions or advice? Jan 25 17:32:52 m Jan 25 18:12:15 beaglebone wpa_supplicant[1095]: wlan0: CTRL-EVENT-SIGNAL-CHANGE Jan 25 18:12:22 will disabling dhcp fix this? Jan 25 18:20:11 that message does not indicate a problem, nor is it related to the access point at all; it indicates the kernel driver reported that the signal strength of your wifi connection has changed Jan 25 18:21:17 (presumably only substantial changes in signal strength are reported, otherwise it seems like that event would be rather prone to get spammy) Jan 25 18:31:57 hmm, then what could be causing the wifi on the board to randomly become unavailable to my computer? Jan 25 18:35:00 no clue... using AP mode and client mode at the same time is kinda iffy anyway since it somehow has to multiplex use of the antenna between these functions... they evidently do manage to, but I'm not sure at what cost, and in general I'd suggest only using one or the other, not both at the same time. like I said before, if the beaglebone is connected to your wifi network it's kinda pointless to use ... Jan 25 18:35:06 ...AP mode at the same time Jan 25 18:35:43 if you really want to dig into it there are a variety of debug facilities available to get more information, but I don't really have time to walk you through that stuff Jan 25 18:37:18 The only reason I need to the wifi to work is because attempting to use internet over usb disconnects my computer from the internet since my computer uses wifi Jan 25 18:37:55 uhh, that explanation doesn't really make sense... also I don't get what that has to do with what I said Jan 25 18:38:03 can't you connect both the pc and the beagle to the same wifi network? Jan 25 18:38:07 I didn't say "don't use wifi" or "use usb", I said don't use AP mode Jan 25 18:39:04 exactly... the beaglebone is connected to your wifi network, your computer is connected to your wifi network, therefore you can reach your beaglebone that way. there's no reason to have the beaglebone set up its own access point and connect to that Jan 25 18:39:24 unless I misunderstood what you've said so far Jan 25 18:39:30 how would I disable AP mode? the only reason I am having trouble with this is because I need to use ssh but can't because I have to be connected to wifi, so if there was some other way to connect to the board other than connecting to its wifi network then (and would still allow me to ssh) then I would do that Jan 25 18:40:43 actually it's starting to sound like you are already connected like that but just phrased it poorly earlier (I'd need to dig up what you said to give me the impression you used AP mode) Jan 25 18:42:19 though then I'm confused even more, since you said the beaglebone could still reach the internet, which means it's still connected to wifi Jan 25 18:42:26 and why do I need to connect to my beaglebone's network to ssh? it's already connected to wifi. Jan 25 18:43:02 okay, so you're definitely not using AP mode, I must have misunderstood that part when you first talked about your wifi problem Jan 25 18:43:31 so the beaglebone is still connected to wifi, but for some reason you're having trouble ssh'ing to it? Jan 25 18:43:51 are you connecting using IP or using hostname? Jan 25 18:44:20 yes, it is connected to wifi. when it's connection stops showing up on my computer, I am kicked out of ssh, but I'm still able to connect to the board through PuTTY and do ping requests to confirm it still has a connection to the internet. However, putty sucks, and I want to continue using ssh, but can't since it keeps disconnecting me Jan 25 18:44:41 ah, that's why I got the impression... what do you mean by "its connection stops showing up on my computer" ? show up where? Jan 25 18:44:53 I've been connecting using the hostname, I think? (192.168.7.2). I just did ifconfig and saw the inet value. if I connect using that, will it stop disconnecting? Jan 25 18:45:01 in the list of available wifi networks Jan 25 18:45:26 that's its access point, which is exactly why I thought you were talking about its access point mode Jan 25 18:45:45 so is the inet for wlan0 the ap or is 192.168.7.2? Jan 25 18:45:56 192.168.7.2 is usb networking only Jan 25 18:46:24 so is that why I need to connect to the board's wifi before I can ssh when I use that value? Jan 25 18:46:41 none of that makes any sense Jan 25 18:46:50 I use ssh debian@192.168.7.2 Jan 25 18:47:12 and wait, you're saying you *do* connect to the board's wifi? I thought you were keeping your computer connected to your own wifi network? Jan 25 18:47:41 no, I have to connect to the board's wifi "hotspot" in order to ssh to it Jan 25 18:48:11 no you don't, not if you use the correct hostname or IP address Jan 25 18:48:41 also its IP address on the wifi hotspot is 192.168.8.1, 192.168.7.2 is only used for usb networking Jan 25 18:50:48 yeah, but then that gives me the same issue: the wifi hotspot will randomly disappear from my list of wifi connections and I'll be disconnected from ssh Jan 25 18:51:05 I just used the wlan0 ip and it seems to work without me needing to connect to the hotspot Jan 25 18:52:56 it's really puzzling to me why the wifi access point connection would be of any relevance if you were ssh'ing to 192.168.7.2 ... I guess maybe something funky was going on with IP routing, I wonder if the beaglebone gives itself as default gateway when connected to the AP (it shouldn't, but maybe it does) Jan 25 18:53:16 are you connected via usb at the same time? Jan 25 18:53:55 the usb is connected to my computer, yes Jan 25 18:54:09 but I can't sue the usb for internet connections since I don't have ethernet Jan 25 18:54:27 maybe now that I'm using the wlan0 ip, it won't reset my connection, but we'll see Jan 25 18:54:39 then 192.168.7.2 should work unconditionally, regardless of the wifi status of your laptop nor that of the beaglebone Jan 25 18:55:09 "I can't use usb for internet connections since I don't have ethernet" ... that sentence also makes no sense at all Jan 25 18:55:17 what do those things have to do with each other? Jan 25 18:55:50 well, when I was first setting up the board and attempting to connect it to the internet using the usb cable, it disconnected my computer from wifi Jan 25 18:56:05 also, 192.168.7.2 will never work if I'm not connected to the board's hotspot Jan 25 18:56:10 then you just did something wrong Jan 25 18:57:06 the procedure for sharing your computer's internet to the beaglebone does not depend on whether your computer is connected to the internet via ethernet, wifi, or any other means... it is however in all cases tedious and error-prone, and connecting the beaglebone directly to your network (via ethernet or wifi depeneding on beaglebone model) is always easier and preferred Jan 25 18:58:19 well my beaglebone is definitely connected to the wifi itself, so hopefully using the wlan0 ip instead of the hotspot ip will prove more reliable Jan 25 18:58:59 attempting to share your computer's internet to the beaglebone via usb can also cause you to lose the ability to connect to the beaglebone via usb... so I wonder if that's indeed what you managed to do Jan 25 18:59:31 except, hold on a minute... you said "192.168.7.2 will never work if I'm not connected to the board's hotspot" ... so how did you check the beaglebone's logs? Jan 25 19:00:16 I used a usb serial connection through putty Jan 25 19:00:25 I've been using it whenever the hotspot fails Jan 25 19:00:25 since my suggestion was to connect via usb to inspect the logs, yet it sonuds like you managed to break your usb networking Jan 25 19:00:28 ah Jan 25 19:01:00 and what steps did you try to follow to share your computer's internet to the beaglebone? since evidently whatever you did broke your usb networking connection Jan 25 19:02:14 I connected the usb to the computer and it kept turning off my wifi. However, whenever the usb was connected, I was able to access 192.168.7.2 Jan 25 19:02:35 what OS are you using on your computer? Jan 25 19:03:01 connecting the beaglebone via usb should not have any effect on your wifi Jan 25 19:03:42 not on Mac or Windows anyway, nor on any Linux system unless they use wicd or some ancient version of gnome networking manager Jan 25 19:04:34 Windows. I was in the network and sharing center I think, and before I disabled some setting pertaining to sharing, the interface, I think it was either eth2 or eth3, would be connected whenever the board booted up, and would subsequently disable my computer's wifi card Jan 25 19:05:02 so you *did* try to mess with sharing settings Jan 25 19:05:24 yes, because if I didn't, the board kept turning off my computer's wifi Jan 25 19:05:32 like, normally if you plug a beaglebone into a windows PC and do absolutely _nothing_ you can ssh to 192.168.7.2 and you will not lose wifi Jan 25 19:05:57 ... I think Jan 25 19:06:51 any windows users around? I know that that's how it's supposed to work, but it would be useful to get confirmation on that :P Jan 25 19:06:59 Okay, it was Ethernet 3. I disabled sharing for that one I believe. Kept disabling my wifi card, but whenever it did, it would allow me to connect to 192.168.7.2 Jan 25 19:07:29 sharing should not be enabled unless you enabled it yourself in the first place Jan 25 19:07:35 I would use linux but then I'd have to occupy another usb port on my computer since I'm running a dual boot for that Jan 25 19:09:14 actually I do know for sure that windows will not disable wifi when you connect another network interface (usb or ethernet) Jan 25 19:09:35 so whatever problems you have are most likely caused by messing with settings Jan 25 19:09:53 make sure internet sharing is disabled on all interfaces Jan 25 19:10:26 even wifi? Jan 25 19:10:37 yes Jan 25 19:11:21 all interfaces should just have their default settings... i.e. configure IP address (and everything else) automaticaly, no internet sharing Jan 25 19:12:58 yeah, my wifi sharing is disabled. but it seems like my usb connection to the board no longer shows up under network connections Jan 25 19:13:57 I don't know enough about windows to be able to speculate how you might break things that badly :P Jan 25 19:14:43 ohh, eithernet 3 did show up actually, but it's disabled Jan 25 19:14:56 because you disabled it Jan 25 19:14:58 I know for fact if I enabled it I'd lose my wifi connections Jan 25 19:15:01 yeah Jan 25 19:15:23 you shouldn't, unless you still have weird non-default network settings Jan 25 19:15:28 *it shouldn't Jan 25 19:15:44 "Remote NDIS Compatiable Device" Jan 25 19:16:48 yes it's the beaglebone's RNDIS interface... which is microsoft's proprietary protocol for usb networking because microsoft didn't implement any of the standard usb networking protocols defined by the USB Consortium, because microsoft doesn't give a fuck about standards Jan 25 19:18:17 wonder how they benefit from implementing their own protocol Jan 25 19:19:39 anyway, unless you still have internet sharing enabled anywhere, or your wifi network uses the 192.168.7.0/24 IP network (which seems unlikely), there's no reason for usb networking to interfere with your wifi Jan 25 19:22:31 gonna check the setting for eth3 and the other ethernet networks. if it still disables wifi after that then idk what's happening Jan 25 19:25:07 or unless the beaglebone erroneously hands out a default gateway... but it shouldn't Jan 25 21:56:06 10:51 what are people using for cellular modems? Looking for the BBGW. I Have looked into Hologram Nova/sim. Anyone have suggestions or advice? Jan 25 21:56:06 Any answers yet? Jan 25 21:56:28 not that many people use cellular modems Jan 25 21:56:57 I'd personally put anything usb-based on the bottom of the list though Jan 25 21:57:01 oops, wrong question, apols... Jan 25 21:57:12 lol Jan 25 21:57:32 23:20 what do entry level people do in this field Jan 25 21:57:32 23:20 debugging Jan 25 21:57:32 23:20 embedded systems role Jan 25 21:57:32 did you get any pointers or leads? Jan 25 21:58:39 i've become fascinated by the x15 Jan 25 21:58:41 oh, I didn't really understand what you were asking nor do I feel like I have any insight into what "people" do Jan 25 21:59:03 embedded systems is like DSP..... Jan 25 21:59:07 it's a dark art Jan 25 21:59:57 neither is a dark art, and I don't really see the connection Jan 25 22:00:33 zmatt: this is a journal article length argument Jan 25 22:01:17 if you say so Jan 25 22:14:33 i do indeed Jan 25 22:15:19 as soon as i finished my phd on dsp, i wanted to do it all over again despite the exhaustion Jan 25 22:16:19 zmatt: do you have any opinion on the links between functional analysis and DSP? Jan 25 22:16:31 i think they are the same thing Jan 25 22:20:00 mhh not sure I agree with that... functional analysis is on one hand much wider in scope, while at the same time not being concerned with the numerical and optimization aspects of DSP Jan 25 22:23:00 but I do think it's valuable to have a more general mathematical background, instead of doing "cookbook" dsp :P Jan 25 22:23:58 and DSP was for me a motivation to dig a bit more info functional analysis (my previous mathematical background was more things like algebraic geometry) Jan 25 22:24:15 *into Jan 25 22:30:45 it's also fun to see connections with other subjects... e.g. protecting data integrity with a cyclic code (like a CRC or BCH code) can be viewed as making certain spectral lines vanish, which gives intuitive sense to why CRCs are great at protecting against burst errors Jan 25 22:31:35 zmatt: thank you for elucidating your thoughts on FA Jan 25 22:31:46 i love discussing FA vs DSP with people Jan 25 22:37:25 fourier transform can also be generalized to locally compact abelian groups... which I think takes it outside the scope of functional analysis? Jan 25 22:51:05 (but also outside the scope of DSP of course) Jan 25 22:55:09 actually never mind, that's still about real- or complex-valued functions on those groups Jan 25 22:55:39 I shouldn't try to recall math I haven't used recently while my attention is mostly elsewhere :P Jan 25 22:55:55 afk Jan 26 02:10:53 Ewa **** ENDING LOGGING AT Tue Jan 26 02:59:57 2021