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[indrajaal]

@robolink_leila so, several interesting things to note:

• The dashboard is somehow broken, but I am able to navigate to the notebooks, like http://zumidashboard.ai:5555/tree/Zumi_Content/Demo. It's just that navigating to zumidashboard.ai somehow doesn't work.
• After starting an SSH session, I figured out the PID for the main Zumi process, and attached to it via strace as I wanted to see if I could see the messages it's writing to stdout. Interestingly, as soon as I attached to the process, the dashboard started working ! So, I went thru the process of scanning the WiFi n/w, selecting my SSID, entering the password and hitting Connect. It still continues to fail to connect . This is the log for that entire process, not sure if it helps any:

pi@zumi8753:~ $ sudo strace -ewrite -p 628
strace: Process 628 attached
write(1, "getting ssid list\n", 18)     = 18
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1626, si_uid=0, si_status=0, si_utime=2, si_stime=4} ---
write(1, "getting ssid list\n", 18)     = 18
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1661, si_uid=0, si_status=0, si_utime=3, si_stime=3} ---
write(1, "getting ssid list\n", 18)     = 18
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1696, si_uid=0, si_status=0, si_utime=2, si_stime=6} ---
write(1, "getting ssid list\n", 18)     = 18
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1731, si_uid=0, si_status=0, si_utime=2, si_stime=3} ---
write(1, "getting ssid list\n", 18)     = 18
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1766, si_uid=0, si_status=0, si_utime=5, si_stime=2} ---
write(1, "getting ssid list\n", 18)     = 18
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1801, si_uid=0, si_status=0, si_utime=2, si_stime=2} ---
write(1, "app.py : connecting wifi start\n", 31) = 31
write(1, "Please select a WiFi network\n", 29) = 29
write(1, "scripts.py : add_wifi start\n", 28) = 28
write(1, "scripts.py : copying wpa_supplic"..., 41) = 41
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1836, si_uid=0, si_status=1, si_utime=0, si_stime=8} ---
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1837, si_uid=0, si_status=0, si_utime=4, si_stime=3} ---
write(1, "scripts.py : copyed wpa_supplica"..., 40) = 40
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1852, si_uid=0, si_status=0, si_utime=15, si_stime=4} ---
write(1, "None\n", 5)                   = 5
write(15, "\nnetwork={\nssid=\"Please select a"..., 143) = 143
write(1, "added wifi information to wpa_su"..., 41) = 41
write(1, "force all rogue wpa_supplicant ."..., 35) = 35
write(1, "kill all wpa_supplicant\n", 24) = 24
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1853, si_uid=0, si_status=0, si_utime=3, si_stime=5} ---
write(1, "finish kill all wpa_supplicant\n", 31) = 31
write(1, "spa_supplicant setup\n", 21)  = 21
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1861, si_uid=0, si_status=255, si_utime=3, si_stime=5} ---
write(1, "wpa_supplicant finished\n", 24) = 24
write(1, "dhclient start\n", 15)        = 15
write(1, "dhclient end\n", 13)          = 13
write(1, "getting an ip address\n", 22) = 22
write(1, "scripts.py : add_wifi end\n", 26) = 26
write(1, "personality start\n", 18)     = 18
write(5, "\0!", 2)                      = 2
write(5, "\0\0", 2)                     = 2
write(5, "\0\177", 2)                   = 2
write(5, "\0\"", 2)                     = 2
write(5, "\0\0", 2)                     = 2
write(5, "\0\7", 2)                     = 2
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\200\200\300@` ` ` ", 17) = 17
write(5, "@`@`@\300\200\200\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\200", 17) = 17
write(5, "@\3408\f\6\3\1\1\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\1\1\3\6\f\30p\300\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\376W", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\3\377P\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\17", 17) = 17
write(5, "@<`\300\200\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0@\360\340\340\2\3\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\1\3\6\4\f\10\30\20\20\0200\0200", 17) = 17
write(5, "@\20\20\30\30\10\f\4\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
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write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0 `  \0\200\200\0", 17) = 17
write(5, "@\200\0\0\0\0\200\0\240\0\200\0\200\200\200\0\0", 17) = 17
write(5, "@\0\0\200\200\200\0\200\0\0\0\0\0\200\340\200\0", 17) = 17
write(5, "@\0\0\200\200\200\0\0\0\0\0\0\0\0\200\200\200", 17) = 17
write(5, "@\0\0\0\0\0\200\200\200\0\0\0\200\0\200\200\0", 17) = 17
write(5, "@\0\0\200\0\200\200\200\0\0\0\0\200\200\200\0\0", 17) = 17
write(5, "@\0\0\0\200\200\200\0\0\0\200\340\200\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0+\24\0\t7\0\0", 17) = 17
write(5, "@\1\6\370\10\6\1\0>\0?\1\0\0\0?\0", 17) = 17
write(5, "@\6\231\240 \240\221\177\0\0\0\0\0\0?\0\0", 17) = 17
write(5, "@\0161   \33\4\0\0\0\0\0161 \0 ", 17) = 17
write(5, "@\21\0\0\0171   \33\4\0?\1\0\0\3", 17) = 17
write(5, "@<\0?\1\0\0\0?\0\6\25$$$\25\2", 17) = 17
write(5, "@\0\6\31   !\20\0\0?\0\0\0 \0", 17) = 17
write(5, "@\0\0 \0\0\0 \0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(1, "personality done\n", 17)      = 17
write(1, "app.py : connecting wifi end\n", 29) = 29
write(1, "scripts.py : check_wifi start\n", 30) = 30
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1881, si_uid=0, si_status=0, si_utime=0, si_stime=2} ---
write(1, "\n", 1)                       = 1
write(1, "\n", 1)                       = 1
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1894, si_uid=0, si_status=0, si_utime=0, si_stime=2} ---
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1871, si_uid=0, si_status=0, si_utime=2, si_stime=4} ---
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1893, si_uid=0, si_status=0, si_utime=4, si_stime=3} ---
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1895, si_uid=0, si_status=6, si_utime=0, si_stime=1} ---
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1917, si_uid=0, si_status=6, si_utime=1, si_stime=1} ---
write(1, "\n", 1)                       = 1
write(1, "check internet script method fin"..., 36) = 36
write(1, "['Failed to', 'connect.', ' Try "..., 41) = 41
write(5, "\0!", 2)                      = 2
write(5, "\0\0", 2)                     = 2
write(5, "\0\177", 2)                   = 2
write(5, "\0\"", 2)                     = 2
write(5, "\0\0", 2)                     = 2
write(5, "\0\7", 2)                     = 2
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
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write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\370\10\10\10\10\10\0\0\0\200\200\200\200", 17) = 17
write(5, "@\0\200\0\0\210\0\0\0\370\0\0\0\0\0\200\200", 17) = 17
write(5, "@\200\0\0\0\0\200\200\200\200\0\370\0\0\0\0\0", 17) = 17
write(5, "@\0\200\360\200\0\0\0\0\200\200\200\200\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0?\1\1\1\1\1\0\0\17\21   ", 17) = 17
write(5, "@\21?\0\0?\0\0\0?\0\0\0\16\25$$", 17) = 17
write(5, "@$%\26\0\16\21   \21?\0\0\0\0\0", 17) = 17
write(5, "@\0\0?\0\0\0\16\21    \21\16\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
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write(5, "@\200\200\200\200\200\360\200\0\0\0\0\0\0\0\0\0", 17) = 17
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write(5, "@ \21\16\0?\1\0\0\0\1?\0\0?\1\0", 17) = 17
write(5, "@\0\0\1?\0\0\16\25$$$%\26\0\16\21", 17) = 17
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write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(1, "['Failed to', 'connect.', ' Try "..., 41) = 41
write(5, "\0!", 2)                      = 2
write(5, "\0\0", 2)                     = 2
write(5, "\0\177", 2)                   = 2
write(5, "\0\"", 2)                     = 2
write(5, "\0\0", 2)                     = 2
write(5, "\0\7", 2)                     = 2
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
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write(5, "@\0\200\0\0\210\0\0\0\370\0\0\0\0\0\200\200", 17) = 17
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write(5, "@\21?\0\0?\0\0\0?\0\0\0\16\25$$", 17) = 17
write(5, "@$%\26\0\16\21   \21?\0\0\0\0\0", 17) = 17
write(5, "@\0\0?\0\0\0\16\21    \21\16\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
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write(5, "@\200\200\200\200\200\360\200\0\0\0\0\0\0\0\0\0", 17) = 17
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write(5, "@\f\3\0\0\0\0\0\0\0\17\21   \21?", 17) = 17
write(5, "@\0\0\217\21   \221\377\0\0\17\21   ", 17) = 17
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write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\1\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\1\1\1\1\1\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17
write(5, "@\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17) = 17

After this session, the dashboard stopped working again. Re-attaching didn't help.

Is there, perhaps, a better way to capture the logs? Does this look like an RPi Zero WiFi issue again? Is there a way I could just run the commands Zumi is running directly from a terminal to see if it's able to connect to my WiFi?

Another thing is that even though my router has both 2.4GHz and 5GHz n/ws, they have the same name. Could that be the problem? I tried temporarily renaming one of them to Network-2G. After that Network and Network-2G show up, but then other stuff on my n/w like my Chromecast etc stop working .

Anyway, I'll keep digging. I'm starting to look thru RPi Zero W forums as well for WiFi issues similar to mine.

[robolink_leila]

@indrajaal Yes! As long as you are connected to Zumi's network, you can open a terminal session and ssh pi@zumi1234.local (use your 4 digit number). Password is always pi.

[indrajaal]

Thanks, @robolink_leila!

Is it possible to SSH into Zumi in this state (dashboard not working)?

[robolink_leila]

@indrajaal Oh no! Thanks for your feedback. I am going to ask our software engineer what the issue may be and possibly he can get us a test script to run on your Pi. When I get a solution, I'll ask you to set up another support call to run a diagnostic. Thanks for all your patience!

[indrajaal]

@robolink_leila @robolink_wes any guidance, please, on how to proceed here?

[indrajaal]

@robolink_leila following up on my previous post, now, it seems the dashboard is bricked somehow.

After I connect to Zumi and it starts to show the Go to zumidashboard.ai in your browser message, I can't load the dashboard anymore .

I tried doing a full DNS flush and reconnecting, but no dice.

sudo killall -HUP mDNSResponder;sudo killall mDNSResponderHelper;sudo dscacheutil -flushcache

Are there any application logs I can look at/post here? Not sure how the dash is implemented, but, maybe the server powering it has died and just needs to be restarted?

[indrajaal]

Hey, @robolink_leila

I received the new Pi Zero today, assembled it, and now Zumi comes up properly. However, it's now unable to connect to my WiFi

I can see from my router (Comcast Router: Cisco DPC3941T) admin console, that it's trying to connect to the 2.4GHz n/w.

I am, though, able to run the example Jupyter notebooks in Offline mode.

Another thing I noticed was that only the Demo and Tutorials buttons are active in Offline mode. Is that expected?

[robolink_leila]

@indrajaal We will have a RaspberryPi Zero on the way for you this week!

[indrajaal]

Hey @robolink_leila, thanks so much for the support call the other day. Based on the call, I was able to confirm that the RPi Zero is able to boot up, but gets stuck trying to acquire a WiFi address, just as was anticipated.

So, the issue definitely seems to be with its WiFi module.

[indrajaal]

Thank you, @robolink_leila! I setup a support call for this Thursday, 2:00 – 2:30pm.

[robolink_leila]

@indrajaal Most likely it's the RaspberryPi but if you are available for a support call it would help us get some feedback and figure out the next steps. Thank you!

[indrajaal]

Hi, @robolink_leila

I recently received my Zumi ( backer 580), and after assembling it, I'm facing the same issue. After powering it up, it remains stuck at the Loading... step.

I've already followed this tutorial and re-flashed it to no avail. I did notice that the image linked to in the video has the name img_0719.img, so maybe it's not the latest? I can try another re-flash if there's a newer image available.

Please help!

[robolink_leila]

@frankensusan Check out the San Diego Robotics Club on meetup.com! We don't host all of the events, but it's a great community of robot enthusiasts.

[frankensusan]

@robolink_leila Thank you so much for the amazing support visit.
My wee little Zumi is up and running, with updates. So super cute.

Side question, how can I keep informed about local events where Robolink will be participating?

Susan

[sealfish]

@robolink_leila I sure will it’ll be heading your way. I’m sure that’s what it is because I didn’t change anything but the pi and it started working. The GPIO header looked ok without any solder shorting across pins.

[robolink_leila]

@sealfish Could you please send your RaspberryPi to our office? We will diagnose the issue and if we find something wrong we will contact you for reimbursement. Thank you!

Address: 5677 Oberlin Dr #100, San Diego, CA 92121

[robolink_leila]

@frankensusan I will also be sending you information about scheduling a support call. These are unknown issues and we have our team working on them but we may need some more information. Thanks!

[sealfish]

@robolink_leila I did get mine working by swapping out the R Pi Zero. I had one around here that I had to find first and then had to solder a GPIO header on it. But the R P Zero was my problem. So how can we go about swapping the bad Pi that came with the Zumi out?

[frankensusan]

I am having the stuck at loading issue as well.
Susan

[robolink_leila]

@matth I will also be sending you an email shortly.