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[robolink_leila]

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

[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?

[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]

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

[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]

Thanks, @robolink_leila!

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

[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]

@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
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\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
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\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
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\16\21   1\0\16\21   ", 17) = 17
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
write(5, "@   1\0?\0\0\00000\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
write(5, "@\21?\0\0?\0\0\0?\1\0\0\0\1?\0", 17) = 17
write(5, "@\00000\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
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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(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
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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 I'll forward this information to our software engineer. Thanks for the updates!

[indrajaal]

Hey, @robolink_leila

Any update on this issue?

[robolink_leila]

@indrajaal
We've noticed that some browsers attach "www" in front of zumidashboard.ai and then you can't reach it. Can you check that this isn't the case?

For internet connection, open a terminal session while you are in offline mode and reset the connection manually by running sudo sh /bin/rpi-wifi.sh. Then disconnect from Zumi AP network and reconnect again. Go back to the dashboard and try to connect again to the internet.

[indrajaal]

@robolink_leila upon restarting Zumi, I'm able to bring up the dash. However, Wi-Fi still doesn't work. I ran the command, disconnected from Zumi, reconnected and tried connecting via the dash, but to no avail

pi@zumi8753:~ $ sudo sh /bin/rpi-wifi.sh; echo $?
Starting Wifi AP and client...
wpa_supplicant: /sbin/wpa_supplicant daemon failed to start
run-parts: /etc/network/if-pre-up.d/wpasupplicant exited with return code 1
ifup: failed to bring up wlan0
net.ipv4.ip_forward = 1
0

Driver/Code modes disabled?

[robolink_leila]

@indrajaal Have you tried a mobile hot spot or any other networks? I may need to give you the updated image directly so that you can reflash the SD card. The new update should help solve any connection issues. We are still testing the new image but I will update you when we get that published.

[indrajaal]

Thanks, @robolink_leila! I'll try connecting to my iPhone's hotspot today. Don't have any other n/w to try. And, I'll try the new image once available.

Any idea why the Drive/Code modes are disabled in the dash? Is this expected?

[robolink_leila]

@indrajaal Yes, Drive Mode should be released in the next update. Code Mode will take some more time to get Blockly polished for users

[indrajaal]

@robolink_leila connecting to the Hotspot on my iPhone 11 also did not work.

[robolink_leila]

@indrajaal We have had a few bugs in our newest image but I will be finishing up testing today to get that out to you.

[robolink_leila]

@indrajaal Here are the instructions for uploading the new SD card image. Thank you for waiting!