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Traceroute is also uninteresting because it provides no information.

traceroute to mark1.local (Real IP Address Appears Here), 30 hops max, 60 byte packets
 1  * * *
 2  * * *
 3  * * *
 4  * * *
 5  * * *
 6  * * *
 7  * * *
 8  * * *
 9  * * *
10  * * *
11  * * *
12  * * *
13  * * *
14  * * *
15  * * *
16  * * *
17  * * *
18  * * *
19  * * *
20  * * *
21  * * *
22  * * *
23  * * *
24  * * *
25  * * *
26  * * *
27  * * *
28  * * *
29  * * *
30  * * *

I’m able to connect to the Mark I via ssh without difficulty.


Darn I thought that would have shown something. No firewall? Nothing like that? I wonder if it’s a ufw command that’s needed, like

sudo ufw allow 8081


Nope, my laptop and the Mark I are on the same internal network. No firewall between them. The only slight variation (and this sounds weird) is that my laptop is wired to the network, and the Mark I is wireless. They’re connected to the exact same router though.



OK, check to see whether your router has something called “wireless isolation” turned on. It’s kinda like a firewall between wired and wireless devices.


As far as I can tell, my router doesn’t have anything called that on or off. I wasn’t able to locate any settings in my router configuration like that.


@linuxrants, @KathyReid
Thought I would chime in on this. if you used my code as is I had the IP address for my device hardcoded.
This should be changed to the IP address of your Mark1.


That was just a link to your original code. It was updated to the correct local IP before I posted here.


No problem, thought I would be sure. Just an FYI my route has a setting called AP isolation I think that is the same thing. Are you able to execute the code on a device that is also on wifi and not hardwired?


No. I tried from my work computer and that didn’t work, but it’s Windows and who knows what the heck is going on there. I also tried it on another Linux workstation I have in the house, with the same results. I thought this might be relevant.

nmap -Pn TheCorrectIPAddressIsHere -p 8181

Starting Nmap 7.60 ( ) at 2018-07-11 13:46 MST
Nmap scan report for mark_1 (TheCorrectIPAddressIsHere)
Host is up.

8181/tcp filtered intermapper

Nmap done: 1 IP address (1 host up) scanned in 2.11 seconds

I get this from both Linux workstations I try to use.


Not sure, your troubleshooting tools are not familiar to me. A simple thing that I did here was enter the ip_address:8181 in my browser on my remote linux computer and returned the following.

Traceback (most recent call last):
File “/opt/venvs/mycroft-core/lib/python3.4/site-packages/tornado/”, line 1390, in _execute
result = self.prepare()
File “/opt/venvs/mycroft-core/lib/python3.4/site-packages/tornado/”, line 2103, in prepare
raise HTTPError(self._status_code)
tornado.web.HTTPError: HTTP 404: Not Found

For the record I have a debian machine hardwired to my network and a picroft on wireless.


I have a working version now. I felt we were getting a little too far into the weeds troubleshooting my local network, so I moved the code onto my Mark I and used the virtual environment that Mycroft itself uses. After one very stupid mistake this morning, it’s working. I appreciate your time and patience, and that of @KathyReid.


I wanted to let you and @KathyReid know what all the fuss was about. It’s not world shattering or anything, but I did have something I was aiming for. I took your script @pcwii and made a super minor change to it. It pull the command that is sent to the message bus from the command line instead of having it hard coded in. I had intended on having your script be something that I could call from remote hosts for notification purposes, but I had trouble with the network stuff (which I’m sure you remember). Instead, I cobbled together a quick POC for myself that checks disk usage against a predefined threshold. Looks like this:



  ssh -n pi@mark1.local "/home/pi/ \"${ms_message}\""

if [ -f fs_check.txt ]
  while read LINE
    echo "Checking ${LINE}."
    ms_drive=`echo ${LINE}|cut -d\/ -f3`
    use_percent=`df -h|grep ${LINE}|sed 's/ \{1,\}/|/g'|cut -d\| -f5|cut -d\% -f1`

    if [ ${use_percent} -gt ${ms_threshold} ]
      ms_message="speak Storage threshold exceeded for ${ms_drive} on ${host_name}. Drive is ${use_percent} percent full."
      sleep 10s 
  done < fs_check.txt

echo "All done"

So, what this basically does is check how much of a drive is used, and then it calls your script (slightly modified) on the Mark I to speak aloud the alert that I choose to send it. Again, this is just a super crude POC, but it works, and it’s something I can adapt further for any kind of alert I want to send anywhere on my network. Again, thank you both so much for your help.