Turns out there is something weird going on with the handshake between devices. This reddit post has a comment with the solution that worked for me – just a configuration setting on the receiver.
Aug
21
2019
NextCloud and HAProxy
Not sure why I never noticed this before…maybe because I only ever tested from my own network?… Anyway, NextCloud would give me the login page, then after I entered my credentials, it would time out.
I made some changes to my NextCloud and HAProxy configs based on this page, and now it works!
Jul
08
2019
Custom Hugin PTO shortcut
Want to be able to select multiple photos in a panorama, then quickly kick off the Hugin auto-analysis for that grouping
> cat ~/bin/my_pto_gen
#!/usr/bin/env ruby
output = IO.popen(["pto_gen", *ARGV])
output.readlines.each do |line|
if(line =~ /Written output to (.*)/)
system("PTBatcherGUI", "-a", $1, "-b")
end
end
> cat ~/bin/my_pto_gen.desktop
[Desktop Entry]
Version=1.0
Name=Custom Hugin PTO generator
Comment=Initialise a Hugin panorama project from multiple photos & run the assistant
Exec=my_pto_gen %F
NoDisplay=true
Icon=hugin
Terminal=false
Type=Application
Categories=Graphics;
MimeType=image/tiff;image/jpeg;
GenericName=Panorama project generator & assistant
desktop-file-install --dir=/home/matt/.local/share/applications/ /home/matt/bin/my_pto_gen.desktop
update-desktop-database /home/matt/.local/share/applications/
Apr
29
2017
Fix Autofs on Raspberry Pi 3
Doesn’t work, but autofs works on all other machines just fine.
“showmount” works fine.
https://www.centos.org/forums/viewtopic.php?t=45056
mentioned resolv.conf. Found a strange entry there:
domain hsd1.co.comcast.net
no other machines have that entry. How to remove?
Didn’t work.
Maybe change /etc/dhcpcd.conf to not request the domain name?
That removed the domain from resolv.conf, but autofs still fails.
Manually running sudo mount bruce:/ /mnt/bruce/ works, so it’s not NFS sucking. definitely autofs.
> mount |grep bruce
bruce:/ on /mnt/bruce type nfs4 (rw,relatime,vers=4.0,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=192.168.1.106,local_lock=none,addr=192.168.1.102)
maybe I need to uncomment the NFS4 line in /etc/auto.net? I’ve never done that anywhere else…no effect
This worked…no idea why: http://russell.ballestrini.net/autofs-net-automount-stopped-working/
I’ll try rolling back my other changes to see if they’re necessary too. Nope, only the change to /etc/auto.master
Nov
25
2016
Packet sniffing for fun and profit
I have a commercial IOT product that I want more control over. Sure, I can control it with the free Android app, but I want my home server to be able to control it, too. This means trying to understand how the app controls it over the network, and attempting to replicate that communication.
This means I have to do some packet sniffing.
Nov
23
2016
Getting started with MQTT
At this point, I have a few IOT things on my home network. The first were a couple of EcoPlugs Wifi outlets that I use to control my gutter heaters in the winter, and the next was a custom garage door controller. For the former, I’m basically controlling them by using a replay attack (I hope to make a post about this soon)…re-sending packets that I observed the EcoPlugs app sending. For the latter, I’m using a custom http interface. Since both of these contain an ESP8266, I’d like re-program them and unify them both to use the MQTT protocol.
While browsing Hackaday, I came across their Minimal MQTT series. In this post, I’ll begin by walking through that series, noting my thoughts, then conclude by getting things set up the way I want.
Read the rest of this entry »
Nov
19
2016
Issues upgrading from Ubuntu 15.10 to 16.10 (via 16.04)
Canonical recently dropped official support for Ubuntu 15.10 “Wily Werewolf”, so I decided to upgrade. I also don’t like being stuck on Long-Term-Support releases, so I did 2 upgrades in sequence: 15.10 “Wily Werewolf” to 16.04 “Xenial Xerus” to 16.10 “Yakkety Yak”. In the past, I’ve just done a clean install, but the trouble with that is having to re-do all my various customizations. This time I figured I’d just try an in-place upgrade. Of course, this meant that my customizations conflicted with packages changes. I’m still not sure which method is better.
Sep
12
2016
28BYJ-48 stepper motor
Based off of this post on hackaday about a simple clock using a cheap stepper motor, I decided on a whim to buy some. I chose these on Amazon because they had the desirable combination of being cheap and prime-eligible.
Before they arrived, I did some reading and found that there were different verdicts on the gearing…
Jun
06
2016
DIY Large Seven Segment Display
I had an idea for a cool project, but for it to work well, I needed some large 7-segment displays…like 3-4 inches tall. Unfortunately, the only ones I could find for sale on-line were absurdly expensive. I remembered seeing several folks make their own 7-segment displays, so that inspired me to try my hand at making my own.
May
12
2016
MAX7219 Seven-segment driver
I have a couple projects in mind where I want to use a seven-segment display (one of them where I want large digits), but I don’t want to dedicate too many pins to driving the display. Also, writing custom code to multiplex the digits seemed tedious.
I read about the MAX7219 chip, which lets you drive up to 8 digits over SPI, and it seemed to be just what I was looking for.
