The Raspberry Pi Zero has an unusually sized HDMI port which means it can be hard to hook up to a monitor. If you’re just using it for the terminal you don’t need to see the output anyway. Here’s how to set it up with SSH and Wifi so you’ll just need a power cable to get started.
Download the latest Raspbian Stretch image. Don’t use the noobs installer.
Follow their installation guide to get it onto the SD card. You’ll need to flash the image to the card with Etcher or a similar tool to make sure everything has the correct permissions and boots properly.
Etcher automatically ejects the disk once flashing is completed so remove it from your computer and reinsert it. You’ll probably see a message about needing to format the drive before you can use it. Be sure not to format the drive or you will have to start over.
Open a text editor like Notepad++ and create a file on the drive called “ssh”. The tricky part here is that it need to have no extension. In Windows this is kind of frowned upon but to get it to happen chose save as > change the file type to “all files (*.*)” and then save it as “ssh” with the quotation marks. The quotation marks will be stripped away and no extension will be added. This file can be blank.
Create one more file and save it as “wpa_supplicant.conf” also to the root of the drive so it’s one of the first files that you see. This file needs your wireless network information and be sure it’s correct or you’ll spend a while troubleshooting.
Then eject the drive and put it into your Raspberry Pi. You can power it up but I would recommend pulling up your router admin page now before you do. This should make it easier to spot the new IP address which you’ll need to connect to the Raspberry Pi. By default, it’s called “raspberrypi” on the network but it’s not as reliable in my experience as the IP address.
Default user and password pi and raspberry
Once you have that you’re ready to SSH into the machine with your preferred SSH program. Personally, I use Bitvise SSH which has tons of functionality but still is the easiest to configure correctly. Here’s the website. The download link is “Bitvise SSH Client installer “
I was installing the Bitnami Odoo 11 module on my AWS t2.nano. It’s a fresh instance with a 1gb swap partition and 500mb of hardware RAM. This should be enough to run most if not all Bitnami packages. However when I was installing the package ontop of Bitnami LAMP I got error messages.
Unable to create symbolic link
TLDR: You probably need to restart the machine and install from the command line.
I tried a variety of things to resolve the error
confirm that you have enough memory
confirm that you have sufficient disk space
confirm that the user can create symbolic links in the location mentioned by bitnami
link -s bitnami_source bitnami_target
If you are able to do all these things a simple restart fixed the problem for me. You can run the installed from the command line without giving resources to the GUI which also seems to help. I actually found it a little nicer than the GUI interface.
./bitnami-installer-packge.run --mode text
Specifically, I wanted to install this responsive backend theme so I could get convenient access from my phone.
I found the sources on git : https://github.com/Openworx/backend_theme.git
use git clone to checkout the sources into your /opt/odoo10/custom/addons folder. All themes are addons so they go in this folder. Confirm that this custom folder is part of the addons path in the config file (/etc/odoo/odoo.conf for odoo 10)
git clone --depth 1 https://github.com/Openworx/backend_theme.git
the problem is that git clone doesn’t do the folder structure exactly as Odoo expects it so create a symlink to the proper directory.
ln -s /opt/odoo10/custom/addons/backend_theme/backend_theme_v10 /opt/odoo10/custom/addons/backend_theme_v10
enter developer mode in your Odoo10 interface which is located in Settings on the right-hand side under “share the love.” Click on “Browse Apps” which is automatically filtered to include only “apps” so clear that from the search area and search for the name of the theme you installed. In this example, it’s Material/United Backend Theme.
Click Install on the theme and you’re finished! Now you can use git to check for updates to the theme or have them automatically pulled down with a chron job. You’ll need to hit the upgrade button to apply any pulled updates.
Taulman BluPrint is a filament claiming to print strong parts that are very heat resistant.
High heat resistance means high print temperatures for most plastics so this prints at a minimum of 265ºC depending on which website you believe. Taulman’s website says 285C is the recommended Print temp.
They also claim that glass heated to 110C is the right print surface. I find it hard to believe that plain glass will hold onto any plastic so my first attempt was using Wolfbyte for Nylon. The filament was printing well at 265-280ºC but after a few layers (10) promptly removed itself from the print bed and tried to cause a big mess. I was there to cancel before any real harm was done.
Next I’m testing glass with hair spray. Heated to 110ºC and with a fresh generous application of hairspray. It’s held strong much farther along than the Wolfbyte which makes me think it may not be a nylon based material. Perhaps it’s a PC derivative which generally prints at much higher temperatures.
After 1 hr 45min the corners of the 4×4 rectangle are showing noticeable curling. A 3 pass brim was added for the first layer but has pulled up from the bed. The front of the printer is not enclosed for this test and only the front 2 corners are peeling.
The print finished and didn’t completely detach from the build plate after 3hr 41min build time. Although it was close to detaching. Final weight is 3.8 ounces or 108 grams.
2nd part test print adjusted the bed temp to 120ºC. 4×4 square is not extruded as high and should have less issues with warping. Increased the brim to 5 passes roughly 3.5mm. I also closed the front of the printer
The part appeared to be well attached to the print bed for the entire print. Minimal signs or warping on the corners. By the time I checked the printed the build plate had cooled and the part completely released from the glass with hairspray.
Predefined relay numbering
Relay # – GPIO / wPi # – Function – BCM
1 – 21 – Printer Power – 5
2 – 22 – General Lights – 6
3 – 26 – External Fans – 12
4 – 23 – Additional Hotend Light – 13
5 – 27 – – 16
6 – 24 – – 19
7 – 28 – – 20
8 – 29 – – 21
Login to Raspberry Pi
sudo su root
sudo chmod a+rx *.sh
This creates 6 files and sets them to executable.
The following blocks of code go write into these newly created files.
printf '#!/bin/bash\ngpio mode 21 out\ngpio write 21 0' >> printer_on.sh
printf '#!/bin/bash\ngpio mode 21 out\ngpio write 21 1' >> printer_off.sh
printf '#!/bin/bash\ngpio mode 22 out\ngpio write 22 0' >> lights_on.sh
printf '#!/bin/bash\ngpio mode 22 out\ngpio write 22 1' >> lights_off.sh
printf '#!/bin/bash\ngpio mode 26 out\ngpio write 26 0' >> fans_on.sh
printf '#!/bin/bash\ngpio mode 26 out\ngpio write 26 1' >> fans_off.sh
printf '#!/bin/bash\ngpio mode 23 out\ngpio write 26 0' >> hot_lights_on.sh
printf '#!/bin/bash\ngpio mode 23 out\ngpio write 26 1' >> hot_lights_off.sh
edit octoPi Config to add some system actions
- action: printer_on
name: Printer On
- action: printer_off
confirm: Are you sure you want to turn off the printer?
name: Printer Off
- action: lights_on
name: Lights On
- action: lights_off
name: Lights Off
- action: fans_on
name: Fans On
- action: fans_off
name: Fans Off
- action: hot_lights_on
name: Hotend Lights On
- action: hot_lights_off
name: Hotend Lights Off
- command: printer_on.sh
- command: printer_off.sh
Reboot the octoPi server to get all the changes into the system.
If your camera isn’t working correctly open /boot/octopi.txt and adjust the camera_usb_options
for me these are the correct settings camera_usb_options=”-y -r 640×480 -f 15″
more info and settings here https://github.com/foosel/OctoPrint/wiki/Webcams-known-to-work
it’s always good to start with :
sudo apt-get update
sudo apt-get upgrade
This just makes sure the system is up to date. Then you need to install the actual motion software
sudo apt-get install motion
then I had to change the permissions of a few files so that the pi user could read and write to them. I had seen that motion was going to create a new user for itself but as of today it’s running as the default user. I didn’t go out of my way to change that behavior since it appears to be the default now on a clean install.
sudo chown root:pi /etc/motion/motion.conf
sudo chown root:pi /var/lib/motion
sudo chown root:pi /tmp/motion.log
sudo chmod 774 /etc/motion/motion.conf
sudo chmod 774 /var/lib/motion
sudo chmod 774 /tmp/motion.log
if you’re having trouble try manually starting motion with
This will let you see the output from the startup and check to make sure video is coming through on port 8081. Also take a close look at the motion.conf file. It’s got tons of explanations of the options and everyone’s setup will be a little different.
Once I changed all the permissions and testes just reboot the Pi to get the daemon up and running. It should start automatically from now on which makes it robust to power outages and disruptions.
Side note: My web cam is 1080 but the processor in the pi couldn’t really support more than 640 x 480 streaming resolution. Good luck!
When migrating servers it’s best to leave a few months overlap on your old hosting contract. It’s a pain to pay double for a while but it’s critical to preventing downtime.
The first thing to do is get all your files moved over to the new server and test to make sure everything is working the same. Once you are satisfied that your new server is operating properly you can do a “full test run” with the DNS server configurations.
On your old hosting remove the DNS A Records for your old hosting server. It will typically be in there by default. Add a new custom DNS A record pointing to your new server.
This effectively redirects all traffic from your old hosting to the copy on the new hosting. Sometimes it takes as much as 48 hours for these changes to go into effect but in my experience, 15 minutes is more reasonable. Now all the traffic is headed to your new server and since you tested ahead of time (right??) everything is working as it should be.
Now you can migrate your domain names over to the new hosting provider without fear of 48 hours of downtime when your site and apps will be unreachable.
Many people wont remember and maybe never knew about the Aero features in Windows 7. They didn’t add much functionality but they were essentially the beginning of the redesign we saw in Win 8 and has reached a polished state in Win 10.
You probably know of Alt+Tab as a shortcut to switch between active programs. This still works great in Windows 10. The new addition which adds a lot of value is Windows Key + Tab. This shortcut pulls up a new screen highlighting open windows on the screen they are active. If you’re using multiple monitors this could be a life saver! Use your monitors to organize your windows even when switching between tasks. See a Screen Shot Below!
Screen shot of the windows view with the new desktop feature
It’s actually very trivial for a user to get the Windows 10 update without having to wait for their reservation from microsoft.
To do so simply navigate to this page and follow the prompts.
Most Likely you will want to Download the 64 Bit Version. Once you have done so it will as you to select the correct Windows Option. Be sure to do this CORRECTLY. You can only update to the same version as you currently have. If you have Windows 8 Home then you need to stick with Home. Windows 8 Pro can upgrade to Pro. There are also options for Windows N or KN. If you’re in the US these wont apply to you. They are special versions of Windows because various countries have forced Microsoft to remove features from Windows. Just get the normal Windows 8 Pro or Home and you’re off!
Welcome to “It Can Be Done” the blog. I like to think that anything can be achieved and if we all felt so empowered the world would be a better place for it. Why wait around for the problems and challenges in your life to go away. Take life by the circular saw and build something to benefit yourself. I’ve been doing this privately for some time and I’ve decided to share some of the more interesting and accessible examples here.
Most people assume that the products they purchase come from some mythical repository of products somewhere. In reality they are made by normal people with day jobs. While many of these professionals have specialized skills, you too can learn to do things. While the scale of mass production can be daunting, sites like Etsy.com and Instructable.com suggest that normal people can take control of their needs and provide for themselves and those around them. The purpose of this blog is to highlight some of the ways that I have been able to do that.
Here, in this small corner of the internet, I make no effort to stay on theme or even in the realm of reason. I will, however, make every effort to be informative and helpful. I hope you find something interesting within these pages.