Tag Archives: raspberry

Raspberry Pi 3 A+ VS 3 B+ | compare the raspberry pi 3 a + to the 3 B +

The new Raspberry Pi 3 A+ was just released, basically its a cut down version of the 3 B+.

Here is a comparison between the two.

 

  RPi3A+ RPi3B+ Difference
CPU BCM2837B0 1.4GHz BCM2837B0 1.4GHz Same
Memory 512MB 1GB -512MB
Network Wifi, Bluetooth Ethernet, Wifi, Bluetooth -Ethernet
Size 65mm x 56mm 85mm X 56mm -20mm Shorter
USB Ports 4 1 -3

 

Dump1090 to MySQL Script | send flight data from dump1090 to mysql

I wanted a script which would read all the live dump1090 aircraft data and log it to a mysql database.

This base script does it, it will dump all the data to Mysql every minute.

It will start the dump1090 server and kick off a process which reads/sorts and inserts.

 

SD Card review on the Raspberry Pi | Improving the raspberry pis performance with different storage cd card

I was running Nextcloud on a Raspberry Pi zero w, the performance is not there.

I ran top to determine the IO Wait times, it was high. High enough that the performance would be impacted.

I ran a test on two different cards.

The is a Sandisk Ultra 16gb ($9) and the Sandisk Extreme Pro 128gb ($120), looks like the price does not improve performance on the raspberry pi Zero. I will write another article when I test the latest Raspberry Pi and see if the results change.

Sandisk Ultra

Sandisk Extreme Pro

 

Raspberry Pi 3 B+ and comparison with model 3B | raspberry pi 3 B+ improvements companison

The new Raspberry Pi 3 B+ has been release. Its the first release in a while.

I just wanted to highlight the major differences between the 3B and 3B+ models.

   3 B  3 B+
 CPU  1.2 GHz  1.4 GHz
 Wired  10/100BASE-T  10/100/1000BASE-T
 Wireless  802.11ac (2.4ghz)  802.11n (2.4ghz and 5ghz)
 Bluetooth  4.1  4.2

 

Raspberry Pi Postfix Courier-imap error | imapd: username: Account’s mailbox directory is not owned by the correct uid or gid

Im running postfix with courier-imap on a raspberry pi, got the following error, this is the fix.

Edit the imapd config file with the following command

Ensure the following is set to 0, its set to 1 be default.

 

Failed to unzip Raspberry Pi Zero image on OSX | failed to unzip raspberry pi zero zip on osx

I downloaded the latest image for my Raspberry Pi Zero and it started causing problems when trying to unzip it, its happened to me before but I thought Id make a post about it to avoid other search the net for hours before finding a solution.

I downloaded the following image.

When I tried to unzip it, it was renamed to this

Then I tried to double click on that and it was renamed to this.

So I realized I was going nowhere. The fix for this problem is listed below, fire up the terminal and execute the following command.

 

 

Done, enjoy.

The best Raspberry Pi Case Ever! | single unit raspberry pi case includes power

I have looked at a number of Raspberry Pi cases, they all have one thing in common. They have a box (the raspberry pi itself), a USB cable, and an adapter at a minimum.

I wanted to create a unit which will improve these shortcomings for three main reasons.

  1. To look cleaner, neater,  and safety.
  2. Can be installed on sites where you are completing a security audit, the unit will not come under suspicion because of it looks.
  3. Cooling, performance and the ability to expand hardware inside the unit itself.

I used FreeCAD to design the 3D printable design and a Dremel 3D20 printer to print it.

I have made around three designs which I improved on each time, landing on the one published here.

The print contains a space for a Samsung USB power plug and a section for the USB connector, it contains a grove to allow it to sit firmly in place.

The Raspberry Pi sits on four poles which hold it firmly in place, and also allows you to connect the cat5 connected and four USB ports at the bottom.

I have build three slits on the bottom of the cover and three at the top, this is a clever wait to passively cool the Raspberry Pi. The air inside will heat up and rise, then exit from this top slits. This will then create a suction from the bottom, taking in the cool air. No need for a fan! Test proved to be promising.

I am really pleased with the design and use it at home.

I have plans to make it alot smaller, as you can see from the photos the biggest problems are the size of the adapter and the plug into the Pi itself. I have ordered smaller and cheaper power plugs and some L shaped USB connectors. This will allow me to design the casing to be alot smaller, ill keep you posted.

To make this project happen you need the following

Enjoy!

Setting up nextcloud on a Raspberry Pi 1 | how to setup nextcloud on a raspberry pi

A quick and easy way to setup the a Raspberry Pi 1 with Nextcloud.

Nextcloud is an awesome solution for your personal cloud requirements. If will provide you with the following solutions.

  • Data storage accessible via an App or Webgui
  • Share your data with the internet, based on your permissions
  • Store and play music
  • Store and share contacts and calendars
  • Backup and sync with your phone or tablet
  • and many more

Lets gets started, lets install the dependencies.

Download Nextcloud from their site.

Create the data directory and set permissions.

Restart apache

Boom, your done. Point your browser to nextcloud and start to customize.