I started exploring some IOT devices lately. For a while now I wanted to see how easy it is to build some sort of environmental controls and monitoring with a bunch of sensors. I still have some Raspberry Pies lying around doing nothing, so I thought using one of them for that purpose could be quite fitting. Given that the new generations of Raspberry Pies all come with WiFi and run Linux, it should be easy to process the signals and send them off to somewhere else to be stored or to further analyze them. So I started searching for sensors for Raspberry Pies. My goal was to find something that’s not too low-level on the hardware side but easy for others to replicate. After a while of research on the web, I found an interesting set of different Grove sensors from Seeed Studio. The senors are all cheap enough and Seeed Studio provides a rich set of libraries for all of them for Raspberry Pi. Seeed Studio was even kind enough to offer me a $30 voucher for providing reviews on my blog, which you can find in the blog posts at the bottom. The devices I was most curious about, at least to start with, were the Grove – Air quality sensor v1.3 and the Grove – Temperature & Humidity Sensor Pro. Seeed Studio also provides a Grove Base Hat for Raspberry Pi (or Raspberry Pi Zero) which makes it easy to connect the sensors with the GPIO from the Pi at the same time and without much hassle. In the next couple of blog posts, I will go over how I assembled everything together and share the results of my efforts. Stay tuned!
- How to mount a Grove Base Hat for Raspberry Pi
- How to use a Grove Temperature & Humidity Sensor Pro with a Raspberry Pi (coming soon)
- How to use a Grove Air quality sensor v1.3 with a Raspberry Pi (coming soon)
Use your computing power for the greater good
BOINC lets you help cutting-edge science research using your computer (Windows, Mac, Linux) or Android device. BOINC downloads scientific computing jobs to your computer and runs them invisibly in the background. It’s easy and safe. – https://boinc.berkeley.edu/
This is the entry paragraph on the Berkely University BOINC website. The BOINC software, short for Berkeley Open Infrastructure for Network Computing, can also be installed on Raspberry Pis, making your Raspberry Pi your own little science research station. This way you can help science projects such as SETI@home, Einstein@Home, Universe@Home, and many more.
Continue reading “Turning your Raspberry Pi into a science research station via BOINC”
Resizing a root partition (
/) of a running Oracle Linux isn’t hard but the information out there on the web is limited. In my situation, I was given access to an already installed Oracle Linux environment that wasn’t using all the available space of the disk. The root partition, formatted with the
btrfs filesystem, only used 4GB when 32GB were available in total.
Resizing the partition is done in two steps:
- Resizing the actual partition itself
- Expanding the filesystem on top of the partition
Continue reading “How to resize a btrfs root partition on Oracle Linux”
Get up and running with the free Oracle Database edition on Windows
In my previous post, I demonstrated how you can install Oracle Database 18c XE on Linux. In this post, you will learn how you can install Oracle Database 18c XE on Windows. I am performing the installation on Windows 10 but it should remain the same for all Windows versions.
Preparing for the installation
Before you can start the installation, you will have to download the Oracle Database 18c XE Windows installer zip file. Head over to https://www.oracle.com/technetwork/database/database-technologies/express-edition/downloads/index.html, click on “Accept License Agreement” and download the “Oracle Database 18c Express Edition for Windows x64” zip file.
Once you have downloaded the zip file, extract it anywhere.
Continue reading “How to install Oracle Database 18c XE on Windows”
In one of my past posts I showed how one can install Oracle Linux on a Raspberry Pi from a Mac via the command line. Luckily my colleague Philippe pointed out to me that things can be even much, much easier thanks to Etcher, an open source tool to flash SD cards and USB drives. Etcher is available for Mac, Linux and Windows, which should make the following steps generic.
- Download the latest Oracle Linux image for ARM
- Flash your SD card using Etcher
- Put the SD card into your Raspberry Pi and boot it up
Continue reading “How to install Oracle Linux on a Raspberry Pi – the easy way”