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Category: Research and Development

Scheduled vs Supervised Tasks

Scheduled vs Supervised Tasks

Scheduling tasks in Linux is traditionally done with the Cron Task Scheduler.  There are many online resources about cron, one of which is this site, https://www.vultr.com/docs/how-to-use-the-cron-task-scheduler/.  With Webmin, the task scheduling can be managed through the WebUI.  Details can be found here, https://doxfer.webmin.com/Webmin/Scheduled_Cron_Jobs.   Here is a simple scheduled task that reboots the Linux host daily at 1:30am. 30 1 * * * systemctl reboot -i Scheduling this in Cron or through Webmin results in the same entry in the respective…

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MicroSD Backups with Encryption that Save Space

MicroSD Backups with Encryption that Save Space

This post will cover steps on how to create and secure MicroSD backups, with the focus being on disaster recovery for RPi systems.  This method of backup is hardly the best method available, but it does offer space savings and more security.  In this demonstration, a second Linux system will be used as the backup target with the MicroSD media attached as the backup source. First step is to establish how large the MicroSD media is and if the target…

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Visualizing Data with Processing

Visualizing Data with Processing

The purpose of this post is to demonstrate how to use Processing to present data in a visual way. The methods used in this post will be based on the work done by M.Furkan Bahat. Source – https://mfurkanbahat.blogspot.com/2014/11/artificial-horizon-and-compass-using.html The hardware used in this demonstration will be the following: GY-521 MPU6050 Arduino Uno ESP32-Cam ESP32-USB-Module Patch wiring USB cables Windows 10 laptop The MPU6050 is connected to the Arduino Uno using the following pin connections, as shown in the images below….

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