"Track and Trace" has got some attention in recent times here in the UK as the Covid-19 (Coronavirus) lockdown level looks to be relaxed. Part of the "Track and Trace" program is a mobile application that uses low energy bluetooth beaconing to see what other devices running the application have been close by. This has … Continue reading Python and Bluetooth – Part 1: Scanning For Devices And Services (Python)
I will hold my hands up here and admit, I am not great at advertising my website on social media. When posting a new blog post it auto generates a link on some social media sites for me, but I rarely ever repost links especially for my older blog posts. Today I am hoping to … Continue reading AutoTweeting WebLinks (Python)
Just a quick blog post about my favourite mini computer, the Raspberry Pi. This morning (Thursday 28th May 2020) the Raspberry Pi Foundation announced the launch of the 8GB Raspberry Pi 4 (official news here: https://www.raspberrypi.org/blog/8gb-raspberry-pi-4-on-sale-now-at-75/) to join the year old 4GB and 2GB Raspberry Pi 4* Alongside the news of the new Pi model … Continue reading Raspbian and Raspberry Pi OS (Raspberry Pi)
The Raspberry Pi is a fantastic computer and the GPIO (General Purpose Input / Output) pins allow for lots of a different hats, or phats (Pi Hats). I have used some of these options in past project (e.g. a temperature project, a countdown display) and installation of the hats is generally very easy, i.e. power … Continue reading Raspberry Pi Sense Hat (Raspberry Pi)
I've had a Raspberry Pi camera module (v1) since spring 2015, but I've rarely put it to use. With some spare time on my hands I have decided to see if I can build a camera feed on a webpage. Before I continue I should point out that if you are interested in using the … Continue reading Raspberry Pi Live Camera Webpage Feed V1 (Python / Raspberry Pi)
Towards the beginning of March 2020 raspberrypi.org released a tool to check the speed of a microSD card being used by the Raspberry Pi. The details for this tool, called "agnostics" can be found at https://www.raspberrypi.org/blog/sd-card-speed-test/ or if you want to install the tool then use sudo apt install agnostics . You may need to … Continue reading Raspberry Pi MicroSD Check Using Agnostics via CLI (Raspberry Pi)
What is tcpdump? TCP (Transmission Control Protocol) is a communication standard that devices use to talk establish communications between each other. The communication then takes place in packets. Normally a lot of the communication between devices is hidden away from us humans as we don't need to see our computer ask a DNS server for … Continue reading TCPDump (Raspberry Pi)
If you have multiple Linux devices (e.g. Raspberry Pis) you may find it helpful to set up an apt cache to help with updates, especially if you have a poor internet connection or limited data allowance. An apt cache works by caching (i.e. saving) all the updates on one device so that other devices can … Continue reading Using A Raspberry Pi As An Apt Cache (Raspberry Pi)
If you grew up in the early 90's you may remember computing magazines that came with game programming code typed up inside, so that you the reader could type it into your computer and play the game. I'll admit this was always a bit "hit and miss" when I attempted it, which could have been … Continue reading Code The Classics Volume 1 Review (Python)
If you have multiple Linux devices (e.g. multiple Raspberry Pi computers) and multiple user accounts that need access to those devices (i.e. maybe a Code Club of pupils) and want their own user accounts on the devices it could be a lengthy process managing the accounts and devices. Which is where Ansible (https://www.ansible.com/) comes into … Continue reading Using Ansible To Create And Manage Users (Linux / Raspberry Pi)
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