https://www.jwhitham.org/ Site updates https://www.jwhitham.org/2025/07/buildroot-for-more-reliable-pi.html Wed Jul 16 23:40:00 2025 This article is about using Buildroot to create more reliable firmware for Raspberry Pi-based embedded systems. The context is a home automation system that also handles network infrastructure tasks.... bba8c030ad6951807cca7aebb6ee8841 https://www.jwhitham.org/2025/07/gps-elevation.html Thu Jul 3 00:20:00 2025 I like climbing hills and mountains, particularly in the Lake District , and whenever I go there with my wife and dogs, we try to go somewhere new. A decent map is valuable, and so I've been using the... 8205f505df25b9d4efda8197b302e72e https://www.jwhitham.org/2025/03/pico-wifi-settings.html Thu Mar 27 17:50:00 2025 Today I have released the first version of pico-wifi-settings . This is a library for Raspberry Pi Pico W devices which manages WiFi connections for a Pico application. It exists because I developed t... f59b9ef39238861c6aef8354b98f1ea0 https://www.jwhitham.org/2025/01/rpi-pico-w-2-and-jlink-edu-setup.html Wed Jan 29 19:30:00 2025 Another project involving a Raspberry Pi Pico 2 has led me back to this article from last year about setting up a Segger J-Link "EDU Mini" debugger. The instructions were useful to some other people,... 1b7a4eac3ee1aa42f930ba5100042d5e https://www.jwhitham.org/2024/12/attiny85-christmas-tree.html Thu Dec 5 21:25:00 2024 Over a few years I've built various electronic projects involving RGB LEDs. These LEDs are controlled using a serial protocol which allows them to be set to any colour. The most famous LEDs of this so... 006fa0db51a9e47dd4ed7fccbd062a46 https://www.jwhitham.org/2024/04/vrrp-router-keepalived.html Sat Apr 6 15:50:00 2024 This is a three-part article about a project to set up a home network with redundant network connections. Here are the parts: Part 3 The final step in my router configuration was to set up VRRP . keep... 0916756ddf922f0157595e45c5aef6c5 https://www.jwhitham.org/2024/04/ipv6-router-linux.html Sat Apr 6 15:45:00 2024 This is a three-part article about a project to set up a home network with redundant network connections. Here are the parts: Part 2 I am fortunate to be with one of the few UK ISPs that actually supp... 3330aa735d6181bd7e43f24d142c460e https://www.jwhitham.org/2024/04/pppoe-mtu.html Sat Apr 6 15:40:00 2024 I read about the Virtual Router Redundancy Protocol (VRRP) and wanted to set up my home network so that a fibre outage would cause a transparent switch to an alternative connection via the mobile netw... 1a3e721fc0d9a31c106012a2a2cda4d2 https://www.jwhitham.org/2024/02/rpi-pico-w-and-jlink-edu-setup.html Wed Feb 7 20:00:00 2024 Edit: Updated version of this article , also covering Pico 2 and with more detail about GDB. At home, I have been working on a project involving Raspberry Pi Pico W . It's a microcontroller board, som... d6b97cf2766d98df873e08cde4fcd688 https://www.jwhitham.org/2023/11/linux-shell-serial-port.html Mon Nov 28 19:00:00 2023 I wanted to be able to log in to my Linux desktop PC via a serial cable . SSH is the obvious way to connect to a Linux PC from elsewhere, but this is only possible when a network connection can be est... 8ace8d29661520b02242f3e226cd561a https://www.jwhitham.org/2023/09/system-shock-soundtrack-gapless.html Sun Sep 3 22:10:00 2023 On many (music) albums, each track is supposed to play directly into the next, with no gap. Silence between tracks can be created deliberately when the album is produced, but this is not required. Gap... 6cf789421c21283db43160ae6e0b014f