Mosquitto on Aayush Bajaj's Augmenting Infrastructurehttps://abaj.ai/tags/mosquitto/Recent content in Mosquitto on Aayush Bajaj's Augmenting InfrastructureHugoen© 2026 Aayush BajajWed, 20 May 2026 06:00:23 +1000Manjaro Raspberry Pi 4https://abaj.ai/wiki/csp/rpi/rpi/Fri, 09 Jan 2026 12:25:20 +1100https://abaj.ai/wiki/csp/rpi/rpi/<p>The Pi 4 is the daily driver of the two: an 8 GB aarch64 board running Arch Linux ARM (Manjaro flavour) on a 64 GB SD. It does triple duty — small i3 desktop on a 7&quot; DSI touchscreen, audio appliance via PipeWire + MPD + ncmpcpp + cava, and (post-2026-05-19) the smart-home + media role taken over from the RPI3.</p> <h2 id="hardware">Hardware<a href="#hardware" class="post-heading__anchor" aria-hidden="true">#</a> </h2> <ul> <li>Raspberry Pi 4B, 8 GB RAM, aarch64</li> <li>64 GB micro-SD root + 11 GB zram swap</li> <li>466 GB Samsung T5 portable SSD at <code>/mnt/media</code> (migrated from the <a href="https://abaj.ai/" >RPI3</a>)</li> <li>Official Pi 7&quot; DSI touchscreen, RPI wired keyboard, USB optical mouse</li> <li>Sonoff Zigbee 3.0 USB Dongle Plus V2 (CC2652P / CP210x bridge) on <code>/dev/ttyUSB0</code> — the Zigbee coordinator radio</li> </ul> <h2 id="os-kernel">OS / kernel<a href="#os-kernel" class="post-heading__anchor" aria-hidden="true">#</a> </h2> <ul> <li>Arch Linux ARM, kernel <code>6.6.33-2-MANJARO-RPI4</code></li> <li><code>systemd-networkd</code> + <code>iwd</code> + <code>dhcpcd</code> over Wi-Fi</li> <li>mDNS via <code>systemd-resolved</code>: reachable at <code>rpi.local</code></li> </ul> <h2 id="desktop-userland">Desktop / userland<a href="#desktop-userland" class="post-heading__anchor" aria-hidden="true">#</a> </h2> <ul> <li>i3-wm + polybar + picom + nitrogen + rofi + i3lock (configs live in <code>~rpi/.config/type-dots/</code> as a GNU-stow tree; X must be started as the <code>rpi</code> user, not root, or the wallpaper + polybar fail to load)</li> <li>Alacritty, Emacs 30, Chromium</li> <li>Audio stack: PipeWire + MPD 0.24 + Mopidy + ncmpcpp + cava + Icecast</li> </ul> <h2 id="services">Services<a href="#services" class="post-heading__anchor" aria-hidden="true">#</a> </h2> <ul> <li><code>sshd</code> (port 22), <code>minidlna</code> (port 8200, library at <code>/mnt/media</code>)</li> <li><code>docker</code> → compose stack at <code>/srv/homeassistant/</code>: <ul> <li>Home Assistant Container on <code>http://rpi.local:8123</code></li> <li>Eclipse Mosquitto MQTT broker on <code>:1883</code></li> <li>Zigbee2MQTT frontend on <code>http://rpi.local:8080</code>, driving the Aqara curtain via the Sonoff dongle</li> </ul> </li> <li><code>rtorrent</code> under systemd (tmux-wrapped, attach with <code>tmux a -t rtorrent</code>), watch dir <code>/mnt/media/torrents/watch/</code></li> </ul> <h2 id="mac-synced-sleep">Mac-synced sleep<a href="#mac-synced-sleep" class="post-heading__anchor" aria-hidden="true">#</a> </h2> <p>A Hammerspoon <code>hs.caffeinate.watcher</code> on the Mac SSHes to the Pi on system sleep / wake events and calls <code>/usr/local/bin/rpi-display {on,off}</code>, which toggles the DSI panel&rsquo;s DRM DPMS node plus the 7&quot; Touch Display backlight (<code>/sys/class/backlight/10-0045/bl_power</code>) and the framebuffer blank. The touchscreen wakes locally on tap; the network blank only fires on Mac state changes.</p>