https://www.martinellis.me/tags/review/ Recent content in Review on Martin Ellis Hugo en-us © Martin Ellis. All rights reserved. Fri, 23 Oct 2026 00:00:00 +0000 https://www.martinellis.me/posts/2026/10/review-zigbee-24g-mmwave-radar-presence-motion-sensor/ Fri, 23 Oct 2026 00:00:00 +0000 https://www.martinellis.me/posts/2026/10/review-zigbee-24g-mmwave-radar-presence-motion-sensor/ <p>The radar-based presence sensor I was using in my office died<sup id="fnref:1"><a href="#fn:1" class="footnote-ref" role="doc-noteref">1</a></sup>, and I saw a cheap option while browsing AliExpress for some other bits for an upcoming project.</p> <figure><img src="https://www.martinellis.me/posts/2026/10/review-zigbee-24g-mmwave-radar-presence-motion-sensor/images/ms01_hu_17e5e20bc8aad2fa.webp" srcset="https://www.martinellis.me/posts/2026/10/review-zigbee-24g-mmwave-radar-presence-motion-sensor/images/ms01_hu_93c97a1134abc000.webp 320w, https://www.martinellis.me/posts/2026/10/review-zigbee-24g-mmwave-radar-presence-motion-sensor/images/ms01_hu_17e5e20bc8aad2fa.webp 480w, https://www.martinellis.me/posts/2026/10/review-zigbee-24g-mmwave-radar-presence-motion-sensor/images/ms01_hu_cc8e6a0db83d2280.webp 556w" sizes="(max-width:760px) calc(100vw - 32px), 720px" alt="A small white pill-shaped sensor on a wooden table, with a grey icon of a walking figure and radar waves on its face, a pinhole near the bottom and a small hole in the end." width="556" height="739" style="--bg:#956528" decoding="async"><figcaption> <p>The MS01, in what looks like the same case as my IR blaster</p> </figcaption> </figure>