Distance and Speed from a Radar Echo: Two Equations, and What the Module Datasheets Publish A radar echo carries two kinematic quantities: range — how far away the reflecting target is — and radial velocity, the component of the target's motion alo...

Updating Radar Firmware Without a Cloud: Self-Hosted OTA over MQTT Most connected devices want you to push firmware through somebody's cloud. These do not ask for that. The sleep and fall radars fetch an image from a URL you hand them, and the comma...

title: "Online Says It's Connected, HeartBeat Says It Works: Reading Two Status Signals Instead of Guessing From Silence" published: true tags: iot, mqtt, radar, monitoring canonicalurl: https://249263431.github.io/60GHz-Radar-SDK/guide/2026/10/27/o...