How it works

A small disc on the ceiling.

Each Wellytic sensor is about the size of a smoke detector. It mounts to the ceiling, casts a quiet cone of radar awareness across the room below, and reports presence and activity to your phone. Fifteen minutes per room.

The sensor

Wellytic uses 60 GHz mmWave radar (DFRobot C1001 reference module) for primary rooms and 5.8 GHz radar (DFRobot SEN0521) for bathrooms with high water reflectivity. Both are consumer-class radar modules operating well within FCC/IC emissions limits.

  • Frequency. 60 GHz mmWave (primary); 5.8 GHz (bathroom). No optical or audio sensing.
  • Form factor. Approximately the size of a smoke detector. Off-white, low-profile, ceiling-flush.
  • Signal type. Phase and Doppler. The sensor sees motion signatures, not images.

The mount

  • Two screws or a damage-free adhesive mount. The mount kit ships with both options.
  • 2.4 to 3.0 meter ceiling height for living spaces. Up to 3.2 m for tall ceilings; below 2.4 m the cone is too narrow for full-room coverage.
  • Ceiling-flush only. Wall-mounting is not supported; the cone geometry assumes a top-down field.

Coverage

  • 6 m by 6 m cone at 2.4 to 3.0 m height. Adequate for the typical North American bedroom, living room, or large bathroom.
  • One sensor per room. Walls and large furniture block the radar signal; this is part of why room privacy holds.
  • High-risk rooms can use multiple sensors. A long open-plan kitchen or a multi-zone living room may call for two sensors covering complementary cones.

Power

  • USB-C wired. The default. The cable tucks along the ceiling molding to the nearest outlet.
  • Battery. Optional. Long-life lithium primary; runs 12+ months per charge under typical room use. Ideal for rentals or rooms without nearby outlets.

Network

  • Each sensor reports to a small gateway (about the size of a paperback) over a low-power 802.15.4-class radio. The gateway is the only device that touches your home Wi-Fi.
  • If your internet is out, local detection continues. Falls and lack-of-motion alerts still fire on the gateway. When the connection comes back, the cloud sync catches up.

The fifteen-minute install

  1. Unbox. Each sensor is smoke-detector sized. Gateway is paperback-sized.
  2. Mount to the ceiling. Two screws, or the damage-free mount. Sensor sits flush against the ceiling, facing down.
  3. Plug in power. USB-C cable tucks into ceiling molding, or use the battery option.
  4. Connect the gateway to Wi-Fi. Scan the QR code on the gateway with the app. Under a minute.
  5. Calibrate the room. Stand in the room for 30 seconds while the sensor learns the geometry. Done.

The sensor itself does not log to your home network or contact the cloud. All cloud uplink goes through the gateway, which is the single point of authentication and signing. See /privacy for the data-flow picture.

The app

The app is glance-readable. One screen, one answer: is the person you care about okay? Yes or no. Detail is one tap away.

Available on iOS and Android. Up to four family members can be invited per household at the standard subscription tier.

What about pets?

Small pets (under approximately 12 kg) are below Wellytic's posture threshold and are filtered out. Large dogs may produce activity signals; the app shows when this is happening so you can tune the room.

What about non-radar interference?

Wellytic does not interfere with other wireless devices in normal home environments. mmWave radar at consumer power levels is well below the threshold that would affect Wi-Fi, cellular, Bluetooth, or hearing aids. Pacemaker safety is verified per consumer-radar standards; check with your device manufacturer if you are unsure.

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