sensor
Waveshare HMMD mmWave sensor (S3KM1110, 24 GHz)
Waveshare's 20 × 20 mm human micro-motion radar module, built on the S3KM1110 24 GHz FMCW radar chip. It detects moving, micro-moving and stationary people and talks over UART (115200 baud by default) with a GPIO presence output. Runs from 3.3 V.
Specifications
| Chip | S3KM1110 |
| Band | 24–24.25 GHz FMCW |
| Interface | UART (115200) + GPIO |
| Supply | 3.3 V (3.0–3.6 V) |
| Size | 20 × 20 mm |
| Average current | 50 mA |
Projects Using Waveshare HMMD mmWave sensor (S3KM1110, 24 GHz)1
Illustration
ESP32ESP32-C3
A local presence sensor on a Waveshare ESP32-C3-Zero: an HMMD mmWave radar sees even a person sitting still, plus temperature, humidity and light, a browser panel and optional Home Assistant over MQTT. No licence in the repo.
Intermediate
6 parts listed
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