Our take on the Dope Human mmWave Sensor 24 GHz 2-Pack

The Dope HMMD is a 24GHz FMCW radar module that detects moving people, micro-motion and stationary presence in real time. An onboard MCU runs the detection algorithms and reports status over UART at 115200bps, with optional GPIO for Raspberry Pi, Pi Pico, Jetson Nano, ESP32 and Arduino. It is a bare 20×20mm board at 3.3V and about 50mA, so it suits makers building presence-triggered automation rather than plug-and-play buyers. Against PIR sensors it sees still people and works through plastic, but it needs wiring, code and a host board, and its 0.7m distance resolution is coarser than pricier radar modules.

Best forMakers building presence-based home automationESP32, Pi or Arduino projects needing a UART sensorSecurity and occupancy triggers that must catch still peopleBuyers who want two identical modules for testing

Pros

Detects micro-motion and standing humans, not just movement
UART and GPIO outputs with onboard detection algorithms
Configurable sensing distance, sensitivity and absence delay
Small 20×20mm board with wide ±60° detection angle
Works with common boards: ESP32, Pi, Pico, Jetson Nano, Arduino

About the Dope Human mmWave Sensor 24 GHz 2-Pack

This is a two-pack of HMMD-mmWave-Sensor modules. Each is a compact 24GHz FMCW radar that detects moving, micro-motion and standing humans in real time. It is meant for AIoT smart home, security and automation projects.

Each module has an onboard MCU with built-in detection algorithms. It reports status over UART, with optional GPIO output. It works with Raspberry Pi, Pi Pico, Jetson Nano, ESP32 and Arduino.

Sensing distance, sensitivity and absence report delay are configurable. The sensor can be mounted on a wall or on top (ceiling).

Modulation

FMCW

Frequency band

24~24.25GHz, bandwidth 0.25GHz

Power supply

3.3V

Output

UART and GPIO

UART baud rate

115200bps (default)

Operating temp

-40~85°C

Dimensions

20×20mm

Range, wall-mounted

Questions and answers

What can this sensor detect that a PIR sensor cannot?

It uses FMCW radar to pick up moving people, micro-motion such as breathing or typing, and standing humans. PIR sensors typically only react to movement, so they miss someone sitting still.

What boards can I connect it to?

It outputs over UART at 115200bps with optional GPIO, and is listed for Raspberry Pi, Pi Pico, Jetson Nano, ESP32 and Arduino. You supply the 3.3V power and the code that reads the status.

How far does it detect people?

Wall-mounted, it reaches about 10m for moving targets and 6m for micro-motion. Top-mounted, the ranges are about 5m and 4m, with a ±60° detection angle.

Is it plug-and-play?

No. It is a bare 20×20mm module with no enclosure or cables, so you need to wire it to a host board and write or load firmware to use the UART output.

Can I adjust how sensitive it is?

Yes. Sensing distance, sensitivity and the absence report delay are configurable, so you can tune when it reports a room as empty.

What is in the box?

Two HMMD-mmWave-Sensor modules. Nothing else is listed, so plan on your own wiring and a 3.3V supply.

Dope Human mmWave Sensor 24 GHz 2-Pack

Last price we saw

$49.95at VXB.com Bearings, last seen Oct 31

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Price facts

Last seen at $49.95 at VXB.com Bearings on Oct 31.

Our take on the Dope Human mmWave Sensor 24 GHz 2-Pack

Pros

Detects micro-motion and standing humans, not just movement
UART and GPIO outputs with onboard detection algorithms
Configurable sensing distance, sensitivity and absence delay
Small 20×20mm board with wide ±60° detection angle
Works with common boards: ESP32, Pi, Pico, Jetson Nano, Arduino