Apollo MSR-2

Apollo MSR-2

Launch Year: 2024

Model: ld2410

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Our review

Apollo MSR-2 Review: An LD2410 mmWave Presence Sensor Built for Home Assistant

Radar presence detection plus a light sensor over Wi-Fi, aimed squarely at local automations rather than voice assistants.

The verdict

The Apollo MSR-2 is a compact mmWave presence sensor built on the LD2410 radar module, designed to tell a room whether someone is actually in it rather than whether something just moved. It pairs presence detection with an ambient light reading, runs on USB-C over 2.4 GHz Wi-Fi, and integrates with Home Assistant, which is the only supported platform. For anyone tired of lights switching off while they sit still, that combination is the whole point. It does not do multi-person tracking, fall detection or sleep monitoring, so treat it as a presence and light sensor rather than a full radar suite.

Best for
  • Home Assistant users
  • Occupancy-based lighting
  • Desk and sofa automations
  • Replacing PIR sensors

Pros

  • mmWave presence detection catches people who are present but still
  • Built on the well-known LD2410 radar module
  • Ambient light sensor for smarter lighting rules
  • Presence alerts and automation support
  • History records for occupancy patterns
  • Simple USB-C power
  • Native Home Assistant integration

Cons

  • Home Assistant only: no Alexa, Google Home, HomeKit, SmartThings, IFTTT or Matter
  • No multi-person detection
  • No fall alerts or sleep monitoring
  • Detection range, angle and area are not documented
  • Wired over USB-C with no battery option
  • Indoor only, with no weather resistance rating

Who is the Apollo MSR-2 for?

It is for the Home Assistant user solving the classic PIR problem: a passive infrared sensor only sees movement, so the lights go out while you read, work or watch television. mmWave radar detects a person who is present but still, which is what makes presence-based automations feel reliable instead of annoying. Home Assistant is the only supported platform here, so this is a device for local automation rather than for Alexa or Google Home routines.

What the MSR-2 does

Two readings drive everything. Presence detection, from the LD2410 mmWave radar, reports whether the space is occupied and can raise presence alerts to trigger automations. The ambient light sensor adds the other half of a good lighting rule: turn the light on when someone is present and it is actually dark, rather than at midday. History is recorded, so occupancy patterns stay visible over time, and automations are supported directly. Power is USB-C, so it can run off a phone charger or a USB port near where it is mounted.

What to know before you buy

Home Assistant is the only integration: Google Home, Alexa, Apple HomeKit, SmartThings, IFTTT and Matter are all unsupported. On the radar side, this is single-target detection, with no multi-person tracking, no fall detection and no sleep monitoring, so it will not count people in a room or watch over an elderly relative. The detection area, angle and range are not documented for this model, which matters because mmWave sensors are very placement-sensitive: expect to spend time positioning it and tuning thresholds. It is a wired device on 2.4 GHz Wi-Fi with no battery option, and it has no weather resistance rating, so it stays indoors.

Is the Apollo MSR-2 worth it?

It sits at a modest price for what mmWave sensors typically cost, and it targets the one automation everybody wants to get right. If you run Home Assistant and have a room where the lights keep dying on you, it addresses that directly and adds the light reading you need to do it properly. If you want Alexa or Google Home support, or you need multi-person or fall detection, this is not the sensor to buy.

Frequently asked questions

How is the Apollo MSR-2 different from a motion sensor?

It uses mmWave radar rather than passive infrared, so it detects a person who is present but not moving. A PIR sensor only reacts to movement, which is why PIR-driven lights switch off while you sit still.

Does the MSR-2 work with Alexa or Google Home?

No. Home Assistant is the only supported platform.

Can it track more than one person?

No. Multi-person detection is not supported, and neither is fall detection or sleep monitoring.

Does it have a light sensor?

Yes. Alongside presence, it reads ambient light, which lets automations account for how bright the room already is.

How is it powered?

Over USB-C, on 2.4 GHz Wi-Fi. There is no battery option, so it needs to be mounted within reach of a USB power source.

At a glance

Summary

Everything this presence sensor supports, grouped by category.

Power
Wired (USB-C)
Connectivity
2.4 GHz WiFi
Integrations
Home Assistant
Sensors
PresenceLight
Alerts
Presence Alerts
Features
History Records

Price History

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Company
Apollo Automation logo

Apollo Automation

USA flagHeadquartered in USA

Apollo Automation is a smart home maker focused on local, privacy-first sensors built around ESPHome and Home Assistant. Its lineup includes mmWave presence and motion multisensors, air quality monitors tracking CO2, VOCs, temperature and humidity, plant and leak sensors, plus hubs and accessories. Apollo emphasizes open-source software and 3D-printable, customizable hardware with onboard buzzers and RGB LEDs, and runs with no cloud and no subscription. Devices are Made for ESPHome and Works Locally with Home Assistant certified, appealing to users who want affordable, fully local automation.

Full specifications

Every spec, organized

Browse the full breakdown by category. Tap the on any row for what it means, or the for sources and documentation.

Size & Materials
Weather Resistance

NO

Dimensions

?

Weight

?

Power
Wired

USB-C

Connectivity
2.4 GHz WiFi

YES

5 GHz WiFi

NO

Bluetooth

NO

Z-Wave

NO

Zigbee

NO

Thread Protocol

NO

Integrations
Google Home

NO

Alexa

NO

Apple HomeKit

NO

Samsung SmartThings

NO

Home Assistant

YES

IFTTT

NO

Matter

NO

Sensors
Presence

YES

Light

YES

Alerts
Presence Alerts

YES

Fall Alerts

NO

Features
Multi-Person Detection

NO

Area of Detection

?

Angle of Detection

?

Range of Detection

?

Automations

YES

Zibgee Router

NO

History Records

YES

Sleep Monitoring

NO

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