Is the MSR-2 worth it over the MSR-1?

The MSR-2 is about 30% smaller, uses updated sensors and adds an extra expansion slot. If size or expansion matters, it is the better pick; otherwise the radar and core sensor set are similar.

Does it need Home Assistant?

Yes. It is an ESP32 device designed to report into Home Assistant, and the Bluetooth tracker needs YAML configuration. It is not a standalone consumer sensor.

Can it detect more than one person?

No. The HLK-LD2410B tracks a single target, so it reports presence for one person at a time. Busy rooms with several people are better served by multi-target radar.

What is the radar range?

About 6 meters (19.7 feet), with a 0.75 m gate size. Large or L-shaped rooms may need a second unit.

Only if you choose the SCD-40 CO2 option. That sensor gives true CO2 readings rather than an estimate.

The assembled sensor in its case and an Apollo sticker. Power supply and mounting hardware are not listed.

What do buyers say about the Apollo Automation MSR-2?

Buyers like: Works flawlessly for zone lighting and presence control; Easy setup with a plethora of options and settings to dial in; Small size and great functionality with Home Assistant.

Apollo Automation MSR-2

Last price we saw

$37.99at Apollo Automation, last seen Oct 31

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Our take on the Apollo Automation MSR-2

The Apollo Automation MSR-2 is a small ESP32-based multisensor for Home Assistant, built around an HLK-LD2410B mmWave radar for presence detection plus light, UV, temperature and pressure sensors. It adds an optional SCD-40 true CO2 sensor and an ESP32-C3-Mini Bluetooth tracker, and it is about 30% smaller than the MSR-1. It is a DIY-friendly, locally controlled device rather than a plug-and-play consumer gadget. No current price was provided, so check the live comparison for where it sits against its recent range.

Best forHome Assistant users who want local presence detectionRoom-level zone lighting and automationsBuyers who want CO2, light and climate data in one device