Does the BM2 battery monitor work with RoamVitals?

The small blue 12 V monitor sold everywhere under many labels. Its voltage sits behind an encrypted connection rather than in the broadcast.

Detected, decoding in progress

Not yet. The hub recognises the BM2 battery monitor but cannot decode its readings, so it will show up as a detected device with no data behind it.

Technical summary for BM2 battery monitor
Category	Power & Battery
Covers	BM2
How we see it today	Seen from its Bluetooth advertisement
What RoamVitals reads	Reported by the integration that reads this device.
How we know	Community-decoded, live confirmation pending
Plan needed	Free and above
Catalog rule	`BM2_BATTERY` Catalog 2026.07.5

Before you buy, read this:

Reading it needs a Bluetooth connection plus a key exchange, which is a different path from the passive listening the hub does today.

We are not recommending a purchase on the strength of this page. The hub recognises this device but does not decode its readings yet, so buying it today gets you a device RoamVitals can see and not much else.

Brand names are used here only to describe what RoamVitals reads. RoamVitals is not affiliated with or endorsed by Leagend.

Back to the full compatibility database

How this device fits into RoamVitals

The RoamVitals Hub sits in your rig, listens for Bluetooth sensors like this one, and sends their readings to a dashboard you open in any browser. No app store download, no pairing dance, and no separate app per brand. Put a Govee in the fridge, a Mopeka on the propane tank and a leak detector in the wet bay, and they all land on one screen.

Set a threshold on any reading and RoamVitals alerts you when it is crossed. See how it works, or browse the full compatibility database.

RoamVitals is a monitoring and convenience product. It is not a smoke, carbon monoxide, LP gas, security or medical device, and it must never replace certified life-safety equipment.

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