Quick answer
Choose SwitchBot Meter Plus for an easy-to-read room thermometer or a Bluetooth temperature input for Home Assistant. You do not need a SwitchBot Hub for that local integration. Buy a hub only for the SwitchBot remote features you actually want. One meter measures one location; comparing two rooms needs two separate readings.
Product snapshot
- Brand: SwitchBot
- Model: Meter Plus, white, one pack
- ASIN: B09QBR7XJD
- Display: 3-inch temperature and humidity screen
- Connection: Bluetooth; remote SwitchBot app alerts require a compatible SwitchBot Hub
Disclosure: As an Amazon Associate I may earn from qualifying purchases.
Price snapshot. Amazon offer may differ.
Three ways to use it, with different hardware needs
Read the room without opening an app. The large screen is the main reason to choose Meter Plus over a tiny hidden sensor. Put it where you can read it from your normal sitting or standing position. The selected one-pack listing includes a single meter, not the phone or hub shown in some promotional images. A hub is unnecessary if checking the local display is the whole job.
Keep temperature history on your phone. The selected listing offers Bluetooth app access, onboard records for up to 68 days, and up to two years of in-app storage with CSV export. That is useful when you want to compare how a bedroom feels in the morning with how it feels late in the afternoon. A record collected over several days is more informative than buying equipment in response to one uncomfortable moment.
Use readings in Home Assistant. The SwitchBot Bluetooth integration lists Meter Plus as supported and does not require a SwitchBot Hub. Home Assistant still needs working Bluetooth coverage. Its Bluetooth documentation covers local adapters and remote Bluetooth proxies. A server sitting in a cabinet on another floor is not, by itself, evidence that the meter will be reachable.
Will one meter answer your room-temperature question?
If you simply want to know whether the upstairs bedroom is warmer than it was yesterday, one meter is enough. If you want to compare upstairs with downstairs at the same time, you need a reading from each location. That could mean two meters, or one meter alongside an existing temperature source that your chosen system can actually read.
Moving one meter between floors is useful for a rough check, but it does not produce simultaneous measurements. Heating, sun exposure, open doors, and occupancy can change while you move it. Before buying several units, decide which rooms represent the places you occupy rather than treating every shelf or landing as a separate measurement point.
For a fair comparison, place the meters away from direct sun, supply vents, cooking heat, and the exhaust of a computer. Start with them near each other to see how their readings compare, then move them to their intended locations. These placement checks are practical setup advice, not a claim that we have independently tested this unit’s accuracy.
A sensor is not a thermostat controller
Meter Plus reports room conditions. It does not directly switch a furnace blower, add HVAC zones, or make another thermostat expose all of its remote sensors. A Home Assistant automation needs both usable temperature inputs and a separately supported control path for the equipment it will operate.
That distinction matters if your goal is to run a fan when two floors differ in temperature. First confirm that the thermostat or fan can be controlled as intended. Then confirm that both readings arrive reliably. Buying more sensors before checking the control side can leave you with a useful dashboard but no working automation.
If you have not chosen a controller yet, our Home Assistant controller versus first-device guide helps separate a simple room check from a larger automation project. The meter is easier to justify when you already have a clear job for its data.
Adding presence sensing as well as temperature? The Home Assistant Green and FP300 first-room guide covers a different sensor and radio decision. Meter Plus is a temperature and humidity device, not a substitute for a presence sensor.
When a SwitchBot Hub is worth adding
The selected listing requires a SwitchBot Hub for remote push notifications through the SwitchBot system. That is a different purchase from direct local Bluetooth integration with Home Assistant. Choose the path before adding accessories to your cart: local display, nearby phone access, remote SwitchBot alerts, or Home Assistant automation.
If you already run Home Assistant, try its supported Bluetooth path first. If you do not want to maintain an automation server and prefer SwitchBot’s app, a compatible hub may be the simpler remote-access route. Neither option removes the need to check reception at the intended sensor location.
Best fit
You want a visible temperature and humidity reading plus the option to log data or use it in a supported Bluetooth setup.
Skip it if
- You only need a glance at the temperature: A simpler thermometer may be enough if you will not use history or connected features.
- Your existing sensor network already does the job: Adding Bluetooth may introduce an unnecessary receiver or coverage problem.
- You expect an HVAC fix: Readings can reveal a pattern, but they do not establish why a room is uncomfortable or correct ductwork and equipment problems.
FAQ
Is a SwitchBot Hub required for Home Assistant?
No, not for the documented direct Bluetooth integration. Working Home Assistant Bluetooth coverage is required instead. SwitchBot’s own remote app features have different requirements.
Does the one-pack include a hub?
No. This selected variant is one white Meter Plus. Amazon also shows other configurations and bundles; the price card here is for the single meter.
Should I buy two immediately?
Only if you need two simultaneous room readings and do not already have a usable second source. For a first installation, one meter lets you check display placement, app use, and reception before expanding.