# Bosch Door/Window Contact II [+M]

Bosch Door/Window Contact II [+M] is a flexible contact sensor for buyers who want either direct Matter setup or Bosch Smart Home services. It is strongest when the automation has a clear job, such as heating pause or entry alerts, and weaker if you expect Bosch's alarm behavior to become identical inside every Matter ecosystem.

Canonical page: https://matterhome.io/devices/bosch-door-window-contact-ii-m
Markdown page: https://matterhome.io/devices/bosch-door-window-contact-ii-m.md

## Device Facts

- Brand: Bosch
- Model: Door/Window Contact II [+M]
- Product type: Contact Sensor
- Category: Sensors
- Connection: Matter over Thread
- Matter status: Bosch lists Door/Window Contact II [+M] as a direct Matter-capable [+M] contact sensor for either Matter systems or Bosch Smart Home.
- Launch date: 2025
- Thread border router required: Yes
- Brand hub required: No
- Typical price range: EUR40-EUR60
- Review status: Compatibility guide
- Product image: https://matterhome.io/content-assets/devices/bosch-door-window-contact-ii-m/product.jpg
- Product image alt text: Bosch Door/Window Contact II [+M]
- Product image source: https://webservices.bosch.com/RB.HOME.AdaptiveImage/remote/www.bosch-smarthome.com/res/web/produkt/tfk2/bild/TFKII_M_ShoppingModul_1.jpg

## Ecosystem Support

- Apple Home: Supported
- Google Home: Supported
- Alexa: Supported
- SmartThings: Supported
- Home Assistant: Supported

## Best For

- Open-close automations on doors, windows, cabinets, and mailboxes
- Heating pause routines with Bosch radiator thermostats
- Bosch Smart Home users who may later move the sensor to direct Matter

## Skip If

- You do not have Thread coverage or a Bosch controller path
- You need Bosch alarm services entirely inside a third-party Matter app
- The mounting location has metal or deep frames that block reliable radio performance

## Setup Notes

- Pair directly to a Matter ecosystem when you only need open-close state.
- Pair through Bosch Smart Home Controller II when you want Bosch alarm, heating pause, and Bosch app services.
- Test the sensor on the actual frame before committing to adhesive placement.

## Known Limitations

- Matter exposes the core contact state; Bosch-specific button actions and service behavior may not carry over.
- Metal frames, deep recesses, and weak Thread coverage can hurt reliability.
- Regional availability is tied to Bosch Smart Home markets.

## Pros

- Direct Matter contact sensor option
- Can also be used in Bosch Smart Home
- Useful for heating pause, security, and basic open-close automations
- Includes an integrated button for Bosch Smart Home actions

## Cons

- Needs Thread coverage for the direct Matter path
- Bosch alarm and heating services need Bosch Smart Home
- Contact status is simpler in Matter than in Bosch's own app

## Sources

- https://www.bosch-smarthome.com/de/de/kompatibilitaet/matter-standard/
- https://www.bosch-smarthome.com/de/de/produkte/heizung/tuer-fensterkontakt/
- https://webservices.bosch.com/RB.HOME.AdaptiveImage/remote/www.bosch-smarthome.com/res/web/produkt/tfk2/bild/TFKII_M_ShoppingModul_1.jpg

## A simple sensor with two personalities

Door/Window Contact II [+M] can report open or closed state directly to a Matter ecosystem, or it can live inside Bosch Smart Home. The hardware is useful either way, but the experience changes depending on the setup path.

Direct Matter is the cleaner route for simple automations: turn on a light, trigger a notification, or pause a thermostat when a window opens. Bosch Smart Home is the better route when the contact sensor is part of Bosch's alarm system, heating routines, or app-specific button actions.

## Setup path

For direct Matter setup, use a Matter controller with Thread border router support. Place the sensor where Thread coverage is reliable before sticking it down, especially on exterior frames.

For Bosch Smart Home setup, pair it with Smart Home Controller II. From there it can participate in Bosch services and, where supported, be bridged outward to another Matter ecosystem.

## Where it fits

It makes the most sense when it has a named job. A bedroom window can pause a radiator valve. A hallway door can turn on a light. A cabinet or mailbox can send a simple open-close event.

Do not treat it as a complete security system by itself. Matter can expose contact state, but alarm modes, service rules, and notification behavior depend heavily on the app handling the sensor.

## Should you buy it?

Buy Door/Window Contact II [+M] if you want Bosch hardware with a direct Matter option. Skip it if your setup depends on Bosch's full alarm or heating services appearing unchanged in a non-Bosch Matter app.