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Athom Tech

BTHome Door Contact with Temperature and Humidity Sensor

BTHome Door Contact with Temperature and Humidity Sensor

$14.99 USD
$14.99 USD
Sale Sold out

Smart Door & Window Contact Sensor (BTHome)

Bluetooth Low Energy (BLE) contact sensor with native BTHome v2 plus built-in temperature & humidity. Automatically discovered in Home Assistant via ESPHome Bluetooth Proxy. Runs ~1–2 years on 2 × AAA (batteries not included).

Highlights

  • Encrypted BTHome broadcasts for privacy
  • BLE 5.0 with deep-sleep < 6 µA
  • Magnetic reed switch — response < 100 ms
  • Built-in SHT40 sensor for accurate T&H
  • Pre-applied 3M adhesive for quick installation

Ideal Use Cases

  • Door & window security automations
  • Turn lights on when door opens
  • Fridge / freezer door alerts
  • Cabinet or office access tracking
  • Room or storage climate monitoring
Tip: For best stability, use an ESPHome Bluetooth Proxy with Ethernet. Add: 
esp32_ble_tracker:
  scan_parameters:
    interval: 320ms
    window: 320ms
    active: true

bluetooth_proxy:
  active: true

At-a-Glance

  • Protocol: BLE 5.0; BTHome v2 (encrypted)
  • Sensing: Open/Close, Temperature, Humidity
  • Broadcast Interval: ~1 minute
  • Power: 2 × AAA; life ~1–2 years
  • Operating Temp: −40 °C to +60 °C
  • Mounting: 3M adhesive

Material: Flame-retardant ABS, matte white finish.

Specifications

Wireless Protocol Bluetooth Low Energy (BLE 5.0)
Protocol Standard BTHome v2 (encrypted)
Transmission Type BLE broadcast
Detection Method Magnetic reed switch
Response Time < 100 ms
Operating Temperature −40 °C ~ +60 °C
Power Supply 2 × AAA (not included)
Standby Current < 6 µA
Broadcast Interval ~1 minute
Estimated Battery Life ~1–2 years
Sensor Dimensions 72 × 26 × 19 mm
Magnet Dimensions 40 × 15 × 15 mm
Mounting Method Pre-applied 3M adhesive
Material Flame-retardant ABS, matte white
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