The Shelly BLU Button1 is a Bluetooth Low Energy (BTHome) device based on the Silicon Labs EFR32BG22 chipset. Technical specifications indicate support for AES-128 encryption and four distinct trigger actions. The hardware includes an integrated buzzer and LED for haptic and visual confirmation of commands. The unit is rated IPX4, providing splash resistance, and uses an aggressive sleep mode to achieve a theoretical 2-year lifespan on a CR2032 battery.
Performance metrics demonstrate local-first execution when paired with a "Bluetooth Proxy" such as a Shelly Pro/Plus device or an ESP32. This architecture allows for the execution of complex local scripts without a cloud connection. Material analysis identifies a mechanical dome switch rated for high-frequency use. Signal reliability is dependent on proximity to a Bluetooth gateway, with an effective range of 10-15 meters in standard residential environments.
If you do not have an existing Shelly Pro/Plus device to serve as a Bluetooth gateway, the Aqara Zigbee Mini Switch provides a similar form factor using the Zigbee mesh protocol.
This button is a specialized trigger in wireless programmable buttons, emphasizing local scripting and encrypted communication.
