DFRobot
Self-powered Wireless Switch (BLE Beacon)
· MPN: TEL0173
A battery-free wireless switch that generates its own power from the mechanical energy of each button press. The built-in micro power generator and energy st...
A battery-free wireless switch that generates its own power from the mechanical energy of each button press. The built-in micro power generator and energy storage circuit capture kinetic energy, store it, and transmit a BLE 5.3 beacon signal — no batteries, no wiring, no maintenance.
Each switch has a unique 6-byte address code for secure, interference-free transmission. Compatible with ESP32 and other Bluetooth-enabled microcontrollers, as well as smartphones, making it easy to integrate into home automation, signalling, and IoT projects.
Key Features
- No Battery Required – Self-powered via kinetic energy harvesting from each press
- BLE 5.3 Beacon – Broadcasts on advertising channels 37, 38, and 39 (2.4 GHz)
- Unique Address Code – 6-byte unique identifier for secure, interference-free operation
- 100,000 Press Lifespan – Designed for long-term, maintenance-free use
- No Dedicated Receiver Needed – Works with any BLE-capable device (ESP32, smartphone, etc.)
- Low Actuation Force – Typical 1,300 g with 1.3 mm press distance
- Fast Transmission – 1 Mbps with GFSK modulation for strong anti-interference performance
Specifications
- Frequency: 2.4 GHz
- Advertising Channels: 37 + 38 + 39 (2402, 2426, 2480 MHz)
- Data Format: Supplier-customised Beacon
- Generated Energy: 250 µJ per press
- Actuation Force: ~1,300 g typical
- Press Distance: 1.3 mm
- Press Frequency: Up to 2 presses per second
- Communication Distance: >40 m (open outdoor, smartphone receiver)
- Module Weight: 14 g ± 2.5 g (excluding antenna)
- Module Dimensions: 44 × 22 × 11 mm
Ideal For
- Wireless doorbells
- Call buttons and ordering devices
- Wall switches (no wiring required)
- IoT and smart home automation
- ESP32-based BLE projects
Package Contents
- 1× Self-powered Wireless Switch (BLE Beacon)
- 1× 2.4 GHz FPC IPEX1 Antenna
Jargon buster
Plain-language definitions for the technical terms used above.
- BLE
- BLE stands for Bluetooth Low Energy, a Bluetooth mode designed for lower power use and modern phone compatibility. It matters because BLE support can make the module easier to use with Apple devices and battery-powered projects, though it may behave differently from classic serial Bluetooth.
- ESP32
- ESP32 is a family of microcontroller modules with built-in wireless features such as Bluetooth and WiFi. Knowing this product uses an ESP32-based module helps explain how it provides wireless serial communication and firmware update features.
- FPC
- FPC stands for flexible printed circuit, a flat flexible cable or connector style often used where space is tight. It matters because this breakout needs the correct pin count and pitch FPC cable to connect reliably to the display or high-speed interface.
- IoT
- Short for Internet of Things, meaning physical devices that connect to networks or the internet to send data or be controlled remotely. It matters if you want projects such as connected sensors, remote controls or classroom data-logging activities.
Find this product in
Components
Supplier page — dfrobot.com
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Related Tutorials
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