CC2541 Keyfob Reference Design


Design files


The Bluetooth Smart Keyfob is a small-form factor, coin-cell powered mobile accessory with buttons, buzzer, LEDs and accelerometer, demonstrating the use of several of the BLE GATT service profiles, like the  proximity and battery service profiles.

  • Bluetooth Smart keyfob
  • Runs on CR2032 coin cell battery
  • PCB antenna
  • Two-colored LED
  • Buzzer
  • Accelerometer
  • Two buttons
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Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDR191.PDF (186 K)

Detailed schematic diagram for design layout and components

SWRR114.ZIP (1039 K)

Detailed schematic diagram for design layout and components

TIDR192.PDF (54 K)

Complete listing of design components, reference designators, and manufacturers/part numbers


Includes TI products in the design and potential alternatives.

Low-power 2.4-GHz products

CC2541Bluetooth® Low Energy and proprietary wireless MCU

Data sheet: PDF
AC/DC & DC/DC converters (integrated FET)

TPS62730Step Down Converter with Bypass Mode for Ultra Low Power Wireless Applications

Data sheet: PDF | HTML
Automotive wireless connectivity products

CC2541-Q1Automotive qualified SimpleLink Bluetooth® Low Energy wireless MCU

Data sheet: PDF | HTML

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Development kit

CC2541DK-MINI — CC2541 Mini Development Kit

The CC2541DK-MINI development kit provides a working reference design for software development of single-mode Bluetooth low energy (BLE) applications based on the Texas Instruments CC2541. The included "keyfob" board operates as a BLE peripheral device, and contains modifiable software that can be (...)
User guide: PDF | HTML
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