Bluetooth module connects to both legacy and Smart devices

Bluetooth module connects to both legacy and Smart devices

Silicon Labs has unveiled a dual-mode Bluetooth Smart Ready module that lets embedded developers integrate both Bluetooth Smart and Bluetooth Basic Rate/Enhanced Data Rate (BR/EDR) wireless technologies while minimizing design time, cost and complexity.
By eeNews Europe


The Bluetooth Smart Ready BT121 module from Bluegiga, a Silicon Labs company, provides a pre-certified, fully integrated, high-performance solution that includes the Bluetooth radio, microcontroller (MCU) and on-board Bluetooth software stack supported by Silicon Labs’ complimentary Bluetooth Smart Ready software development kit (SDK) and BGScript scripting language. The BT121 Bluetooth Smart Ready module and software are designed to help developers accelerate time to market and reduce development costs and compliance risks by providing a versatile, plug-and-play Bluetooth solution.

The BT121 module is ideal for applications requiring connectivity to legacy devices that only support Bluetooth BR/EDR, as well the latest applications using Bluetooth Smart such as connected home, health and fitness, wearables and point-of-sale terminals. There are millions of legacy smart phones, tablets and PCs still in service that do not support Bluetooth Smart technology. Additionally, some applications require the higher throughput advantages of Bluetooth Classic technology, which Bluetooth Smart is not designed to achieve.

The BT121 module provides a “best of both worlds” for both ultra-low-power and high-data-rate Bluetooth connectivity applications. The module can connect to legacy devices that only support Bluetooth SPP or Apple iAP2 profiles, for example, as well as to devices that support Bluetooth Smart. The easy-to-use BT121 module integrates a high-performance Bluetooth radio with an extended range of up to 400 meters, a low-power ARM MCU, and a fully certified Bluetooth Smart Ready protocol stack in an 11 x 14-mm surface-mount package.

No RF or Bluetooth protocol development expertise is necessary to implement the BT121 module in Bluetooth designs. The module can be used as a peripheral along with an external host MCU, or applications can be embedded into the built-in MCU with the Bluegiga BGScript scripting language, creating a completely standalone design with minimal external components.


Available for download at no charge from Bluegiga (, the Bluetooth Smart Ready SDK is a set of software tools for simplifying the development of Bluetooth Smart Ready applications. Developers can access dozens of example Bluetooth Smart application profiles, which can be used as templates, enabling them to accelerate development time.


The Bluetooth Smart Ready stack and SDK are fully compatible with the recently announced Blue Gecko Bluetooth Smart modules. This compatibility makes it easy for developers to migrate their designs between Silicon Labs’ Bluetooth Smart and Smart Ready modules with a consistent set of application programming interfaces (APIs) and software tools.

Pre-production samples of the Bluetooth Smart Ready BT121 module, along with the development kit, are available now for engineering evaluation and prototyping. Volume quantities of the module are planned for Q3.

Bluetooth Smart Ready BT121 information page