Minimum size, but with maximum flexibility
Würth Elektronik presents two highly compact radio modules. They offer designers maximum freedom to design proprietary radio solutions beyond standard protocols. The hardware of the Tarvos-e and Olis-e modules, which measure just 12 × 8 × 2 mm, is identical to that of the Metis-e radio module. They are all based on the Texas Instruments CC1310 SoC chipset and use the 868 MHz frequency band. Metis-e was introduced at the end of 2024 as a solution specifically designed for the radio transmission of meter readings (wireless M-Bus). Thanks to their compact design and low-power operating modes, the radio modules are ideal for use in battery-powered devices. In the power-saving "Standby" and "Shutdown" modes, the modules consume only 1,6 µA and 200 nA, respectively.
Based on Würth Elektronik's proprietary WE-ProWare radio protocol, the Tarvos-e module offers compatibility with the Tarvos-III and Thebe-II. It enables targeted optimization of radio communication, whether achieving high transmission rates of up to 400 kbps or a range of up to 2,7 km. This gives it maximum flexibility, ideal for applications where standard protocols are no longer sufficient. The module provides an RF output power of 14 dBm and uses a UART interface for communication.
The Olis-e module offers even greater design freedom thanks to built-your-own firmware. The Texas Instruments SIMPLELINK CC13x0 SDK allows designers to implement their applications directly on the SoC, including custom radio protocols and system logic.
Proprietary radio protocols as a powerful alternative to Bluetooth® LE
The radio modules use proprietary protocols, making them a particularly attractive solution for applications where both the transmitter and receiver are custom-developed. Unlike Bluetooth, the module boasts superior range, particularly within buildings, thanks to the use of the 868 MHz band instead of 2,4 GHz.
This allows for more reliable communication, even through walls and other structural obstacles.
In addition to the standard version in the 868 MHz band, the presented radio module is also available, upon request, in a variant specifically adapted for the 915 MHz band. This option enables its application in markets such as the USA, where the 915 MHz band can be used without a license.
All three versions feature evaluation boards with a USB interface for PC connection, a comprehensive user manual, and software tools.
