Overview
Description
Renesas' Wireless Ranging (WiRa™) Software Development Kit (SDK) enhances the DA1469x family of Bluetooth® Low Energy (LE) SoCs with highly accurate and reliable distance measurement capabilities. Current market offerings fall short due to radio signal strength indicator (RSSI), a flawed measure that is sensitive to radio signal blockages. Unlike RSSI, the WiRa™ SDK uses radar-like implementation to greatly enhance distance measurement for connected devices, amounting to +/- 0.5 meters in typical situations. The result is a solution with 10x the accuracy of competing RSSI-based localization options.
The WiRa™ SDK's 2.4GHz radio interweaves Bluetooth Low Energy data packets with constant tone frequency exchanges to generate phase-based ranging signals. The high-resolution, on-chip radio wave sampling provides high-quality IQ samples, which form the inputs for distance determination. Data processing algorithms then filter the data for noise, interference and reflections. This process outputs the shortest distance over-the-air signal path length, providing the application with a distance measurement value to use.
The WiRa™ SDK leverages the existing DA1469x wireless MCU family – including its Arm® Cortex®-M33 application processor, M0+-based baseband processor and best-in-class radio performance – to provide distance measurements from a single chip. It also comes equipped with a Bluetooth LE 5.1 compliant stack and software implementation, eliminating the need for hardware adaptations or an external host processor and ensuring co-existence between Bluetooth communications and the distance measurement process.
This all adds up to a solution that provides end-users with greater reliability, security, and location and tracking accuracy for the IoT devices in peer-to-peer applications.
Features
- Add distance measurement as a feature to your wireless applications
- Achieve 10s of cm accuracy in typical use cases
- Distance reported out within 200ms
- No additional hardware needed compared to standard Bluetooth LE system designs
- A proprietary implementation that co-exists with Bluetooth LE communication
- Comprehensive software suite including data processing algorithms, distance output, UI, and software application example
- Flexibility to further optimize, adapt or replace data processing algorithms
- Small RAM memory and MIPS requirements; runs on any DA1469x Bluetooth LE SoC variant
- Suitable for battery-powered devices
- Benefit from DA1469x on-chip integrated battery charger
- Pre-programmed development kit including two DA14695 Development Kit-USB boards each fitted with a MikroBUS™ OLED display
Applications
- Asset tracking
- Indoor positioning
- Smart locks
- Authentication (e.g., for mobile payments)
Documentation
Featured Documentation
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| Type | Title | Date |
| Manual - Software | PDF 3.27 MB | |
| Release Note | PDF 208 KB | |
| Product Brief | PDF 2.07 MB | |
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Design & Development
Renesas WiRa
The WiRa™ app from Renesas Electronics is a mobile application that works with devices which support the Renesas WiRa™ technology, such as Development Kits based on Renesas DA1469x Bluetooth® Low Energy SoC.
Processing table
DA14695-00HQDEVKT-RANG Active
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Videos & Training
Renesas Phase-based Wireless Ranging: WiRa
Renesas' WiRa technology offers an attenuation-tolerant ranging solution that is able to operate in highly reflective to RF, indoor environments even in the presence of 2.4GHz (ISM band) noise from sources such as Wi-Fi.
Video List
