Bluetooth Low Energy tracking device helps users find their missing keys and personal items

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The Nut3 key finder employs Nordic’s nRF52810 SoC to provide bidirectional wireless connectivity between the device and user’s smartphone

Nordic Semiconductor today announces that Beijing, China-based wearable electronics firm Beijing Zizai Technology Co., Ltd. has released a range of wireless trackers featuring Nordic’s nRF52810 Bluetooth® Low Energy (Bluetooth LE) System-on-Chip (SoC), that helps users prevent the loss of personal items.

The ‘Nut3’ key finder comes in a compact 38 by 38 by 7 mm form factor and can be attached to the user’s key fob or other personal items. Once paired with the user’s Bluetooth 4.0 (and later) smartphone using wireless connectivity enabled by the Nordic SoC, from the iOS- and Android-compatible ‘Nut’ app the user can find and ring the Nut3 device easily, set alerts if the device and the smartphone become separated by a certain distance, as well as record the location where the device became disconnected. Nut users can also create a ‘lost and found’ community to help one another locate missing items.

Nordic has provided great support during our development work
Michael Tian, Beijing Zizai Technology Co., Ltd
Because the nRF52810 SoC’s S132 SoftDevice high-performance Bluetooth LE protocol ‘stack’ supports both Central and Peripheral roles, Nut3 not only emits an alarm if separated from the user’s smartphone, but can also call the paired smartphone with the press of a button if the user knows where the tracker is but cannot find the mobile. The nRF52810 is also available with the memory-optimized S112 SoftDevice if Peripheral-only operation is required.
The Nut3 is powered by a single CR2032 coin cell battery, providing up to 12 months battery life between replacement in standard operation, thanks, in part, to the ultra-low power characteristics of the Nordic SoC. The nRF52810 has been engineered to minimize power consumption with features such as the 2.4GHz radio’s 4.6mA peak RX/TX currents and a fully-automatic power management system that reduces power consumption by up to 80 percent compared with Nordic’s nRF51 Series SoCs.
Nordic’s nRF52810 multiprotocol SoC combines a 64MHz, 32-bit Arm® Cortex® M4 processor, with a 2.4GHz multiprotocol radio (supporting Bluetooth 5, ANT™, and proprietary 2.4GHz RF protocol software) featuring reduced radio energy consumption, with 192kB Flash memory and 24kB RAM. Nordic's unique software architecture provides clear separation between the RF protocol software and the developer's application code, this simplifies development, and ensures the SoftDevice doesn’t get corrupted when the customer is developing, compiling, testing, and verifying their application code
“Nordic has provided great support during our development work,” says Michael Tian, CEO of Beijing Zizai Technology Co., Ltd. “All the development tools and technical documents are extremely helpful, and if we did have questions the Nordic DevZone community quickly answered them. 
“At the same time, Nordic provided extensive technical support throughout R&D and production.”