The extraordinary features of Rouji Smart Handwriting Book

Digital tablet uses Nordic low-power Bluetooth solution

Transfer notes and sketches to the user's smartphone or tablet via low-latency wireless technology

Royole's Roji smart handwriting book integrates Nordic's nRF52832 SoC device and incorporates proprietary flexible sensor technology, allowing users to send handwritten notes and drawings to paired devices for editing and sharing via low-power Bluetooth technology.

Nordic Semiconductor, an ultra-low power (ULP) RF specialist, has announced that Shenzhen-based human-machine interface (HMI) technology company Royole has adopted the nRF52832 Bluetooth® Low Energy (Bluetooth LE) system-on-chip (SoC) device in its RoWrite smart notebook.

The Soft Notepad is a digital handwriting pad that has traditional paper fixed on it, and is combined with Royole's proprietary advanced flexible sensor technology to accurately track the position of the stylus on the paper. The position information is combined with the pressure sensor circuit built into the Soft Notepad stylus to monitor 2,048 pressure points and accurately capture all handwriting.

Every time a user puts pen to paper, a low-latency, low-energy Bluetooth connection powered by Nordic technology wirelessly transmits the information to a paired Bluetooth 4.0 (or higher) iOS or Android smartphone or tablet to digitally reproduce and preserve the image.

Users can edit, enhance or delete these saved images through the Rouji app installed on their smartphones and then share them instantly with friends, colleagues or clients. In the absence of a receiver, users can store their handwriting on the 16MB external memory on the digital notebook and transfer it to their mobile device later.

Rouji uses a micro-USB charging interface to provide 30 days of battery life in standby mode and 8 hours of continuous battery life, and one reason for its low power consumption is the low power consumption characteristics of the nRF52832 SoC. The SoC device has been carefully designed with a 2.4GHz RF component with a peak RX/TX current of 5.5mA, and its fully automatic power management system can minimize power consumption.

Nordic’s nRF52832 multiprotocol SoC integrates a 64MHz, 32-bit Arm® Cortex™ M4F processor with a 2.4GHz multiprotocol RF component (supporting Bluetooth 5, ANT™, and proprietary 2.4GHz RF software) with -96dB receive sensitivity, as well as 512kB Flash memory and 64kB RAM.

The SoC is equipped with Nordic’s S132 protocol stack and Bluetooth 5 certified RF software protocol stack for building advanced low-power Bluetooth applications. The S132 protocol stack supports Central, Peripheral, Broadcaster and Observer low-power Bluetooth roles, and can achieve up to 20 connections and parallel role operation at the same time.

“A key reason for choosing Nordic’s Bluetooth LE solution is its low power consumption, which helps extend the battery life of Royole compared to other wireless protocols,” said Yingying Cai from Royole’s product team. “The longer standby time prevents users from being frustrated by not being able to use their handwriting notebooks during critical creative moments when inspiration strikes.”