RC QUICKCAL FULL
RC QUICKCAL BLUETOOTH

SmartCrypt enables users to secure and fine-grain sharing of their encrypted data. To address this, we propose SmartCrypt, a data storing and sharing system that supports scalable analytics over the encrypted time-series data. Alongside, we need to protect the utility of the data streams by allowing benign services to access and run analytics securely and selectively. However, secure storing of the massive and continuously generated data poses significant privacy risks, including data breaches for IIoT applications. To provide ubiquitous access, scalability and sharing possibilities, the IIoT applications utilize the cloud to store collected data streams. Similarly, the drift of the 2 MHz RC oscillator stays within ☑,000 ppm limit 99.98% of the time.Ī growing number of Industrial Internet of Things (IIoT) devices and services collect massive time-series data related to production, monitoring and maintenance. Under these conditions, the drift of the LC oscillator stays within the ±40 ppm limit over 94% of the time. Experimental results show that it allows SCµM to keep communicating with an IEEE802.15.4 radio even under the extreme condition of using a hair dryer to heat up the chip at 3

This paper describes a continuous calibration approach for SCµM to adapt the tuning of its oscillators as the temperature changes. While one-shot calibration is possible, any temperature change causes IEEE802.15.4 communication to fail.

C, far from the 40 ppm maximum drift mandated by the IEEE802.15.4 standard.

The challenge is that the LC oscillator drifts at 2,100 ppm over a temperature range of 45 SCµM exclusively uses on-chip oscillators, including a 2.4 GHz LC oscillator to synthesize the communication frequency, and a 2 MHz RC oscillator to clock the chip rate. SCµM implements the IEEE802.15.4 and BLE standards and can communicate with off-the-shelf radios compliant to those standards. The single chip micro-mote (SCµM) is a 2×3 mm 2 single-chip crystal-free mote-on-chip. This is the first time that a crystal-free radio is participating in a channel-hopping enabled TSCH network.

RC QUICKCAL FULL

Finally, we demonstrate a heterogeneous network – composed of a SCμM chip and an OpenMote device – implementing a full 6TiSCH Industrial IoT protocol stack, which uses time synchronization and channel hopping. We further validate that, once it has self-calibrated, a SCμM chip can reliably communicate with off-the-shelf IEEE802.15.4 devices. We show that a SCμM chip can self-calibrate against this QuickCal Box in fewer than 3 min. This article introduces QuickCal, a solution that allows a SCμM chip to self-calibrate against off-the-shelf devices dedicated to assisting with its calibration. This is a challenge since its on-board RC and LC-based resonating circuits have a drift rate that can be 3 orders of magnitude worse than crystal-based oscillators typically used in today’s radios.

However, before it can be part of such networks, the crystal-free SCμM chip needs to be able to accurately tune its communication frequency to synchronize to the network.

RC QUICKCAL BLUETOOTH

The Single Chip Micro Mote (SCμM) is a crystal-free single-chip mote that brings us one step closer to the Smart Dust vision, in particular as it can communicate with off-the-shelf IEEE802.15.4 and Bluetooth Low Energy devices.

Rc quickcal