BPN803: Single Chip Mote

Abstract: 

The single chip micro mote 3C (SCµM-3C) was designed to be a wireless sensor node on a chip capable of joining a network as a bare die with a standards compliant BLE and 802.15.4 mesh communication radio while fully self-contained and functional with no external components. SCµM-3C’s deep level of integration allows users to connect a battery, program using the touchless optical programmer and be ready to connect to the network. Advancements in communications as a crystal-free radio include SCµM-3C joining an 802.15.4 mesh network running OpenWSN, transmitting BLE beacon packets to a cell phone, and RF temperature compensation via both initial calibration and calibration-free in-use algorithms. As a sensor, SCµM-3C was shown to localize itself in 3D space with ~1 cm accuracy and measure temperatures from 0 to 100C with <2 C accuracy. When interfacing with external sensors and devices SCµM-3C provides ease of use due to the 16 GPIOs and ADC on-chip. This has allowed SCµM-3C to interface with a variety of devices such as: wireless gas sensing, operation from a 5x5 mm2 printed LiPo battery, operation from inductively coupled wireless power transmission, solar powered wireless temperature sensor and a fully autonomous solar powered wireless inchworm motor and micro-gripper. The Optical RX has been redesigned for sub 20 uW power consumption, >1.8 Mbps using NRZ and BER 2E-8. Three PCB boards have been designed: an 8 mm x 5 mm barebones board, which was used for tracking Asian Giant hornets, a slightly bigger board for IMU applications, and large development board to access all of SCµM’s functionality. The next goals are: designing a 10uW sleep mode and printing batteries directly on SCµM-3C.

Publication date: 
August 27, 2021
Publication type: 
BSAC Project Materials (Current)
Citation: 
PREPUBLICATION DATA - ©University of California 2021

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