SparkFun Spectral Sensor – AS7343 (Qwiic)

Resources:

Schematic
KiCad Files
Board Dimensions
Datasheet(AS7343)
Hookup Guide
SparkFun AS7343 Arduino Library
SparkFun AS7343 Python Package
GitHub Repository

SparkFun Spectral Sensor AS7343 Qwiic for Visible and Near-Infrared Light Analysis
The SparkFun Spectral Sensor AS7343 (Qwiic) is a compact, high-sensitivity multi-spectral sensing solution designed for precise light measurement across both the visible (VIS) and near-infrared (NIR) ranges. Built around the AMS AS7343 spectral sensor, it enables accurate detection of reflected, emitted, and transmitted light from approximately 380 nm to 1000 nm. This makes it well suited for spectroscopy applications such as colour matching, spectral signature analysis, material identification, and optical filtering, even in low-light conditions or when sensing through tinted glass.
Mounted on a 1 inch by 1 inch Qwiic breakout board, the AS7343 integrates seamlessly with I2C-based systems using solderless Qwiic connectors. The board includes onboard voltage regulation, indicator LEDs, optional LED drive support, and GPIO functionality for synchronised measurements. Its ultra-low power operation and wide spectral coverage make it suitable for portable instruments, research projects, industrial sensing, and embedded optical systems.
Key Features:

Multi-Spectral Sensing: 14-channel spectral sensor covering visible and near-infrared ranges
Wide Wavelength Coverage: Operates from approximately 380 nm to 1000 nm
Visible and NIR Channels: 11 visible channels, 1 near-infrared channel, and 1 clear channel
High Sensitivity: Reliable operation in low-light environments and behind dark or tinted glass
Flicker Detection: Supports detection of light flicker sources
Integrated LED Driver: On-chip LED driver with optional external sensing LED support
Low Power Design: Ultra-low current consumption with multiple power modes
Easy Integration: Dual Qwiic connectors with standard 0.1 inch PTH access