Raspberry Pi Multi-Spectrometer – AS7341 11-Channel Spectral Sensor Module for Color and Light Analysis

The Raspberry Pi Multi-Spectrometer is a spectral sensing module for color matching, light-source analysis, reflectance experiments, and optical education projects. It is commonly associated with AS7341-class 11-channel spectral sensing, which covers multiple visible channels plus clear, near-infrared, and flicker-related measurements.

This module fits Raspberry Pi and embedded Linux workflows, and it can also support I2C microcontroller experiments depending on the breakout interface. It pairs with the Raspberry Pi Pico W, general I2C systems, and display or logging projects based on OpenELAB controllers. For raw environmental sensing, compare it with the BME680 Sensor Board.

AS7341-class sensors are useful for relative spectral signatures rather than laboratory-grade spectrometry. According to ams OSRAM AS7341 references, the device covers approximately 350nm to 1000nm and communicates over I2C; calibrate with known light sources when comparing samples.

Technical Specifications

Board Layout & Label Guide

• Optical Window – Keep clean and facing the target light or sample.
• VCC – Power input according to board label.
• GND – Ground reference.
• SDA – I2C data line.
• SCL – I2C clock line.
• INT/GPIO – Optional interrupt or sync pin if exposed.
• Mounting Note – Use fixed geometry for repeatable readings.
• Light-Control Note – Shield from ambient light when measuring samples.

Application Scenarios

1. Linux I2C Detect

Check whether the module appears on the Raspberry Pi I2C bus.

sudo i2cdetect -y 1

2. Python I2C Register Probe

Read a byte from a known I2C address after confirming the address from documentation.

from smbus2 import SMBusADDR = 0x39with SMBus(1) as bus: value = bus.read_byte_data(ADDR, 0x92) print(hex(value))

3. CSV Spectral Logger Skeleton

Use your AS7341 library output to write spectral rows for later analysis.

import csvimport timewith open(“spectral_log.csv”, “a”, newline=””, encoding=”utf-8″) as f: writer = csv.writer(f) while True: channels = [0, 0, 0, 0, 0, 0, 0, 0] writer.writerow([time.time()] + channels) f.flush() time.sleep(1)

Packing List

• 1 x Raspberry Pi Multi-Spectrometer Module

FAQ

Q: What is this used for?
A: Color, light-source, and relative spectral analysis experiments.

Q: Is it laboratory grade?
A: Treat it as an embedded spectral sensor unless separately calibrated.

Q: What interface does it use?
A: I2C for AS7341-class sensors.

Q: What spectral range is typical?
A: AS7341-class sensors cover roughly 350nm to 1000nm.

Q: Can I use it with Raspberry Pi?
A: Yes, this product is positioned for Raspberry Pi workflows.

Q: Why do readings change with distance?
A: Optical geometry and illumination strongly affect readings.

Q: Do I need calibration?
A: Yes, for comparisons across samples or systems.

Q: How do I improve repeatability?
A: Use fixed distance, fixed light source, and shield ambient light.