DF Robot 11 Channel Light Sensor

The DFRobot AS7341 11-Channel Visible Light Breakout Board employs the new generation of AS7341 spectral sensor IC launched by the well-known AMS company. The sensor features eight channels for the visible light, one channel for near-IR, and one channel without a filter. Also it integrates a dedicated channel to detect ambient light flicker. Besides that, this sensor comes with 6 independent 16-bit ADC channels for data processing in parallel. The two on-board extra-bright LEDs can supply light in dark environment.

Quick Spec

• Power Supply: 3.3 ~ 5V
• Visible Light Detection Range: F1(405-425nm), F2(435-455nm), F3(470-490nm), F4(505-525nm), F5(545-565nm), F6(580-600nm), F7(620-640nm), F8(670-690nm)
• Operating Current (LED Off): <5mA
• LED Driving Current: Class 1-20 (4-42mA)
• I2C Address: 0x39
• Operating Temperature Range: -30 ~ +85°C
• Operating Humidity Range: 5%RH~85%RH
• Dimension: 18 x 14mm
• Net Weight: 13g

Pinout

• VCC: Positive
• GND: Negative
• SCL: I2C Clock line
• SDA: I2C Data line
• INT: Interrupt Pin: active Low
• GPIO: General input/output

Wiring Diagram

Demo Code

/*!
 * @file getData.ino
 * @brief Read the values of 10 optical channels of the AS7341 spectral sensor, the more light of a certain wavelength of the light source,
 * the greater the corresponding channel value.
 *
 * @copyright   Copyright (c) 2010 DFRobot Co.Ltd (http://www.dfrobot.com)
 * @licence     The MIT License (MIT)
 * @author [fengli]([email protected])
 * @version  V1.0
 * @date  2020-07-16
 * @get from https://www.dfrobot.com
 * @url https://github.com/DFRobot/DFRobot_AS7341
 */
#include "DFRobot_AS7341.h"
/*!
 * @brief Construct the function
 * @param pWire IC bus pointer object and construction device, can both pass or not pass parameters, Wire in default.
 */
DFRobot_AS7341 as7341;

void setup(void)
{
  Serial.begin(115200);
  //Detect if IIC can communicate properly 
  while (as7341.begin() != 0) {
    Serial.println("IIC init failed, please check if the wire connection is correct");
    delay(1000);
  }
//  //Integration time = (ATIME + 1) x (ASTEP + 1) x 2.78µs
//  //Set the value of register ATIME, through which the value of Integration time can be calculated. The value represents the time that must be spent during data reading.
//  as7341.setAtime(29);
//  //Set the value of register ASTEP, through which the value of Integration time can be calculated. The value represents the time that must be spent during data reading.
//  as7341.setAstep(599);
//  //Set gain value(0~10 corresponds to X0.5,X1,X2,X4,X8,X16,X32,X64,X128,X256,X512)
//  as7341.setAGAIN(7);
//  //Enable LED
//  //as7341.enableLed(true);
//  //Set pin current to control brightness (1~20 corresponds to current 4mA,6mA,8mA,10mA,12mA,......,42mA)
//  //as7341.controlLed(10);
}
void loop(void)
{
  DFRobot_AS7341::sModeOneData_t data1;
  DFRobot_AS7341::sModeTwoData_t data2;

  //Start spectrum measurement 
  //Channel mapping mode: 1.eF1F4ClearNIR,2.eF5F8ClearNIR
  as7341.startMeasure(as7341.eF1F4ClearNIR);
  //Read the value of sensor data channel 0~5, under eF1F4ClearNIR
  data1 = as7341.readSpectralDataOne();

  Serial.print("F1(405-425nm):");
  Serial.println(data1.ADF1);
  Serial.print("F2(435-455nm):");
  Serial.println(data1.ADF2);
  Serial.print("F3(470-490nm):");
  Serial.println(data1.ADF3);
  Serial.print("F4(505-525nm):");   
  Serial.println(data1.ADF4);
  //Serial.print("Clear:");
  //Serial.println(data1.ADCLEAR);
  //Serial.print("NIR:");
  //Serial.println(data1.ADNIR);
  as7341.startMeasure(as7341.eF5F8ClearNIR);
  //Read the value of sensor data channel 0~5, under eF5F8ClearNIR
  data2 = as7341.readSpectralDataTwo();
  Serial.print("F5(545-565nm):");
  Serial.println(data2.ADF5);
  Serial.print("F6(580-600nm):");
  Serial.println(data2.ADF6);
  Serial.print("F7(620-640nm):");
  Serial.println(data2.ADF7);
  Serial.print("F8(670-690nm):");
  Serial.println(data2.ADF8);
  Serial.print("Clear:");
  Serial.println(data2.ADCLEAR);
  Serial.print("NIR:");
  Serial.println(data2.ADNIR);
  delay(1000);
}

Expected Result

Resources

• Product Page
• Product Wiki
• Schematic
• Mechanical Diagram
• AS7341 Datasheet

Shipping List

• 1 x DF Robot 11 Channel Light Sensor