Example Code for Arduino-Measure Light Source Flicker Frequency

Hardware Preparation

• DFRduino UNO R3 (or similar) x 1
• AS7341 Visible Light Sensor x1
• Wires

Software Preparation

• Arduino IDE
• Download and install the AS7341 library and Sample Code. (About how to install the library?)

Wiring Diagram

Other Preparation Work

Example Code 2.1 and code 2.2 can be used to simulate the flicker of ambient light at 50Hz or 60Hz.

Sample Code

/*!
 * @file getFlicker.ino
 * @brief Read the flicker frequency of light source 
 * 
 * @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);
  }
}

void loop(void){
  uint8_t freq = 0;
  //Read the value of register flicker, through which the flicker frequency of the light source can be predicted
  freq = as7341.readFlickerData();
  if (freq == 1) {
    Serial.println("Unknown frequency");
  } else if (freq == 0) {
    Serial.println("No flicker");
  } else {
    Serial.print(freq);
    Serial.println("Hz");
  }
}

Result