Illum sensor

Overview

This sample reads the value of the illuminance sensor on the 4-Sensors leaf and displays it on the serial monitor.

Leaf to use

Use the following leaves.

Type	Name	Q’ty
AZ62	Connector Cover	1
AI01	4-Sensors	1
AZ01	USB	1
AP03	STM32 MCU	1
AV01	CR2032	1
	CR2032 coin cell battery	1
	M2*15mm screw	2

Assembly

Let’s assemble leaves as shown in the figure below.

assemble1

Source code

Write the following program¹ in the Arduino IDE.

In order to make this sketch work, you need to install the libraries If you haven’t installed it yet, refer to Environment to install it.

//=====================================================================
//  Illuminance meter
//
//    (c) 2020 Trillion-Node Study Group
//    Released under the MIT license
//    https://opensource.org/licenses/MIT
//
//      Rev.00 2020/05/05  First release
//=====================================================================
#include <Wire.h>
#include <ClosedCube_OPT3001.h>

#define OPT3001_ADDRESS 0x45      // ADDR pin = VCC

ClosedCube_OPT3001 illum;

float dataIllum;

void setup() {
  // initialize serial communication at 115200 second per second:
  Serial.begin(115200);
  // initialize i2c communication with OPT3001:
  Wire.begin();

  delay(10);

  OPT3001_Config illumConfig;
  OPT3001_ErrorCode illumErrorConfig;

  illum.begin(OPT3001_ADDRESS);

  illumConfig.RangeNumber = B1100;               // automatic full scale
  illumConfig.ConvertionTime = B1;               // convertion time = 800ms
  illumConfig.ModeOfConversionOperation = B11;   // continous conversion
  illumConfig.Latch = B0;                        // hysteresis-style

  illumErrorConfig = illum.writeConfig(illumConfig);

  if(illumErrorConfig != NO_ERROR){
    illumErrorConfig = illum.writeConfig(illumConfig);   //retry
  }
}

void loop() {
    OPT3001 result = illum.readResult();

    if(result.error == NO_ERROR){
      dataIllum = result.lux;
    }

    Serial.println("Lum[lx] = " + String(dataIllum));

    delay(1000);

}

Illuminance_Meter.ino

Execution Results

Open the serial monitor of the Arduino IDE and set the baud rate to 115200 bps and you will see the illuminance.