Wemos D1 mini TSL2561

light-sensor-test-v2.ino

#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_TSL2561_U.h>
#include <SPI.h>

Adafruit_TSL2561_Unified tsl = Adafruit_TSL2561_Unified(TSL2561_ADDR_FLOAT, 12345);
 
void setup(void) {
  Serial.begin(9600);
  Serial.println("");
  Serial.println("Light Sensor Test"); 
  Serial.println("");
 
  if(!tsl.begin()) {
    Serial.print("No TSL2561 detected");
    while(1);
  }

  tsl.enableAutoRange(true);
  tsl.setIntegrationTime(TSL2561_INTEGRATIONTIME_13MS);

  pinMode(LED_BUILTIN, OUTPUT);
}
 
 
void loop(void) {  
  sensors_event_t event;
  tsl.getEvent(&event);
 
  if (event.light) {
    Serial.print(event.light); 
    Serial.println(" lux");
    if(event.light < 15) {
      digitalWrite(LED_BUILTIN, LOW);
    } else {
      digitalWrite(LED_BUILTIN, HIGH);
    }
  } else {
    Serial.println("Sensor overload");
  }

  delay(500);
}

light-sensor-test.ino

#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_TSL2561_U.h>
#include <SPI.h>

Adafruit_TSL2561_Unified tsl = Adafruit_TSL2561_Unified(TSL2561_ADDR_FLOAT, 12345);

void setup(void) {
  Serial.begin(9600);
  Serial.println("");
  Serial.println("Light Sensor Test"); 
  Serial.println("");
 
  /* Initialise the sensor */
  if(!tsl.begin()) {
    Serial.print("No TSL2561 detected");
    while(1);
  }

  tsl.enableAutoRange(true);
  tsl.setIntegrationTime(TSL2561_INTEGRATIONTIME_13MS); 
}
 
 
void loop(void) 
{  
  /* Get a new sensor event */ 
  sensors_event_t event;
  tsl.getEvent(&event);
 
  /* Display the results (light is measured in lux) */
  if (event.light) {
    Serial.print(event.light); 
    Serial.println(" lux");
  }
  else {
    Serial.println("Sensor overload");
  }

  delay(500);
}