#include <Wire.h>
#include “TSL2561.h”

// Example for demonstrating the TSL2561 library – public domain!

// connect SCL to analog 5
// connect SDA to analog 4
// connect VDD to 3.3V DC
// connect GROUND to common ground
// ADDR can be connected to ground, or vdd or left floating to change the i2c address

// The address will be different depending on whether you let
// the ADDR pin float (addr 0×39), or tie it to ground or vcc. In those cases
// use TSL2561_ADDR_LOW (0×29) or TSL2561_ADDR_HIGH (0×49) respectively
TSL2561 tsl(TSL2561_ADDR_FLOAT);

void setup(void) {
Serial.begin(9600);

if (tsl.begin()) {
Serial.println(“Found sensor”);
} else {
Serial.println(“No sensor?”);
while (1);
}

// You can change the gain on the fly, to adapt to brighter/dimmer light situations
//tsl.setGain(TSL2561_GAIN_0X); // set no gain (for bright situtations)
tsl.setGain(TSL2561_GAIN_16X); // set 16x gain (for dim situations)

// Changing the integration time gives you a longer time over which to sense light
// longer timelines are slower, but are good in very low light situtations!
tsl.setTiming(TSL2561_INTEGRATIONTIME_13MS); // shortest integration time (bright light)
//tsl.setTiming(TSL2561_INTEGRATIONTIME_101MS); // medium integration time (medium light)
//tsl.setTiming(TSL2561_INTEGRATIONTIME_402MS); // longest integration time (dim light)

// Now we’re ready to get readings!
}

void loop(void) {
// Simple data read example. Just read the infrared, fullspecrtrum diode
// or ‘visible’ (difference between the two) channels.
// This can take 13-402 milliseconds! Uncomment whichever of the following you want to read
// uint16_t x = tsl.getLuminosity(TSL2561_VISIBLE);
uint16_t x = tsl.getLuminosity(TSL2561_FULLSPECTRUM);
//uint16_t x = tsl.getLuminosity(TSL2561_INFRARED);
Serial.println(x, DEC);
delay(100);
}