#include <Arduino.h>
#include <Wire.h>
#include <Adafruit_Sensor.h>
#include "Adafruit_TSL2591.h"
#include <ArduinoLog.h>

Adafruit_TSL2591 tsl = Adafruit_TSL2591(2591);  // pass in a number for the sensor identifier (for your use later)
const uint8_t i2caddr = 0x29;
TwoWire tsl2w = TwoWire(0);

void setup() {
  Serial.begin(115200);
  Log.begin(LOG_LEVEL_NOTICE, &Serial);

  tsl2w.setPins(22, 23);
  if (tsl.begin(&tsl2w, i2caddr)) {
    Log.notice(F("Found a TSL2591 sensor"));
  }
  tsl.setTiming(TSL2591_INTEGRATIONTIME_300MS);
}

void printLux(tsl2591Gain_t gain) {
  tsl.setGain(gain);  
  uint32_t lum = tsl.getFullLuminosity();
  uint16_t ir, full;
  ir = lum >> 16;
  full = lum & 0xFFFF;

  float lux = tsl.calculateLux(full, ir);
  Log.notice(F("2 - g=%d l=%F i=%d f=%d" CR), gain, lux, ir, full);
}

void loop() {

  Log.notice(F("----------------------------" CR));
  printLux(TSL2591_GAIN_LOW);
  printLux(TSL2591_GAIN_MED);
  printLux(TSL2591_GAIN_HIGH);
  delay(1000);
}