#include <SoftwareSerial.h>

#define SEN_PIN   A2   // Sensor
#define LED_PIN   PB1

#define SERIAL_TX PB3
#define SERIAL_RX PB0

#define LED_DELAY 1000

bool switchLED = false;
unsigned long timerLED = 0;

int sensorValue = -1;

SoftwareSerial mySerial(SERIAL_RX, SERIAL_TX);

void setup() {
  pinMode(SEN_PIN, INPUT);
  mySerial.begin(9600);
  analogWrite(SEN_PIN, 1);
}


void loop() {
  sensorValue = analogRead(SEN_PIN);
  analogWrite(LED_PIN, map(sensorValue, 0, 1023, 0, 255));
  mySerial.print(sensorValue);
  mySerial.println();
}