#include <LedControl.h>

int sensor = 0;
int humedad = 0;
int humedadant = 0;

int DIN = 11;
int CS = 10;
int CLK   = 13;

LedControl lc = LedControl(DIN, CLK, CS, 0);

byte feliz[8] = {B00111100, B01000010, B10100101, B10000001, B10100101, B10011001, B01000010, B00111100};
byte normal[8] = {B00111100, B01000010, B10100101, B10000001, B10111101, B10000001, B01000010, B00111100};
byte triste[8] = {B00111100, B01000010, B10100101, B10000001, B10011001, B10100101, B01000010, B00111100};

void setup() {

  lc.shutdown(0, false);
  lc.setIntensity(0, 0);
  lc.clearDisplay(0);

  pinMode(A0, INPUT);
}

void loop() {

  sensor = analogRead(A0);
  humedad = map(sensor, 0, 1023, 100, 0);

  delay(1000);

  if (humedad != humedadant) {

    if (humedad >= 55) {

      lc.clearDisplay(0);
      delay(10);
      for (int i = 0; i < 8; i++) lc.setRow(0, i, feliz[i]);

    }

    if (humedad < 55 && humedad > 20) {

      lc.clearDisplay(0);
      delay(10);
      for (int i = 0; i < 8; i++) lc.setRow(0, i, normal[i]);

    }

    if (humedad <= 20) {

      lc.clearDisplay(0);
      delay(10);
      for (int i = 0; i < 8; i++) lc.setRow(0, i, triste[i]);

    }
  }

  humedadant = humedad;
}