#include <TinyPower.h>
#include <Tiny.h>

// Pins
#define SWITCH 0
#define SENDER 2
#define CONTROLLER 4

ContactSensor sensor = ContactSensor(WINDOW1, SENDER);

int counter = 0;
bool currentState;

void setup() {
    
  pinMode(SWITCH, INPUT_PULLUP);
  pinMode(CONTROLLER, OUTPUT);
  digitalWrite(CONTROLLER, LOW);

  sensor.setup();

  updateState();
  sensor.sendStateAndVoltage(readState());

  TinyPower::setup();
  TinyPower::enableWdt(WDTO_8S);
}

void loop() {
  TinyPower::sleep();
}

void updateState() {
  currentState = readState();
}

byte readState() {
  return digitalRead(SWITCH);
}

ISR(PCINT0_vect) {
  sensor.sendStateAndVoltage(readState());
}

ISR(WDT_vect) {
  bool state = readState();
  if (state != currentState) {
	sensor.sendStateAndVoltage(readState());
    updateState();
    return;
  }
  counter++;
  if (counter % 76 == 0) {
	sensor.sendStateAndVoltage(readState());
    counter = 0;
  }
}