irq-door-sensor.ino

#include <SPI.h>

#include "Battery.h"
#include <Radio.h>
#include "PinChangeInterrupt.h"
//#include <TinyDebugSerial.h>
//TinyDebugSerial debug = TinyDebugSerial();

#define BUTTON  10
#define PHOTOCELL_PWR 9
#define PHOTOCELL A2

#define MAX_DELAY_AFTER_FAILED_SENT 20
#define LIGHT_THRESHOLD 200


void tick() {
};

struct SensorData
{
  byte id;
  long battery;
  byte status;
  float payload;
  byte seq;
  byte retry;
} data;

//**************************************************************


bool radioWrite(struct SensorData &data, byte retry = 0)
{
  byte addressRemote[3] = { 0, 0, 3};

  if (retry == 5) {
    //we have failed transmit..
    data.seq ++;
    return false;
  }
  data.retry = retry;
  Radio.write(addressRemote, data);
  while (true) {
    switch (Radio.flush()) {
      case RADIO_SENT:
        data.seq++;
        return true;
      case RADIO_LOST:
        return radioWrite(data, retry + 1);
    }
  }

}
//********************************************

void setup() {
  byte address[5] = {3, 4, 5};
  Radio.begin(address, 100);
  data.id = 20;
  Radio.off();
  pinMode(BUTTON, INPUT_PULLUP);
  attachPcInterrupt(BUTTON, tick, CHANGE);
}
//********************************************


float readLight() {

  pinMode(PHOTOCELL_PWR, OUTPUT);
  digitalWrite(PHOTOCELL_PWR, HIGH);
  delay(2);

  data.payload = analogRead(PHOTOCELL);
  digitalWrite(PHOTOCELL_PWR, LOW);
  pinMode(PHOTOCELL_PWR, INPUT);

}
//********************************************

bool doorClosed() {
  return data.status == 1;
}
//********************************************

void sendData() {
  bool sentPacket = false;
  byte cnt = 0;
  while (!sentPacket) {
    if (radioWrite(data)) {
      sentPacket = true;
      cnt = 0;
    } else {

      sleep(cnt * 5000);
      if (cnt < MAX_DELAY_AFTER_FAILED_SENT)
        cnt++;
    }
  }
}


//********************************************

bool lightIsOn() {
  return data.payload > LIGHT_THRESHOLD;
}

//********************************************

void loop() {

  readLight();
  data.status = digitalRead(BUTTON);
  data.battery = batteryRead();

  sendData();

  Radio.off();
  deepSleep();
  delay(100);  //debounce


}