Codigo para rodar no Spark Photon e funcionar com o watchdog no ATTiny85

attiny85-watchdog.ino

   /*
Spark Cyan Flash of Death Killer - by Scott Lichtenstein (StartGroup) 
Open Sourcec - Please feel free to do whatever you want with this! :)
 */

const int resetButton = 0; // pin that will flip the reset switch
int sensorValue = 0;  // variable to store the value coming from the Spark pin
int sensorPin = 3;    // pin from Spark Core
int sensorState;   // holds current state of pin from Spark Core 
int lastTriggerState = LOW;   // the last successful read of the Spark Core pin
long lastTriggerTime = 0;  // the last time the state was changed

void setup() {
  delay(10000);  // wait 10 seconds for the core to connect.
  pinMode(resetButton, OUTPUT); // call the resetbutton pin as an output
  pinMode(sensorPin, INPUT);  // call the sernsorPin as an input
  digitalWrite(resetButton, HIGH);   // Keep reset pin at high until further notice
}

void loop() { // here starts my loop

  setState(); // checks the sensor and sets value to 1 or 0 depending on its value

  if (sensorState != lastTriggerState) { // checks if pin is the same or different from last time.
  lastTriggerTime = millis(); // sets new time for change
  lastTriggerState = sensorState;  // changes new state
  } 

  if ((millis() - lastTriggerTime)>10000){ // if it has been more than 10 seconds since the state has changed, do a reset
     reset(); // activate reset function
  }
}
void reset(){ // here is the reset function
  digitalWrite(resetButton,LOW); // Push Reset button 
  delay(1000); // Wait
  digitalWrite(resetButton,HIGH); // Let go of Reset button
  delay(30000); // wait 30 deconds for reconnect prior to checking again
}

void setState(){ // here is the set state function, number varibles are just to identify change in state.
  sensorValue = analogRead(sensorPin); // check for spark pin
  if (sensorValue < 500)  // if analog value is less than 500, set to variable 0
{
  sensorState = 0; // variable 0
}
if (sensorValue > 500) // if analog state is more than 500, set to varible 1
{
  sensorState = 1; // varible 1
}
}

photon-watchdog.ino

int trigger = A7; // this is the pin talking to the attiny
int led = D7; // this is the led pin for a visual indicator that things are running, it is optional
uint32_t lastKick = 0; // last time we kicked the watch dog
bool s = false; // output state of the watch dog

void setup()
{
  lastKick = millis(); // We just powered up
  pinMode(trigger, OUTPUT); // set signal pin to output
  pinMode (led, OUTPUT); // set led pin to output
}

void loop() {
  kickTheDog(); // kick the watchdog

  ////////////////////////////
  // place normal code here //
  ////////////////////////////

} // End main loop (currently runs every 5-6 ms)

void kickTheDog() { // kick the dog every 5 seconds
  if( (millis()-lastKick) > 5000 ) {
    lastKick = millis();
    s = !s; // toggle the outputs
    digitalWrite(led,s); // watchdog indicator
    digitalWrite(trigger,s); // watchdog signal
  }
}