Well, it’s that time of year again… Halloween Prop building time! This years prop requires help with the code that will enable several boards to shake that are covering a window.
I have a photon in a v2 relay shield powering 2 separate 12VDC automotive door lock actuators. Each actuator is connected to 2 wooden boards. I flashed the Photon with one of the library relay shield programs to test it out, and it works fine. Now it needs a little coding magic that I cannot provide.
I ordered a motion sensor that is taking its sweet time getting here. I would like it to trigger a routine. I do not know if the trigger will be high or low as of right now.
Currently, the code turns all relays on and off continuously by a time I specify. I would like the actuators to alternate so that all boards aren’t shaking in unison. Additionally, there should be a time limit on the total runtime per triggering episode.
Any help would be greatly appreciated!
Something like this?
if (triggered){
for(uint8_t i = 3; i <= 7; i++ ){
if(i != 7) digitalWrite(i,HIGH);
if(i != 3) digitalWrite(i-1,LOW);
delay(1000);
}
}
Assuming you are using the default pins on the relay shield V2
This sure looks fun! 
My apologies, I am not very well versed in code.
Is that for the motion sensor only?
I am using the default Particle App “2-control-all-relays.ino”.
I have modified some code that was written for me by harrisonhjones. It worked a week ago, now it is unpredictable. Can someone look at it and help me fix it?
int RELAY1 = D3;
int RELAY2 = D4;
int MOTION1 = D0;
unsigned long lastMotionTime = 0;
int propDelay = 250; // In milliseconds(1/4 second)
int propOnTime = 10000; // In milliseconds(10 seconds)
int state = 0; // Normal operation = 0, Waiting to actuate prop in 1/4 second = 1, Actuating props for 10 seconds = 2
void setup()
{
// Initilize the pins
pinMode(RELAY1, OUTPUT);
pinMode(RELAY2, OUTPUT);
pinMode(MOTION1, INPUT);
// Initialize all relays to an OFF state
digitalWrite(RELAY1, LOW);
digitalWrite(RELAY2, LOW);
// Register two functions, one to allow for individual actuation of each relay and the other to test the effect
Spark.function("relay", relayControl);
Spark.function("test", test);
}
void loop()
{
// In the normal "reset" state wait for a LOW signal on the motion detector. When that motion is seen record the time and go to the next state
if(state == 0)
{
if(digitalRead(MOTION1) == HIGH)
{
lastMotionTime = millis();
state = 1;
}
else
{
// In the normal state the relays should not be ON"
digitalWrite(RELAY1, LOW);
digitalWrite(RELAY2, LOW);
}
}
// Wait for 10 seconds then go to the next state
else if(state == 1)
{
if((millis() - lastMotionTime) > propDelay)
{
state = 2;
}
}
// For the next 20 seconds bring the relays "ON". Once 20 seconds has passed go back to the normal or "rest" state
else if(state == 2)
{
if((lastMotionTime + propOnTime) < millis())
{
state = 0;
}
else
{
digitalWrite(RELAY1, HIGH);
delay(75);
digitalWrite(RELAY2, HIGH);
}
delay(100);
{
digitalWrite(RELAY1, LOW);
delay(200);
digitalWrite(RELAY2, LOW);
}
delay(75);
{
digitalWrite(RELAY1, HIGH);
delay(400);
digitalWrite(RELAY2, HIGH);
}
delay(100);
{
digitalWrite(RELAY1, LOW);
delay(100);
digitalWrite(RELAY2, LOW);
}
}
// Catch any mistakes and just go back to the normal state
else
{
state = 0;
}
}
int test(String command)
{
// To test just simulate a low signal on the motion
lastMotionTime = millis();
state = 1;
}
// Taken from the relay example code in the SparkCore docs
// command format r1,HIGH
int relayControl(String command)
{
int relayState = 0;
// parse the relay number
int relayNumber = command.charAt(1) - '0';
// do a sanity check
if (relayNumber < 1 || relayNumber > 3) return -1;
// find out the state of the relay
if (command.substring(3,7) == "HIGH") relayState = 1;
else if (command.substring(3,6) == "LOW") relayState = 0;
else return -1;
// write to the appropriate relay
digitalWrite(relayNumber-1, relayState);
return 1;
}