SMART Home LED Lighting System and More

/*AC Light Control FOR 8 CHANNEL UNIT

Updated by Joey Pongallo
6/23/2018
JoeyPongallo@gmail.com

Revised code from Robert Twomey who Adapted from Ryan McLaughlin  

*/

#include  <TimerOne.h>			  // Avaiable from http://www.arduino.cc/playground/Code/Timer1
volatile int i = 0;               // Variable to use as a counter volatile as it is in an interrupt
volatile int i2 = 0;
volatile boolean zero_cross = 0;  // Booleans to store a "switch" to tell us if we have crossed zero
volatile boolean zero_cross2 = 0;

int channel1 = 4;                // Output to Opto Triac / Channels
int channel2 = 5;
int channel3 = 6;
int channel4 = 7;
int channel5 = 8;
int channel6 = 9;
int channel7 = 10;
int channel8 = 11;

int dim = 0;                    // Dimming level (0-128)  0 = on, 128 = 0ff
int dim2 = 0;
int dim3 = 0;
int dim4 = 0;
int dim5 = 0;
int dim6 = 0;
int dim7 = 0;
int dim8 = 0;


int freqStep = 65;    // This is the delay-per-brightness step in microseconds.
					  // For 60 Hz it should be 65
					  // It is calculated based on the frequency of your voltage supply (50Hz or 60Hz)
					  // and the number of brightness steps you want. 
					  // 
					  // Realize that there are 2 zerocrossing per cycle. This means
					  // zero crossing happens at 120Hz for a 60Hz supply or 100Hz for a 50Hz supply. 
					  // To calculate freqStep divide the length of one full half-wave of the power
					  // cycle (in microseconds) by the number of brightness steps. 
					  //
					  // (120 Hz=8333uS) / 128 brightness steps = 65 uS / brightness step
					  // (100Hz=10000uS) / 128 steps = 75uS/step


void setup() {                                    
	pinMode(channel1, OUTPUT);                          // Set the Triac pins as output
	pinMode(channel2, OUTPUT);
	attachInterrupt(1, zero_cross_detect, RISING);    // Attach an Interupt to Pin 2 (interupt 0) for Zero Cross Detection
	Timer1.initialize(freqStep);                      // Initialize TimerOne library for the freq we need
	Timer1.attachInterrupt(dim_check, freqStep);
	// Use the TimerOne Library to attach an interrupt
	// to the function we use to check to see if it is 
	// the right time to fire the triac.  This function 
	// will now run every freqStep in microseconds.    
	Serial.begin(9600);
}

void zero_cross_detect() {
	zero_cross = true;               // set the boolean to true to tell our dimming function that a zero cross has occured
	zero_cross2 = true;
	i = 0;
	i2 = 0;
	digitalWrite(channel1, LOW);       // turn off TRIAC (and AC)
	digitalWrite(channel2, LOW);
}

// Turn on the TRIAC at the appropriate time
void dim_check() {
	if (zero_cross == true) {

		if (i >= dim) {
			//Serial.println(i);
			digitalWrite(channel1, HIGH); // turn on light       
			i = 0;  // reset time step counter                         
			zero_cross = false; //reset zero cross detection
		}
		else {
			i++; // increment time step counter                     
		}
	}

	if (zero_cross2 == true) {
		if (i2 >= dim2) {
			//Serial.println(i2);
			digitalWrite(channel2, HIGH); // turn on light       
			i2 = 0;  // reset time step counter                         
			zero_cross2 = false; //reset zero cross detection
		}
		else {
			i2++; // increment time step counter                     
		}
	}

}

void loop() {

	/*Serial.println(dim);
	Serial.println(dim2);
*/
/*if (dim >= 199)
	dim = 199;
if (dim <= 5)
	dim = 5;*/


	if (Serial.available() > 0) {

		//char data = Serial.read(); // reading the data received from the bluetooth module
		int value = Serial.parseInt();

		if (value > 1000 && value < 2000) {

			dim = value - 1000;
			dim = filterDimmingValue(dim);
			Serial.println("Channel1: " + dim);
		}

		if (value > 2000 && value < 3000) {
			dim2 = value - 2000;
			dim2 = filterDimmingValue(dim2);
			Serial.println("Channel2: " + dim);
		}

		// Turn all lights off
		if (value == 0) {
			dim = 128;
			dim2 = 128;
		}

		// Turn all lights on max
		if (value == 9999) {
			dim = 5;
			dim2 = 5;
		}


	}

	delay(5);
}


int filterDimmingValue(int value) {
	if (value > 128)
		value = 128;
	if (value < 5)
		value = 5;
	return value;
}