DK-bluetooth-controlled-relay

HostChoice.net: DK-bluetooth-controlled-relay
Posted in: code | by HostChoice.net | 2016 Dec 21


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The original code was found on

http://forum.arduino.cc/index.php?topic=248686.0

but there were a lot of errors in the format.

After working out most of the bugs, this version is able to handle as many relays as there are digital i/o pins.

Note: I just thought of a marketable product based on this. A backup replacement for broken turn signal on vehicles. We need a turn left, turn right, stop, flash, alternate flash.

Thanks!

// code 404303225c

#include <SoftwareSerial.h>

SoftwareSerial mySerial(6,7);

//----Global variables for the pins---//
int pin1 = 6;
int pin2 = 7;
int pin3 = 8;
int pin_array[8];
char status[3][10] = { "off", "on" };

int NUMBER_OF_PINS = 3;

int pinLED = 13;

//Initialise for the Arduino setup for OUTPUT to the pins designated as ints
void setup()
{
   Serial.begin(9600);
   pinMode(pin1,OUTPUT);
   pinMode(pin2,OUTPUT);
   pinMode(pin3,OUTPUT);
   digitalWrite(pin1,LOW);
   digitalWrite(pin2,LOW);
   digitalWrite(pin3,LOW);

pinMode(pinLED,OUTPUT);
   digitalWrite(pinLED,LOW);

pin_array[0] = pin1;
   pin_array[1] = pin2;
   pin_array[2] = pin3;

}

void turn_relay_on(int parameter) {
   int pin = parameter - '1';
   char display_string[80];

if ((pin < 0) || (pin > (NUMBER_OF_PINS-1))) {
      sprintf(display_string, "RelayOn: Invalid pin number %d %c\n", pin,
	          parameter);
      printf("%s", display_string);
      return;
   }
   digitalWrite(pin_array[pin],HIGH);
   digitalWrite(pinLED,HIGH);
}

void set_LED_status() { 
   int pin = 0;
   int any_high = 0;

for (pin = 0; pin < NUMBER_OF_PINS; pin++)  {
       if (digitalRead(pin_array[pin]) == HIGH) {
          digitalWrite(pinLED, HIGH);
          return;
       }
    }
    digitalWrite(pinLED, LOW);
}

void turn_relay_off(int parameter) {
   int pin = parameter - '1';
   char display_string[80];

if ((pin < 0) || (pin > (NUMBER_OF_PINS-1))) {
      sprintf(display_string, "RelayOff: Invalid pin number %d", pin);
      Serial.println(display_string);
      return;
   }
   digitalWrite(pin_array[pin],LOW);
   set_LED_status();
}

void toggle_relay(int parameter) {
   int pin = parameter - '1';
   char display_string[80];

if ((pin < 0) || (pin > (NUMBER_OF_PINS-1))) {
      sprintf(display_string, "Toggle Relay: Invalid pin number %d", pin);
      Serial.println(display_string);
      return;
   }

digitalWrite(pin_array[pin], !digitalRead(pin_array[pin]));
   int state = digitalRead(pin_array[pin]);
   sprintf(display_string, "Relay%d: %s", pin, status[state]);
   // sprintf(display_string, "Relay%d: %s", pin, digitalRead(pin_array[pin]));
   Serial.println(display_string);

set_LED_status();
}

void disp_single_state(int pin) { 
   char display_string[80];

int state = digitalRead(pin_array[pin]);
   sprintf(display_string, "Relay%d: %s", pin, status[state]);
   Serial.println(display_string);
}

void display_status(int parameter) {
   int pin = parameter - '1';
   int state = 0;

if (parameter == 'a') {
      Serial.println("===/STATE OF PINS\===");
     // subtract 1 from line below       1
      for (pin = 1; pin < NUMBER_OF_PINS+1; pin++) {
         disp_single_state(pin);
      }
      Serial.println("===\STATE OF PINS/===");
      return;
    }           
    disp_single_state(pin); 
}

void loop()
{
   char command;
   char parameter;
   char display_string[80];

if (!Serial.available())
      return;

delay(100);
   while (Serial.available() > 0) {
      command = Serial.read();
      parameter = Serial.read();
      switch (command) {
      case '1':
         turn_relay_on(parameter);	
         break;

case '2':
         turn_relay_off(parameter);
         break;

case '3':
         toggle_relay(parameter);
         break;

case 's':
      case 'S':
         display_status(parameter);
         break;

default:
         sprintf(display_string, "unhandled command %c", command);
         Serial.println(display_string);
      }

} // end while
} // end void

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