/*
 -----------JTM Light Tower Latch switch----------------
 created 2022
 by JTM Technologies, inc.  
 <http://www.jtmtechnologies.com>
 modified 7/8, 2022
 by Lowell Dodge

Read digital input for tool active/idle and tool alarm
turn on/off 3 light tower lights, green-amber-red

                 -----Truth table----- 
  ----conditions----         RED     GREEN    AMBER    AUDIO
                          ---------------------------------
  (1) idle/no alarm        |  F        F        T         F
  (2) active/no alarm      |  F        T        F         F
  (3) Idle/alarm/audible   |  T        F        T         T
  (4) Idle/alarm/silent    |  T        F        T         F
  (5) Active/alarm/audible |  T        T        F         T
  (6) Active/alarm/silent  |  T        T        F         F
   
 ----------The circuit:--------------
 * pcb uses a 24v relay activated by idle/active input from send indexer 
 * interface pin pin 20(adio-9 DO-1), the relay contacts are connected 
 * to arduino 5v and pin 9
 * 
 * pcb uses 24v relay activated by system audible alarm adio 7 DO-14, 
 * the relay contacts are connected to arduino 5v and pin 10
 * 
 * the 24V is connected to  P1 pin 1 and P2 pin 7 which sends pwr to light 
 * tower yellow wire 
 * 
 * the AMBER led output is arduino pin 11 and drives a 
 * 5v relay which connects common to the light tower orange wire
 * 
 * the GREEN led output is arduino pin 12 and drives a 5v relay which 
 * connects common to the light tower green wire
 * 
 * the RED led output is arduino pin 5 and drives a 5v relay which 
 * connects common to the light tower red wire 
 * 
 * the AUDIO output is connectoed to arduino pin 6 and drives a 5v relay 
 * which connects common to the light tower purple wire (audio)
 * 
 * the AUDIO silence button is connected to arduino pin 7 (input) which will 
 * silence the buzzer while alarm is active
 *  
 */

// constants that  won't change. They're used here to set pin numbers:

const int alarmactive = 10;    // the number of the alarm state pin
const int toolwentidle = 9;   // the number of the idle state pin
const int amber =  11;       // the number of the amber LED pin
const int green =  12;      // the number of the green LED pin
const int red =  5;        // the number of the red LED pin
const int audio =  6;     // the number of the audible pin
const int silence =  7;  // the number of the silence pin

// variables that  will change:

int idlestatus = 0;           // variable for active/idle status 1=idle
int alarmstatus = 0;         // variable for alarm status 1=alarm
int silencestatus = 0;      // variable for alarm silence status 1=silent

void setup() {
         // initialize the LED pins as an outputs:
         
  pinMode(green, OUTPUT);
  pinMode(amber, OUTPUT);
  pinMode(red, OUTPUT);
  pinMode(audio, OUTPUT);
 
  
        // initialize the idle,alarm, and silent pins as an input:
  
  pinMode(toolwentidle, INPUT);
  pinMode(alarmactive, INPUT);
  pinMode(silence, INPUT);
}

void loop() 

{
        // read the state of the idle,alarm,and silence status values:
        
  idlestatus = digitalRead(toolwentidle);
  alarmstatus = digitalRead(alarmactive);
  silencestatus = digitalRead(silence);
  
       // check if the alarm status is true.
      // if it is, alarmstatus is HIGH:
      
   if (idlestatus == LOW)
  
    {
  
    // if tool is active
    
    digitalWrite(green, HIGH);
    digitalWrite(amber, LOW);
    digitalWrite(red, LOW);
 
    }  
   else if (idlestatus == HIGH)
  
    {
  
    // if tool is idle
    
    digitalWrite(green, LOW);
    digitalWrite(amber, HIGH);
    digitalWrite(red, LOW);
  
  } 
     if (silencestatus == LOW && alarmstatus == LOW) 
{   
     // If no alarm, turn off red and audio
      
    digitalWrite(red, LOW);
    digitalWrite(audio, LOW);
  
}
else if (silencestatus == LOW && alarmstatus == HIGH)
  
    {
  
    // If alarm is true and silence button is not pressed 
     
    digitalWrite(red, HIGH);
    digitalWrite(audio, HIGH);
    delay(3000);  // delay to sync red light w/sonalert
    
  }
     else if (silencestatus == HIGH && alarmstatus == HIGH) 
{   
     // If alarm is true, and silence button is pressed
      
    digitalWrite(red, HIGH);
    digitalWrite(audio, LOW);
    delay(3000);   // delay to sync red light w/sonalert
}      
  }