intergrating with existing project car starter

[markjgabb]

hi everyone
so i have a project for a nfc car starter ive just recently completed....
i was wondering about integrating it into a node so that i could prestart and warm up my car in the mornings....

however ive never dreamed of mysensors before that last few months and prebuilding my own seems a little out of my league....

anyone have any advice on how i could integrate?
thanks in advance to anyone who can give me even a hint
this is running on an arduino nano

int accessories = 2; //accessory
int CarOn = 3; //power
int Starter = 4; //ignition
int indicatorPin1 = 5;
int indicatorPin2 = 6;
int indicatorPin3 = 7;
int indicatorPin4 = 8;
int handbrakePin1 = 9;
int carRunState = 0;
int handbrakeState = 0;
 
  #include <Wire.h>
  #include <PN532_I2C.h>
  #include <PN532.h>

  PN532_I2C pn532i2c(Wire);
  PN532 nfc(pn532i2c);
 
void setup(void) {
  pinMode(accessories, OUTPUT);
  pinMode(CarOn, OUTPUT);
  pinMode(Starter, OUTPUT);
  pinMode(indicatorPin1, OUTPUT);
  pinMode(indicatorPin2, OUTPUT);
  pinMode(indicatorPin3, OUTPUT);
  pinMode(indicatorPin4, OUTPUT);
  pinMode(handbrakePin1, INPUT);
  Serial.begin(115200);
  Serial.println("Hello! I'm a Car!");

  nfc.begin();

  uint32_t versiondata = nfc.getFirmwareVersion();
  if (! versiondata) {
    Serial.print(versiondata);
    Serial.print("PN53x key scanner board not online");
    while (1); // halt
  }
  
  // Got ok data, report state
  Serial.print("Reader Online1, ");
 
  
  // Set the max number of retry attempts to read from a card
  // This prevents us from waiting forever for a card, which is
  // the default behaviour of the PN532.
  nfc.setPassiveActivationRetries(0xFF);
  
  // configure board to read NFC tags
  nfc.SAMConfig();
    
  Serial.println("Waiting for a valid key");
}

void loop(void) {
  String ringUid;
  boolean success;
  uint8_t uid[] = { 0, 0, 0, 0, 0, 0, 0 };  // Buffer to store the returned UID
  uint8_t uidLength;                        // Length of the UID (4 or 7 bytes depending on ISO14443A card type)
  
  // Wait for an ISO14443A type cards (NFC Ring, Mifare, etc.).  When one is found
  // 'uid' will be populated with the UID, and uidLength will indicate
  // if the uid is 4 bytes (Mifare Classic) or 7 bytes (NFC Ring or Mifare Ultralight)
  success = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, &uid[0], &uidLength);
  
  if (success) {
    // Display some basic information about the card
    
//    Serial.print("  UID Length: "); Serial.print(uidLength, DEC); Serial.println(" bytes");
    Serial.print("  UID Value: ");
    for (uint8_t i = 0; i < uidLength; i++)
    {
      Serial.print("..");
      Serial.print(uid[i], HEX);
      ringUid += String(uid[i], HEX);
      

    }
    Serial.println(ringUid + "\n");
    if (ringUid == "42cbfd26f3f81" || ringUid == "4b4c22993c81" || ringUid == "4323222993c81" || ringUid == "4a2cd26f3f80"){
      Serial.println("Key accepted!");

  }
    
    
    if ((ringUid == "42cbfd26f3f81" || ringUid == "4b4c22993c81" || ringUid == "4323222993c81" || ringUid == "4a2cd26f3f80") && (carRunState == 0)){
      Serial.println("PERMISSION GRANTED, SYSTEMS ON");
      digitalWrite(accessories, HIGH);   // sets latching relay trigger on for ignition mode in car to allow start
      digitalWrite(indicatorPin2, HIGH); //show state, second LED
      //delay(100);                  // waits briefly
      digitalWrite(CarOn, HIGH);    // removes latching relay trigger
      delay(1500);
      carRunState = 1;
    }
    else if ((ringUid == "42cbfd26f3f81" || ringUid == "4b4c22993c81" || ringUid == "4323222993c81" || ringUid == "4a2cd26f3f80") && (carRunState == 1)){
     // if (handbrakeState = 0){if handbrake is on then safe to crank car, if not then skip this mode entirely
       { Serial.println("ENGINE CRANKING");
            delay(100);
       digitalWrite(Starter, HIGH);   // triggers output for engine starting
        digitalWrite(indicatorPin3, HIGH); //show state, third LED
        delay(1000);                  // waits for a second
        digitalWrite(Starter, LOW);    // removes triggered output 
      delay (1000);
        Serial.println("ENGINE CRANKING COMPLETE");
      }
      carRunState = 2;     
    }
    else if ((ringUid == "42cbfd26f3f81" || ringUid == "4b4c22993c81" || ringUid == "4323222993c81" || ringUid == "4a2cd26f3f80") && (carRunState == 2)){
     
       {
        
        digitalWrite(indicatorPin3, LOW); //turn off 3rd LED
                 // waits for a second
        Serial.println("ENGINE SHUTDOWN");
      //delay(200);                  // waits briefly  
      digitalWrite(CarOn, LOW);   //reset relay 
      digitalWrite(accessories, LOW);   
    delay(3000);
    carRunState = 0;
    digitalWrite(indicatorPin1, LOW); //LED1 off 
  }
  }
  }
}

[hek]

Cool project!
Just use a simple relay example. Insert the start-car code somewhere here:

https://github.com/mysensors/MySensors/blob/development/examples/RelayActuator/RelayActuator.ino#L83

[markjgabb]

@hek looks good...thanks for that ill investigate over the next week getting it running