[WIP] NFC car starter by MrStein

[MrStein]

the board, normaly ready for the integration in a car :
(components from John, electronical help by Lokki & Duncan )
TOP:

BOTTOM:

(latching relay is in the bottom side after a eagle design problem, but I think i'll work fine. )

schematics:
http://i39.servimg.com/u/f39/13/54/23/66/v210.png

EAGLE file

[Lokki]

So much prettier than mine, @MrStein, that's awesome. ;-)

[johnyma22]

Okay so the problem we hit in implementation is the BMW has a hall sensor for the push button, this makes life somewhat difficult.

We're investigating the possibility of interfacing with a third party remote starter module and also ways to replicate the hall sensor signal.

The source code is written for V2 and I sent through to @MrStein

Also note I just spoke to a BMW remote start expert and the car I chose is one of the hardest ones to interface with because of the way they implemented the electronics. Any other car up to a 7 series would be fine..

I have such bad luck.. Will trade in this 7 series and get a different car to hack on...

*grumbles.

[Lokki]

Ouch. The focus would perhaps have been easier... Still, if you can make it work on the beemer you can do it on anything.

[MrStein]

UP! Some news about the project !

First I have some electronical test from my 407 peugeot:
The current from the contact in the neiman is about 9.5mA, the stater contact is at 17mA. So a 3A relay will work fine.

I start a new version with a ATMEGA328 and a 16MHz crystal. You also have a BLUETOOTH 4.0 connector for a further version.

The board:

The circuit with a 3d printed box

(miss the atmega healder & a led)

(letters are bad)

I give all the schématics / 3D drawing after some tests :)

[MrStein]

After some test, a new proper version (10 pcb for 10$):

I solder all when I have more time .

[johnyma22]

Excellent work @MrStein - I think one thing we should be doing is holding a few of these pre-made in stock so people can purchase them through store.nfcring.com

[MrStein]

As you want john, I add some modification to the second board (capacitor value en package) so I would like to test them before give all the files.
After it's an open source project so use them as you want :)

[MrStein]

Fun with the starter, useless but for science of course !

But with that test, I know that my car need 500ms delay between the contact & the starter. and more than 800ms after that to launch the engine.

[MrStein]

Here are the files of new optimised version, click on "téléchargement gratuit" :)
http://www.partage-facile.com/E8RQRYP85C/atmega_v3_nfc_starter.zip.html

A new 3d printed box will follow, in open source too :D

[Raymond]

This looks fantastic. I'm curious, @MrStein, ou wrote "The keys are currently in this version to avoid problems related to the anti-starter. It will be neutralized (bypassed) later on." in the first video. Did you insert the keys in the "On" state in your car before scanning your ring? Great project!

[MrStein]

Now, I use a deported antenna to connect to the neiman (were you put the key) the immo chip.
this is not the best solution but it s difficule to emulate the immo signal so it's the easiest ;)
I had make some "how to" for connection between the neiman & the board, and how to supply. For now they are on my youtube (mrstein) but in french..
I will make another video for bypass the immo ;)

maybe if I have the time I will make a instructable for all (making the board, connection, bypass), but as you can read, my english is not realy good for translate a full text ^^"

[Raymond]

That's very cool. English would be great for everyone, but I can read French just as well. Keep it up! Can't wait for your next update ;) Lâche pas la patate!!!

[MrStein]

The code, with sleep mode and interrupt. Work fine with the board (you have to plug a 10Kohms resistor 0603 cms between the +5v and int1, it will be rectifed with another version)

http://fr.sourcepod.com/pwdatf37-45351

/*
 Code par MrSTEIN (mrstein(at)hotmail.fr)
 v1.0/ 01/10/2014
 compatible avec NFC starter V3.0

 configuration harware:
 interruptBRAKE 3
 BRAKE 4
 buzzer 5
 RelaisStarter 6
 RelaisContact_OFF 7  
 RelaisContact_ON 8
 LED 13    

 informations hardware:
 1flash: CONTACT
 2flash: STARTER
 1buzz: SLEEP
 2buzz: STOP
 */    

  #include <Wire.h>
  #include <PN532_I2C.h>
  #include <PN532.h>
  #include <avr/sleep.h>
  #include <avr/power.h>


//definition des clefs  
String CLEF1 = "xxxxxxxxxxxxx";
String CLEF2 = "xxxxxxxxxxxxx";

#define interRelais 500 // temps entre contact et starter
#define tempsStarter 500 // temps starter ON 

//definition des sorties, valable pour la v3  
#define interruptBRAKE 3
#define BRAKE 4
#define buzzer 5
#define RelaisStarter 6
#define RelaisContact_OFF 7  
#define RelaisContact_ON 8 
#define LED 13  

PN532_I2C pn532i2c(Wire);
PN532 nfc(pn532i2c);
boolean etatContact = false;
boolean etatBRAKE = false;


//*******************fonction buzzer
void fct_FLASH(int pulse){
  for(int i=0; i<pulse; i++){
  digitalWrite(LED, HIGH);
  delay(200);
  digitalWrite(LED, LOW);
  delay(200);
}
}  

//*******************fonction buzzer
void fct_BUZZ(int pulse){
  for(int i=0; i<pulse; i++){
  digitalWrite(buzzer, HIGH);
  delay(200);
  digitalWrite(buzzer, LOW);
  delay(200);
}
}

//*******************fonction contact
void fct_contact(){
fct_FLASH(1);
digitalWrite(RelaisContact_OFF, HIGH);
delay(500);
digitalWrite(RelaisContact_OFF, LOW);  
etatContact = true;
}
 
//*******************fonction starter
void fct_starter(){
fct_FLASH(2);
digitalWrite(RelaisStarter, HIGH);
delay(tempsStarter);
digitalWrite(RelaisStarter, LOW);
}

//*******************fonction STOP, interrupt sur BRAKE
void fct_STOP(){
delay(1000);
if(!digitalRead(BRAKE)){
fct_BUZZ(2); 
digitalWrite(RelaisContact_OFF, HIGH);
delay(500);
digitalWrite(RelaisContact_OFF, LOW); 
Serial.println("STOP");
etatBRAKE = true;
etatContact = false;

while(!digitalRead(BRAKE)){delay(500);}
etatBRAKE = false;
Serial.println("FREIN OFF");
}
else fct_DODO();
}

//*******************fonction lecture de tag
String fct_lecture(){
  String Received;
  boolean success;
  uint8_t IdReceived[] = { 0, 0, 0, 0, 0, 0, 0 }; 
  uint8_t Id_Length; 

if (success = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, &IdReceived[0],&Id_Length)){
for (uint8_t i=0; i < Id_Length; i++)
 Received += String(IdReceived[i], HEX); 
return(Received);
}
else
return(0);
}

//*******************fonction MODE sleep
void fct_DODO(){
 delay(1000);
 fct_BUZZ(1); 
 Serial.println("ARDUINO entre en mode sleep");
attachInterrupt(1,REVEIL, LOW);
delay(100);
  set_sleep_mode(SLEEP_MODE_PWR_DOWN); 
  sleep_enable();
  sleep_mode();
Serial.println("ARDUINO reveil");
fct_STOP();
}

//*******************fonction reveil
void REVEIL(void){
detachInterrupt(1);
}

void setup(void) {
  pinMode(buzzer,OUTPUT);
  pinMode(RelaisStarter,OUTPUT);
  pinMode(RelaisContact_ON,OUTPUT);
  pinMode(RelaisContact_OFF,OUTPUT);  
  pinMode(LED,OUTPUT);
  digitalWrite(LED, LOW);
  digitalWrite(buzzer, LOW);
  pinMode(BRAKE,INPUT);  
  delay(100);
//if(!digitalRead(BRAKE))fct_STOP(); // en cas de reset forcé, securite
  Serial.begin(115200);
  Serial.println("start"); 
  nfc.begin();
  uint32_t versiondata = nfc.getFirmwareVersion(); 

  if (! versiondata) {
    Serial.println("erreur pn532");  
    while (1); // halt
}
  nfc.setPassiveActivationRetries(0xFF);
  nfc.SAMConfig();
Serial.println("CAR STARTER V1.0");  
}


void loop(void) {
String Received;
while(etatContact == false){
Serial.println("attente lecture pour contact"); 
Received=fct_lecture();

if ((Received == CLEF1 || Received == CLEF2)){  
Serial.println("Clef valide, contact");  
fct_contact();
delay(interRelais);
}
}

while(etatBRAKE == false){
Serial.println("attente lecture pour starter");   
if(digitalRead(BRAKE)) etatBRAKE = true;
Serial.println(digitalRead(BRAKE));
Received=fct_lecture();

if ((Received == CLEF1 || Received == CLEF2) ){ 
Serial.println("Clef valide, starter");
fct_starter();
}
}
delay(100);
if(etatBRAKE == true){
fct_DODO();
}
}

A video of the plugging in the car will come, maybe if I have some translation help I could make an instrutable.

edit: sorry, not a lot of comment (and in french), but I think it's not too difficult to understand.

[Lafunamor]

post your text on some collab tool in french and if I have some spare time I'll try to help you to translate it.

[Techcaveman]

Hey @MrStein this looks great! If I was still tech savvy like in high school I would love to do a home build! Seeing how I'm only a little tech savvy now, what's the odds of being able to buy one of these? I just got my hands on my NFC ring thanks @NFC-Ring-Team can't wait to integrate this into my day to day!

[MrStein]

You can make one with the eagle files if you know how solder the components (I will make a bill of material soon) ;)
Maybe I can give you a blank prototype board, but you still need to buy the components ;)

[MrStein]

here is the board finished:

Black jumper is for simulate the brake
blue&brown are supply
brown, blue & yellow/green are contact & starter.
I also make some videos for show how plug this device & how supply, bypass the immo,... (in french)
https://www.youtube.com/playlist?list=PLBiQyVl185A4OzemFMIH5aewKNF8k3Xg1
Part1: neiman connection
Part2: supply
Part3: bypass immo
Part4: the board explication & conception

Next video will be the brake connexion & global connection

[DaStivi]

Hi, any Update on this Project yet?

how do you unlock the doors of your car? did i missed this here anywhere?

i'm planning to implant an nfc tag in my hand... and really would like to unlock/start my car (Citroen) with the nfc tag too! :)

steve

[MrStein]

Hi steve !
Maybe a NFC ring is better than make an implant ;) A lot of implant are in 125khz, so my board cannot work at this frequency (it's 13.56Mhz-> NFC)
For the door I don't make any board but it's easy to make with the same board than the NFC starter one.

The starter project is finished for me, I need to make the last tutorial video (in french) and after that make a instructable.

Pierre