alt option to active rfid

Hey guys,

I'm planning on making a keyless entry and pushbutton start for my classic car. I have found an active rfid fob from china that was arduino compatible, but it doesn't sound like it has any security features built into it. I want to explore some other solutions that will help me achieve my goals:

  • Secure: possibly writing a rolling code feature

  • No user interface: I want the doors to unlock when i approach the vehicle. as long as it's getting a signal it will allow me to start the car. if the fob is out of range then it locks the doors and deactivates the starter mechanism.

  • Low Power, I'd like for this to not drain my car battery on the vehicle side of things and i'd like for it to last months on a coin cell battery.

Some options I have been considering: limit the range of one of these by adjusting the size of the antenna: http://www.kickstarter.com/projects/flutterwireless/flutter-20-wireless-arduino-with-half-mile-1km-ran?ref=search

or possibly Bluetooth ble http://www.kickstarter.com/projects/kytelabs/bleduino-bluetooth-40-ble-made-easy-arduino-compat?ref=search

but i'm not sure that either one of these will be a good option. can anyone give me some advice, or a direction to look to for a possible solution to my project?

thanks,

scott

Hello Scott,

Did you already have your project working. I'm also looking for the part: "No user interface"...........

If you do, will you share it with me?

Thanks. Jan Hein

Hey Jan,

I haven't made any headway on this project. I did back this a while back: https://launch.punchthrough.com/

and I'm waiting for it to arrive. Hopefully i can figure out some alternative

just talked to these guys, i think this is the solution i'm going to end up using: http://www.rfdigital.com/product/rfd21815-eval-board-for-rfd21733/ http://www.rfdigital.com/product-category/keyfob-remotes/

janhein: Hello Scott,

Did you already have your project working. I'm also looking for the part: "No user interface"...........

If you do, will you share it with me?

Thanks. Jan Hein