You want to collect cars from all over the country ?
Not really. I can only use one at a time anyway.
What do mean by resonator ?
That's what the datasheet called the part that is referred to as the transmitter in tutorials for increasing the range of your key fob. I'm rather unclear as to exactly what it does.
You could mimic the buttons with by soldering reed relais parallel to the buttons and use the Arduino to activate the buttons.
I was thoroughly unable to solder wires to these contacts, or any of the other parts which they were connected to via traces
I'm looking for a way to get an Arduino to emulate the function of an off the shelf key fob - the kind that you can program your vehicle to respond to - using as few parts as possible as my budget is tight right now.