This key chip is actually RFID, in fact, is a contactless swipe card system (there are also contactless swipe cards not discussed here), he is a radio frequency system, the electricity on the chip is obtained by radio frequency induction, microwave induction principle is used at high frequency, electromagnetic induction principle is used at low frequency, after induction, the chip sends its own information back.
At present, according to international standards, RFID has 900M, the distance is about 5 meters, the distance of 13M is about 20 centimeters, and the distance of 125K is about 1 centimeter. There is also a domestic standard of 433M. 125K is now only used on the car, other places are not used, is the original product, such as bus card and so on are 13M.
The old key principle you are currently trying will work, but the chip distance is not enough because the coil reader is embedded in it and your old key is out of reach. I don't know if I made myself clear.
Key chip principle: The car key chip is a magnetic chip system. Magnetic chip systems are passive in nature. That means they don't need electrical power, and they don't need their own superpowers.
They operate on a frequency of 125 KHZ.
When there is no external and own energy support, its transmission range is limited, only within 1 to 15 meters. In many automotive chip systems, key recognition is similar.
When a key is inserted into the ignition lock and turned to the \"on\" or \"run\" position, the reading coil of the ignition lock core will read the chip of the key; The chip has a fixed digital information, the coil will read out the digital information and anti-theft system stored digital information check, once consistent will continue the next step of vehicle launch; Otherwise, do not perform the following steps.