When a specific radio frequency is detected a notification will sound.
Example: A specific radio frequency is transmitted from a device in my car. A portable device is with me at home. When the car returns home, the portable device detects the specific radio frequency being transmitted from the car and makes a sound to notify that the car is home.
What equipment would enable this?
Thank you
Example: A specific radio frequency is transmitted from a device in my car. A portable device is with me at home. When the car returns home, the portable device detects the specific radio frequency being transmitted from the car and makes a sound to notify that the car is home.
What equipment would enable this?
Thank you
