Feb 1, 2019

How Fob Key Works

Fob key is a remote keyless entry system available on modern cars, it helps you locate your car easily especially in crowded parking lots and also reduce the risk of your car being stolen. A key fob will also help prevent others from capturing the code your key transmitter is sending (when someone has access to your code, they can easily re-transmit the codes to steal your car. The Key fob is a miniaturized and computerized key that works with a small chip that creates the codes that are transmitted while the small silver can is the transmitter on the key fob. 

The controller on the fob makes use of a hopping code to provide security. There are possible 1 trillion codes that can be programmed in your key fob, thanks to the controller chip. The controller chip in the transmitter has a wide memory that can hold 40-bit code, hence when you push a button on the key fob, it will automatically send the 40-bit code along with the function code that instructs the car what you want it to do (for instance it directs the car to lock or unlock the doors or open the trunk).

Functions of the receiver and transmitter in the key fob

Both the transmitter and receiver in your key fob rely on the same pseudo-number generator. The transmitter makes use of this random number generator to send 40-bit codes before it performs that requested function in your car. The code generated by the receiver is stored in the memory. When the receiver receives a valid code, on the other hand, it makes use of the same random number generator to pick a new random number. This means the transmitter and the receiver are synchronized but the receiver functions only when it receives codes it was expecting. 

If you are about a mile away and accidentally push the button on your key fob transmitter, the transmitter and receiver at this point will not be synchronized then the receiver will resolve this issue by accepting any from among the 256 possible codes from the random sequence and doing this means you can accidentally push the button on the key fob, up to 256 times before the receiver accepts the transmission but it wouldn’t receive the transmission against on the 257th accidental push of the button. 

Contact Smart Locksmith for reprogramming and repair of the key fob

The synchronization of your key fob transmitter with the receiver can become problematic especially after prolonged usage, and that is the reason why you need to check your key fob for servicing from time to time to ensure it is working efficiently. Sometimes the button may fall off, and the inscriptions may even vanish, which can create confusion sometimes when you use the key fob, in which you may press the wrong button. Smart Locksmith has remained at the forefront of key gob programming and reprogramming over the years, we will surely help you out with all key fob issues. Give us a call today!

  • Emergency Locksmith

    We have helped clients resolve many emergency locksmith situations such as auto, commercial and residential lockout, break-ins and security breach cases. It is our ultimate goal to provide quick and efficient services 24 hours, 7 days a week to residents of Atlanta, and surrounding areas. 

  • Security Lock Installation

    We offer optimum services because security lock installation is expected to be an essential consideration for everyone.  Smart Locksmith provides top quality security lock installation services in Alpharetta and across several cities like Roswell, Johns Creek, Peachtree Corners, Milton, Duluth, Sugar Hills, Norcross, and Cumming.

  • Lockout Service

    We know how frustrating it is to be locked out of your home or vehicle, but we advise you not to break a window or forcefully gain entrance into the house – you will spend more money to get things fixed, and such actions are dangerous.

  • Auto Locksmith

    Locking yourself out of the car can be a frustrating experience which no one desire to have. Unfortunately, it can happen to just anyone and can jeopardize your day. However, if you are in such a situation now, never worry because we’ll be right there to offer professional locksmith help.

Schedule Locksmith Services

Are you locked out and need auto, commercial or residential emergency locksmith service? Call the experts at Smart Locksmith as we offer 24 Hour locksmith in The Metro Atlanta. Smart Locksmith is a Google Guaranteed locksmith services provider. We have completed all background and business license check done by Google. Contact us now to schedule reliable locksmith services in Atlanta area.

Affordable & Fast Locksmith Service
Locksmith Atlanta
Smart Locksmith is trusted for mor than 15 years and offer certified comercial, residential and automotive lock change, high security lock installation, lockout service, deadbolt replaement, key fob programming, rekeying, safe opening, mailbox locksmith, car key replacement in Atlanta all surrounding areas in Georgia.

Smart Locksmith

310 Prospect Pl, Alpharetta, GA 30005 Map
© All Rights Reserved.

Privacy Policy

Quick & Reliable Locksmith Services

Please fill in the form below and submit to schedule nearby locksmith. Smart Locksmith in Atlanta offers 24 Hour affordable and fast locksmith service for over 15 years. Our dependable locksmith technicians are standing by to help you to unlock your residential, commercial property and automotive in Atlanta, GA and all nearby locations.

  • Enter Security Code: 123