Case of portable terminal and method for controlling smart key of portable terminal

A non-transitory computer-readable storage medium storing one or more programs comprising instructions which, when executed by an electronic device, cause the device to execute a plurality of operations, wherein the plurality of operation comprise:

• in response to detecting coupling with a electronic device case, supplying, at the electronic device, power to a smart key included in the electronic device case having a hardware key button for controlling a vehicle;
• determining, at the electronic device, whether a strength of a signal received from the vehicle is equal to a preset reference signal strength or above the preset reference signal strength by communicating with the smart key;
• in response to determining that the strength of the signal received from the vehicle is equal to the preset reference signal strength or above the preset reference signal strength, displaying, at the electronic device, a first guide message and a second guide message on a screen of the electronic device;
• receiving, at the electronic device, unique information for controlling of the vehicle from the smart key;
• in response to detecting a user input at the hardware key button, remotely controlling the vehicle based on the unique information through the hardware key button;
• in response to determining that the user input is not detected at the hardware key button, determining whether a remote control application for controlling the vehicle is being executed at the electronic device by communicating with the smart key;
• in response to determining that the remote control application for controlling the vehicle is not being executed at the electronic device by communicating with the smart key, executing the remote control application for controlling the vehicle by communicating with the smart key,
• in response to detecting a user input at the remote control application, remotely controlling the vehicle based on the unique information through the remote control application,
• wherein the first guide message indicates that the hardware key button is usable for controlling the vehicle remotely, and
• wherein the second guide message indicates that the remote control application of the vehicle is usable for controlling the vehicle remotely.

A portable terminal coupled to a smart key, comprising:

• a communication module configured to communicate with the smart key;
• display;
• and
• a processor configured to:
• in response to detecting coupling with a portable terminal case, supply, at the portable terminal, power to the smart key included in the portable terminal case having a hardware key button for controlling a vehicle;
• determine, at the portable terminal, whether a strength of a signal received from the vehicle is equal to a preset reference signal strength or above the preset reference signal strength by communicating with the smart key;
• in response to determining that the strength of the signal received from the vehicle is equal to the preset reference signal strength or above the preset reference signal strength, display, at the portable terminal, a first guide message and a second guide message on a screen of the portable terminal;
• receive, at the portable terminal, unique information for controlling the vehicle from the smart key;
• in response to detecting a user input at the hardware key button, remotely control the vehicle based on the unique information through the hardware key button;
• in response to determining that the user input is not detected at the hardware key button, determine whether a remote control application for controlling the vehicle is being executed at the portable terminal by communicating with the smart key;
• in response to determining that the remote control application for controlling the vehicle is not being executed at the portable terminal by communicating with the smart key, execute the remote control application for controlling the vehicle by communicating with the smart key,
• in response to detecting a user input at the remote control application, remotely control the vehicle based on the unique information through the remote control application,
• wherein the first guide message indicates that the hardware key button is usable for controlling the vehicle remotely, and
• wherein the second guide message indicates that the remote control application of the vehicle is usable for controlling the vehicle remotely.