Attachment usage system

An attachment usage system comprising:

• a working vehicle including a hitch to attach and detach thereto and therefrom an attachment to perform work;
• and
• a portable device;
• wherein
• the attachment is operable to have therein or thereon a transmitter to periodically transmit a first wireless signal which includes a piece of first attachment information relating to the attachment and which is compliant with a near field communication standard;
• the portable device includes a short-distance communication interface and is operable to transmit, via the short-distance communication interface, a second wireless signal which includes a piece of second attachment information relating to the attachment to be attached to the hitch and which is compliant with the near field communication standard;
• the working vehicle includes:
• a receiver to receive the first wireless signal and the second wireless signal;
• and
• a vehicle controller including a processor and a memory to store, for a period of time, one or more of the pieces of first attachment information included in one or more of the first wireless signals received by the receiver and one or more of the pieces of second attachment information included in one or more of the second wireless signals received by the receiver;
• and
• the vehicle controller is configured or programmed to:
• perform a selecting process to select, according to a predetermined condition, a piece of attachment information which is the piece of first attachment information or the piece of second attachment information included in one of one or more of the first and/or second wireless signals received by the receiver, and perform a predetermined process based on the piece of attachment information selected in the selecting process;
• and
• perform the selecting process to select, according to the predetermined condition, one of the one or more pieces of first and/or second attachment information stored in the memory;
• the transmitter includes a vibration sensor and is operable to, if the vibration sensor detects vibration before the transmitter transmits the first wireless signal, transmit the first wireless signal which includes a piece of first vibration information indicating that there is vibration;
• the portable device includes an input interface and a portable device controller including a processor and a memory;
• the portable device controller is configured or programmed to, if information indicating the attachment to be attached to the hitch is received via the input interface, cause the short-distance communication interface to transmit the second wireless signal including a piece of second vibration information indicating that there is vibration;
• and
• the vehicle controller is configured or programmed to:
• when the first wireless signal is received by the receiver, if the first wireless signal includes the piece of first vibration information, cause the memory to store the piece of first attachment information included in the first wireless signal;
• and
• when the second wireless signal is received by the receiver, if the second wireless signal includes the piece of second vibration information, cause the memory to store the piece of second attachment information included in the second wireless signal.