ONBOARD DEVICE, INFORMATION GENERATING METHOD, NON-TRANSITORY STORAGE MEDIUM, AND VEHICLE

An onboard device (11; 12; 21; 22) configured to communicate with one or more other onboard devices (11; 12; 21; 22) in an onboard network, and configured to execute processing for updating of software of an own device while communicating with the other onboard devices (11; 12; 21; 22), the onboard device (11; 12; 21; 22) includes an electronic control unit. The electronic control unit is configured to generate, when not performing the processing, information to transmit to the other onboard devices (11; 12; 21; 22) by executing the software, as first information, and generate, when performing the processing, information to transmit to the other onboard devices (11; 12; 21; 22) without executing the software, as second information.