Optimisation of wireless communications of a tyre-pressure-monitoring system for a motor vehicle

A method for adjusting the reaction time of wireless communications between a tire pressure monitoring system of a motor vehicle and a smart device of a user of said motor vehicle, said tire pressure monitoring system comprising a plurality of units including a central unit and a plurality of wheel units, said communications taking place between said units of said tire pressure monitoring system and said smart device by means of ultra high frequency signals in which, in a given period, phases permitting the activation of two-way communications alternate with standby phases, said method comprising:

• when the smart device is located in a first area of the environment of the vehicle and approaches the vehicle, the central unit sets the period of wireless communications between the units of the tire pressure monitoring system and with the smart device to a first given value;
• when the smart device is located in a second area of the environment of the vehicle, nearer to the vehicle than the first area, the central unit establishes a connection using two-way wireless communications between said central unit and the smart device, and:
• if the smart device is moving in the second area, the central unit sets the period of wireless communications between the wheel units of the tire pressure monitoring system and the smart device to a second given value, lower than the first given value;
• or
• if the smart device is stationary in the second area for a period that exceeds a specified threshold, the central unit causes the wheel units of the tire pressure monitoring system to switch to a standby phase only.