METHOD OF SELECTING A PROTOCOL

摘要

The invention is a method for selecting a protocol, a first contactless device being able to communicate through first and second contactless protocols by generating a modulated magnetic field set to a first power level, respectively to a second power level. The modulated magnetic field generation is started immediately at the beginning of the polling sequence. The first power level is lower than 1,5 A/m. The method comprises the steps of : - starting a polling sequence by using the first protocol. The polling sequence comprises at least one wake-up command. - checking if a response has been received from a second contactless device for a wake-up command during a preset period. switching to the second protocol in case of unsuccessful polling sequence.