Abstract: The invention discloses a system comprising: a first remote controller comprising: at least one emitter of electromagnetic waves; at least one receiver of electromagnetic waves configured, during a training phase, to receive, from a second remote controller associated to an air conditioning (AC) system, electromagnetic waves carrying a plurality of data frames corresponding respectively to a plurality of defined commands of the AC system; at least one processing logic configured to: define, during said training phase, from said plurality of data frames corresponding to said plurality of defined commands of the AC system, a set of possible data frames corresponding respectively to a set of possible commands of the AC system defining a protocol of communication with the AC system; use, during an operating phase, said at least one emitter to send to the AC system, upon an input from a user to send one of the possible commands, electromagnetic waves carrying one of the possible data frames corresponding to said o