Addressing of slave devices using interative power activation

A master device for addressing a slave device in a network system comprising the master device and a plurality of slave devices, wherein the slave devices have a common default address in an unaddressed state, the master device comprising:

• a first interface to access a power line for powering the slave devices;
• a second interface for communicating with the slave devices via a communication line;
• wherein each slave device being indexed by an index greater than or equal to 1, the master device being connected to the slave device of index 1
• wherein the master device comprises a processor that implements, for addressing the slave device of index k, k being equal to or greater than 2, the following operations:
• instructing, via the communication line, the slave device of index k−1 to activate the power supply of the slave device of index k via the power line;
• measuring, by the master device, a value of a current consumption on the power line;
• determining, by the master device, a difference between the measured value and a previous value;
• and
• sending, by the master device to the common default address on the communication line, a command to change the common default address of the slave device of index k to a unique address of index k, if the difference between the measured value and the previous value is within a predetermined range.