Abstract: A method for autoconfiguration of a plurality of nodes in a linear network allows extracting the address and position of each node. The method includes applying an identifier field for transmitting to the bus the bit sequence of the identifier of a chosen node. Then for at least for the first node to the last but one node, a field comprising a predetermined bit sequence is applied. The field comprises dominant bits, so a current is transmitted. Then, a further field is applied for transmitting any stored direction bit associated to that node and obtained in any previous iteration. The iteration continues by choosing a node different from a node chosen in any previous cycle, starting the communication, until all nodes are identified.

Abstract: A method for autoconfiguration of a plurality of nodes in a linear network allows extracting the address and position of each node. The nodes are identified by a unique identifier. The method comprises choosing a node in a network and extracting its identifier, and for the first node to the last but one node, transmitting a current in the network from the chosen node, and reading the direction of the current flowing through at least the nodes not chosen in previous iteration cycles. The identifier is linked with the direction of the current for said not chosen nodes, obtaining the position of said not chosen nodes relative to the chosen node. These steps are repeated by choosing a different node not chosen before. Autoconfiguration is finished when the identifier of each node is extracted, and the physical position of each node is determined.

Abstract: A lighting system includes a plurality of nodes arranged in a serial network. The lighting system has a master node, one or more gateway nodes, a first communication bus connecting the one or more gateway nodes to the master node, a plurality of slave nodes such that each slave node is connected to a lighting source and is arranged for conveying data messages, and one or more second communication buses, each connecting one of the gateway nodes with one or more slave nodes of the plurality. The master node is arranged for conveying a unique network address to the one or more gateway nodes via the first communication bus, and the one or more gateway nodes are arranged for conveying a unique network address to the plurality of slave nodes via one of the second communication buses. At least one gateway node is arranged for storing a lighting plan for lighting one or more slave nodes connected to that gateway node.

Abstract: A device having a light emitting diode (LED) of a red-green-blue type, a pulse width modulation (PWM) control, a current supply, and a microcontroller. The RGB LED device arranged for setting a PWM duty cycle using the PWM control and for supplying to the LED either a current of a first value or a current of a second value higher than the first value from the current supply. A method for calibrating the LED of the RGB LED device by measuring sets of tristimulus values when the PWM duty cycle and currents are applied, and calculating from the measured tristimulus values parameters to express colour intensity as a function of PWM duty cycle under the applied current. A method for operating the RGB LED device where calibration parameters linked to the use of a current having a low value and calibration parameters linked to the use of a high current value are determined and used to account for a possible working point shift when switching between the two currents.

Abstract: A method of operating a plurality of driving units for powering electronic units comprises interchanging a data frame including a bit sequence, between a master control unit and at least one of a plurality of driving units at slave nodes. A step of applying an ID field comprises indicating the driving unit address using a first bit sub-string comprising N bits, allowing the master control unit to identify whether data should be received or transmitted, or allowing each addressed driving unit to decode which action is required by the master control unit, using an R/T command bit, performing a length decoding step, for including information in the ID field regarding the type of instructions included in the data frame, using an F function bit, and assigning data bits to different electronic units or indicating in the length of the bit string in the data field, using a second bit sub-string.

Abstract: A method of operating a plurality of driving units for powering electronic units comprises interchanging a data frame including a bit sequence, between a master control unit and at least one of a plurality of driving units at slave nodes. A step of applying an ID field comprises indicating the driving unit address using a first bit sub-string comprising N bits, allowing the master control unit to identify whether data should be received or transmitted, or allowing each addressed driving unit to decode which action is required by the master control unit, using an R/T command bit, performing a length decoding step, for including information in the ID field regarding the type of instructions included in the data frame, using an F function bit, and assigning data bits to different electronic units or indicating in the length of the bit string in the data field, using a second bit sub-string.

Abstract: A method for calibrating a light emitting diode (LED) of a red-green-blue type is arranged for setting a pulse width modulation duty cycle and for supplying to the LED either a current having a first value or a current having a second value higher than the first value.