A system that includes a powerline communication network with a reactive routing protocol and at least one gateway comprising a powerline communication interface and one radio-frequency communication interface. A smart electricity meter also includes a powerline communication interface and at least one radio-frequency communication interface: broadcasts an announcement request message on each of its communication interfaces; after reception of one or more announcement messages, selects a relay agent having the lowest route cost for joining a centralised management device; and making a registration request, using the selected relay agent as a proxy. After registration, the routing of messages coming from or going to said smart electricity meter takes place at the data link layer of the OSI model.

A sensor module assembly includes a sensor housing that houses a sensing element configured to sense a characteristic of a process and generate a sensor signal indicative of the characteristic. The sensor module assembly includes a wireless device housing that houses communication circuitry configured to receive the sensor signal and a wireless transmitter configured to send the sensor signal wirelessly to a remote device. The sensor module assembly also includes a communication cable that communicatively couples the sensing element in the sensor housing to the communication circuitry in the wireless device housing.

This wireless sensor system includes: one or a plurality of wireless terminal devices each configured to transmit data including sensor information indicating a result of measurement by a sensor; a management device; and a plurality of relay devices configured to relay the data received from the wireless terminal devices, to the management device or another relay device. Each of the relay devices transmits, to the management device, communication state information from one or a plurality of the wireless terminal devices to the relay device. On the basis of the communication state information received from each relay device, the management device transmits, to a relay device as a target, relay permissibility information that enables discernment, for each target terminal which is one or a plurality of the wireless terminal devices, as to whether or not relay by the relay device of the data from the target terminal is permitted.

A photovoltaic module remote-access module switch and real-time temperature monitoring system is provided. In one embodiment, a remote-access module switch and monitoring circuit capable of communicating with a remote receiver and having a pair of output electrical leads, and a pair of input electrical leads connected to a pair of electrical power leads of a solar photovoltaic module is provided, and which further includes a series switch, a module voltage measurement circuit, a module current measurement circuit, a temperature sensor, and a communication circuit.

A method corrects at least one transmission parameter for data transmission between a sensor unit and a control unit. A sensor timing signal is generated by a sensor oscillator with a predetermined period. The at least one transmission parameter is determined on the basis of the sensor timing signal. A reference timing signal is generated by a reference oscillator with a predefined reference period. The sensor timing signal is compared with the reference timing signal. A deviation of a current period of the sensor timing signal from a reference period is determined on the basis of the comparison. The at least one transmission parameter is corrected on the basis of the determined deviation.

Embodiments of the present disclosure relate to a data transmission method and associated devices. In the method, data collected by at least one monitoring device in a substation is received at a gateway. Further, a status of a connection between the gateway and a first network is detected, where the first network enables communication between the gateway and a server. Further, in response to detecting a disconnection between the gateway and the first network, the data is sent to a user device via a second network hosted by the gateway to enable the user device to forward the data to the server.

A method and system are described for communicating within a system, which may be along tubular members. The method includes constructing a communication network for tubular member, such as a wellbore accessing a subsurface region or a pipeline, and using the communication network in hydrocarbon operations, such as hydrocarbon exploration, hydrocarbon development, and/or hydrocarbon production.

Aspects of the present disclosure are directed toward a system and apparatuses for calibrating metering circuitry. An example system includes a first adapter including a plurality of receptacles proximally arranged in a circular manner on a first surface of the first adapter, the plurality of receptacles configured and arranged to be connected to endpoint controlling circuitry configured and arranged to communicate over the power lines or by using a RF communication, characteristics related to power usage of an endpoint device in a PLC network. The system further includes a second adapter including a plurality of electrical contacts disposed on a first surface of the second adapter and a plurality of terminals disposed on a second surface of the second adapter opposite of the first surface. The plurality of terminals can be physically arranged so as to plug into corresponding inputs on meter calibration circuitry. Further, the system includes a housing fixedly securing the first adapter and the second adapter and enclosing circuitry configured, while in operation, to facilitate calibration of the endpoint controlling circuitry by the meter calibration circuitry.

An offshore measured or logging-while drilling electromagnetic telemetry system includes a bottomhole assembly having a transmitter to communicate one or more electromagnetic telemetry signals. A subsea telemetry cable is positioned on a sea floor to receive the telemetry signals. The subsea telemetry cable is coupled to an umbilical cable extending to a surface communication unit positioned at the sea surface. Signals received by the subsea telemetry cable are transmitted to the surface communication unit for further processing.

A slave control apparatus including a receiver and a controller. The receiver is configured to receive a sensed physical quantity of a battery and a sensed output physical quantity of a converter corresponding to the battery. The controller is configured to determine state information of the battery based on the sensed physical quantity and the sensed output physical quantity, transmit the state information to a master control apparatus, and control the converter based on output information from the master control apparatus that corresponds to the state information.