Arc fault protection for a digital electricity distribution system that provides power to a device. The system includes an arc fault circuit interrupter (“AFCI”) and a controller. The controller is connected to the AFCI. The controller is operable to control the AFCI to disable power to the device. The controller includes a processor and a memory. The controller is configured to transmit a digital electricity energy packet through the AFCI to the device, measure an amount of error associated with the digital electricity energy packet, evaluate the amount of error associated with the digital electricity energy packet, determine whether an arc fault condition is present based on the evaluation of the amount of error associated with the digital electricity energy packet, and control the AFCI to disable power to the device when the arc fault condition is determined to be present.

The present disclosure relates to a signal transmission method, system, device, a storage medium and an electronic device. The method includes: determining data to be transmitted by a unit in air conditioning units; and transmitting, by the unit, the data to be transmitted to other units through a designated power line in multiphase power lines, wherein the designated power line is any power line in the multiphase power lines, and the designated power line is a power line shared by all units in the air conditioning units.

The present disclosure relates to a signal transmission method, system, device, a storage medium and an electronic device. The method includes: determining data to be transmitted by a unit in air conditioning units; and transmitting, by the unit, the data to be transmitted to other units through a designated power line in multiphase power lines, wherein the designated power line is any power line in the multiphase power lines, and the designated power line is a power line shared by all units in the air conditioning units.

Controlling electric vehicle (EV) charging operation by controlling capturing, from a pilot line communicatively linking an EV with an EV charging apparatus, at least one signal of a pulse width modulated (PWM) signal or power line communication (PLC) signal indicating EV charging session information associated with charging the EV by the charging apparatus; determining, from session success information from a controller of the charging apparatus, whether to analyze the EV charging session information; and when the session success information is determined to not indicate successful completion of an EV charging session, extracting the EV charging session information from the at least one signal according to Internet protocol layer, and analyzing the extracted EV charging session information to determine a marginal operating condition or a failure condition associated with an EV charging session.

A first physical layer device includes a first transmitter and a first receiver. The first transmitter transmits first data to a second physical layer device over a medium at a first line rate during a first transmit period. The first receiver is configured to not receive data during the first transmit period and an echo reflection period occurring after the first transmit period. The echo reflection period is based on a length of the medium between the first physical layer device and the second physical layer device. The first receiver is configured to, after the echo reflection period, receive second data from the second physical layer device over the medium at a second line rate that is less than the first line rate.

A body-worn hub may detect that a first battery charge level of a first battery in a body-worn device connected to the body-worn hub via a wired connection is at or below a first battery charge level threshold. Accordingly, the body-worn hub may route power from the body-worn hub to the body-worn device via the wired connection to charge the first battery when a second battery charge level of a second battery in the body-worn hub is above a second battery charge level threshold. However, in response to the first battery of the body-worn device being charged to a third battery charge level that is above the first battery charge level threshold or the second battery charge level dropping to the second battery charge level threshold, the body-worn hub may stop routing power to the body-worn device via the wired connection.

A body-worn hub may detect that a first battery charge level of a first battery in a body-worn device connected to the body-worn hub via a wired connection is at or below a first battery charge level threshold. Accordingly, the body-worn hub may route power from the body-worn hub to the body-worn device via the wired connection to charge the first battery when a second battery charge level of a second battery in the body-worn hub is above a second battery charge level threshold. However, in response to the first battery of the body-worn device being charged to a third battery charge level that is above the first battery charge level threshold or the second battery charge level dropping to the second battery charge level threshold, the body-worn hub may stop routing power to the body-worn device via the wired connection.

A grounds maintenance system comprising: a robot tractor comprising; a robot body; a drive system including one or more motorized drive wheels to propel the robot body; a control system coupled to the drive system, the control system configurable to store a mow plan that specifies a set of paths to be traversed for a grounds maintenance operation and control the drive system to autonomously traverse the set of paths to implement the mow plan; a battery system comprising one or more batteries housed in the robot body; and a low-profile mowing deck coupled to the robot body, the mowing deck adapted to tilt and lift relative to the robot body, wherein the control system is configured to control tilting and lifting of the mowing deck and cutting by the mowing deck.

Commissioning a solar power monitoring system includes imaging a plurality of labels, wherein each label of the plurality of labels is associated with an electronic component. Further, commissioning the solar power monitoring system includes discovering each electronic component at the same time based on the imaging of the plurality of labels, displaying a list of the discovered electronic components, and commissioning a solar power monitoring system including the discovered electronic components for use.

A system for controlling operation of a ceiling fan is provided. The ceiling fan includes a fan device and a light device, and can be operated via a user operation module that is to be operated by direct operation, or a wireless receiver module that receives a wireless control signal. Within a predetermined control duration from the time of activation, the ceiling fan can, upon receipt of an operation signal from the user operation module or a wireless control signal from the wireless receiver module, switch to operate in a mode where the ceiling fan is controlled via one of the user operation module and the wireless receiver module that corresponds to the signal received thereby.