Tools and techniques are described to automate line testing when wiring devices (such as equipment and sensors) to controllers. Controllers have access to databases of the devices that are controlled by them, including wiring diagrams and protocols, such that the controller can automatically check that each wire responds correctly to stimulus from the controller. After testing, a reporting device rapidly shows the results of the line testing.

Described are systems and methods for power management. A processing system includes one or more cores and a connected power management unit (PMU). The PMU is selected from one of: a first level PMU which can power scale a; a second level PMU which can independently control power from a shared cluster power supply to each core of two or more cores in a cluster; a third level PMU where each core includes a power monitor which can track power performance metrics of an associated core; and a fourth level PMU when a complex includes multiple clusters and each cluster includes a set of the one or more cores, the fourth level PMU including a complex PMU and a cluster PMU for each of the multiple clusters, the complex PMU and cluster PMUs provide two-tier power management. Higher level PMUs include power management functionality of lower level PMUs.

A system includes a plurality of systems-on-a-chip (SoCs), connected by a network. The plurality of SoCs and the network are configured to operate as a single logical computing system. The plurality of SoCs may be configured to exchange local power information indicative of network activity occurring on their respective portions of the network. A given one of the plurality of SoCs may be configured to determine that a local condition for placing the respective portion of the network corresponding to the given SoC into a reduced power mode has been satisfied. The given SoC may be further configured to place the respective portion of the network into the reduced power mode in response to determining that a global condition for the reduced power mode is satisfied. The global condition may be assessed based upon current local power information for remaining ones of the plurality of SoCs.

Passive Ethernet by-pass switches, methods of using the same, and systems including the passive Ethernet by-pass switches include a first connection configured to be coupled to a first Ethernet port, a second connection configured to be coupled to a second Ethernet port, and switching circuitry including at least one internal switch operable to allow network communication between the first connection, the second connection, and at least one Ethernet controller, the at least one internal switch including a depletion mode transistor operable to bridge the first connection to the second connection to establish communication between the first connection and the second connection.

A high-speed transmission system, a signal redriver, and a control method of the signal redriver are provided. The high-speed transmission system includes a transmitting device, a receiving device, and the signal redriver. The signal redriver includes a terminal resistor. A high-speed receiving end and a high-speed transmitting end of the signal redriver are respectively coupled to a high-speed transmitting end of the transmitting device and a high-speed receiving end of the receiving device. The signal redriver is coupled to a control signal transceiving end of the transmitting device and a control signal transceiving end of the receiving device. The signal redriver monitors a control signal transmitted between the transmitting device and the receiving device and determines whether to enter a SLEEP mode based on the control signal. The terminal resistor of the signal redriver in the SLEEP mode is continuously coupled to the high-speed receiving end of the signal redriver.

Example techniques related to battery-powered playback devices. In an example, a first battery-powered playback device receives audio content from a network device and forwards the audio content to a second playback device for synchronous playback of the audio content with the second playback device, plays back the audio content, detects that a battery level of a battery of the first playback device has fallen below a predefined threshold, and ceases the forwarding of the audio content after the battery level of the battery of the first playback device has fallen below the predefined threshold. After the battery level of the first playback device has fallen below the predefined threshold, the second playback device receives the audio content from the network device, forwards the audio content to the first playback device for synchronous playback with the first playback device, and plays back the audio content in synchrony with the first playback device.

A system for remotely measuring the characteristics of water passing through a plumbing control device (PCD) includes a sensor within the interior of the PCD. The sensor is configured to measure characteristics of the water to obtain measured data. The sensor is also linked to a microcontroller of the PCD. An antenna board is linked, and configured to transmit power, to both the microcontroller and the sensor. A mobile device is configured to locate the antenna board. The mobile device transmits power to the antenna board which, in turn, transmits power to the microcontroller and the sensor. When power is not being transmitted from the antenna board, the microcontroller and the sensor are powered off.

A system for remotely measuring the characteristics of water passing through a plumbing control device (PCD) includes a sensor within the interior of the PCD. The sensor is configured to measure characteristics of the water to obtain measured data. The sensor is also linked to a microcontroller of the PCD. An antenna board is linked, and configured to transmit power, to both the microcontroller and the sensor. A mobile device is configured to locate the antenna board. The mobile device transmits power to the antenna board which, in turn, transmits power to the microcontroller and the sensor. When power is not being transmitted from the antenna board, the microcontroller and the sensor are powered off.

An electronic device includes a short-range wireless communication circuit that performs first short-range wireless communication based on a first protocol and second short-range wireless communication based on a second protocol, and a processor that connects the first short-range wireless communication with a peripheral device through the short-range wireless communication circuit, transmits a service discovery frame including service information associated with the peripheral device to devices included in a cluster configured to include the electronic device through the second short-range wireless communication when a trigger event occurs, establishes a wireless data communication path with an external electronic device, which transmits a message in response to the service discovery frame to the electronic device through the second short-range wireless communication, from among the devices included in the cluster, and transmits input information received from the peripheral device through the short-range wireless communication circuit or control information corresponding to the input information to the external electronic device through the wireless data communication path.

In some examples, the disclosure describes a device, comprising: a processor, and a non-transitory memory resource storing machine-readable instructions stored thereon that, when executed, cause the processor to: activate a dynamic power reduction mode for a device in response to identifying the device is in a first power state associated with a first account, and deactivate the dynamic power reduction mode for the device in response to identifying the device is in a second power state associated with a second account.