The present disclosure provides a control method and a control apparatus for a communication device, a communication system, and a storage medium. The control method for a communication device includes periodically outputting, a first level signal and a second level signal to the communication bus, and the second communication device establishes a data connection with the first communication device based on that the level signal on the communication bus is the first level signal, and the second communication device establishes a power supply connection with the first communication device based on that the level signal on the communication bus is the second level signal. Since the data connection and the power supply connection do not appear at the same time, the communication bus using the above-mentioned control method does not need to set an inductance compared to the traditional Home Bus.

A system comprises a primary unit and a plurality of secondary units each having a unique unit number. The primary unit is configured to communicate a command to each secondary unit with instructions to reply during a time window. The primary unit is also configured to receive a reply communication indicating the secondary unit's unique unit number from at least one of the secondary units, and determine an address to assign to the replying secondary unit based at least in part on the received unique unit number.

A system comprises a primary unit and a plurality of secondary units each having a unique unit number. The primary unit is configured to communicate a command to each secondary unit with instructions to reply during a time window. The primary unit is also configured to receive a reply communication indicating the secondary unit's unique unit number from at least one of the secondary units, and determine an address to assign to the replying secondary unit based at least in part on the received unique unit number.

A system for modulating hot gas reheat operation of a heating, ventilation, and/or air conditioning (HVAC) system with multiple compressors, wherein the HVAC system is configured to regulate air provided to multiple zones. The system includes a controller configured to respond to a call for dehumidification in the absence of a call for cooling by sequentially energizing a first compressor of the multiple compressors in a reheat mode of the first compressor, energizing a second compressor of the multiple compressors in a cooling mode of the second compressor, energizing a third compressor of the multiple compressors in a reheat mode of the third compressor initially at full capacity, and energizing a fourth compressor of the multiple compressors in a cooling mode of the fourth compressor.

A system for modulating hot gas reheat operation of a heating, ventilation, and/or air conditioning (HVAC) system with multiple compressors, wherein the HVAC system is configured to regulate air provided to multiple zones. The system includes a controller configured to respond to a call for dehumidification in the absence of a call for cooling by sequentially energizing a first compressor of the multiple compressors in a reheat mode of the first compressor, energizing a second compressor of the multiple compressors in a cooling mode of the second compressor, energizing a third compressor of the multiple compressors in a reheat mode of the third compressor initially at full capacity, and energizing a fourth compressor of the multiple compressors in a cooling mode of the fourth compressor.

A recognition process for an air conditioner is executed while the deterioration of the environment due to stoppage of the air conditioner is suppressed. In an air-conditioning system in which a plurality of air conditioners belonging to an identical refrigerant system are connected through a communication line inside the identical system and a plurality of air conditioners belonging to different refrigerant systems are connected through a communication line outside the different systems, for the plurality of air conditioners belonging to the identical refrigerant system, a recognition process is executable while an air-conditioning control process is executed by transmission through at least the communication line inside the system.

Provided are embodiments for a heating, ventilation, and air conditioning (HVAC) system for providing sensor information and sensor communication over relay-controlled power line. The system can include a controller of the HVAC system and a first power line converter coupled to the controller. The first power line converter is configured to receive data over a serial bus, convert the data into a communication message for transmission onto a power line, wherein the power line is configured to transmit power and communication messages, and transmit the communication message over the power line. Also provided are embodiments for transmitting and receiving a communication message over relay-controlled power line.

Provided are embodiments for a heating, ventilation, and air conditioning (HVAC) system for providing sensor information and sensor communication over relay-controlled power line. The system can include a controller of the HVAC system and a first power line converter coupled to the controller. The first power line converter is configured to receive data over a serial bus, convert the data into a communication message for transmission onto a power line, wherein the power line is configured to transmit power and communication messages, and transmit the communication message over the power line. Also provided are embodiments for transmitting and receiving a communication message over relay-controlled power line.

A control apparatus is communicably connected to a first apparatus to perform a control on the first apparatus. The control apparatus includes a data collecting unit, a collection interval determining unit, and a storing unit. The data collecting unit collects, by polling and from the first apparatus, data in order to perform the control. The collection interval determining unit determines, based on a setting content of the control, a collection interval of the data collected by the data collecting unit. The control apparatus performs a plurality of the controls on one first apparatus. The storing unit stores, for each of the controls, one data item or a plurality of data items constituting the data. The storing unit further stores, for each of the data items, the collection interval.

A method for monitoring and controlling an environment of an internal space including: providing conditioned air to the internal space using a heating, ventilation, and air conditioning (HVAC) system; detecting one or more environmental parameters within the internal space using at least one sensor; receiving a report request from an individual through a computer application of a computing device, the report request includes a focus area selection that selects one or more focus areas, wherein the one or more focus areas include at least one of an indoor air quality, a thermal comfort, or an airborne transmission; generating a performance report for the focus area based on at least the environmental parameters and specifications of the HVAC system, the performance report evaluating at least a performance of the HVAC system; and displaying the performance report on the computing device.