Abstract: A constant temperature system is provided, including: a HVAC system; a first thermostat configured to control the HVAC system; a second thermostat for replacing the first thermostat; an application in a terminal device for guiding installation of the second thermostat. The terminal device includes a display screen. The application is configured to: obtain a first wiring connection mode, determine a system configuration of the HVAC system, determine a type of an energy source for driving the HVAC system to operate, obtain a second wiring connection mode according to the first wiring connection mode, instruct a user to replace the thermostat according to the second wiring connection mode; obtain control logic matching the system configuration and the type of the energy source to enable the second thermostat to control the HVAC system when the second thermostat and the HVAC system are connected in the second wiring connection mode.

Abstract: An operating method of an underwater robot based on ultrasonic radar, an underwater robot and a non-volatile storage medium is described. The method comprises: controlling the underwater robot to travel in a first direction from any first position at a bottom of a pool to a second position close to a wall of the pool based on an electrical signal from the ultrasonic radar; controlling the underwater robot to travel from the second position along the wall to a third position to generate an along-wall path; comparing the along-wall path with a pool bottom model, and determining the position information of the third position in the pool bottom model; and controlling the underwater robot to travel along a spiral path starting from the third position to traverse the whole bottom based on the position information.

Abstract: A method and an apparatus for cleaning a pool are provided, being applied to a client application installed in a terminal device. The method includes: modeling the pool according to information of the pool collected by the terminal device to determine a three-dimensional model of the pool; receiving a cleaning result on the pool sent by an unmanned cleaning device coupled with the terminal device, and displaying the cleaning result in the client application, wherein a cleaning route of the unmanned cleaning device is determined by the terminal device according to the three-dimensional model; and receiving feedback on the cleaning result, and adjusting a path planning of the unmanned cleaning device based on the feedback.