Abstract: A portable point-of-sale terminal is provided, including: a communication module configured to search for a network signal of a wireless network base station for communication; a transaction module configured to perform a transaction procedure; a detection module configured to perform a detection procedure for detecting a signal strength and a network channel of the wireless network base station; a processing module configured to: when the transaction module starts the transaction procedure, drive the detection module to perform the detection procedure; and when it is detected that the signal strength meets a default condition, allow the transaction procedure, and generate a prompt signal to be completed; or when it is detected that the signal strength does not meet the default condition, generate a warning signal; and a display module configured to display prompt information or warning information.

Abstract: A portable point-of-sale terminal is provided, including: a communication module configured to search for a network signal of a wireless network base station for communication; a transaction module configured to perform a transaction procedure; a detection module configured to perform a detection procedure for detecting a signal strength and a network channel of the wireless network base station; a processing module configured to: when the transaction module starts the transaction procedure, drive the detection module to perform the detection procedure; and when it is detected that the signal strength meets a default condition, allow the transaction procedure, and generate a prompt signal to be completed; or when it is detected that the signal strength does not meet the default condition, generate a warning signal; and a display module configured to display prompt information or warning information.

Abstract: A light control device and system and a method of light control are disclosed. The light control system includes an editing device and a light control device. The editing device includes an editing module, a screen, and a wireless communication module. The editing module includes an editing interface including an input block. The screen displays the editing interface. When the input block is activated, the editing module records the time of the activation of the input block in a light control pattern. The wireless communication module receives the light control pattern for transmission. The light control device includes a network module and a control module. The network module receives the light control pattern via wireless communication protocol. The control module generates a set of light control commands in accordance with the light control pattern and outputs the set of light control commands for controlling one or more lighting device.