Once all these devices are prepared and you know the basic working principles of the WiFi lighting control system, you should connect all these devices properly according to the user manuals. Generally the output ends of the receiver shall be connected to the lights, and if it is DC version, you need a power supply.
The WiFi to RF converter shall be connected with your router by a RJ45 cable, and a power supply is required for it depending on its input. The mobile device with APP installed works a sender, while you download the APP, you should join it to your home network and pair the APP with the receiver.
A good APP has easy and simple control interface and detailed operation instructions.

The WiFi dimmer switch enables full touch control and smooth dimming and switching functions. It is portable in your pocket and enables wireless remote control. It is smart control that enables you to control multiple zones (areas) separately or synchronously, for instance, sitting room, bedroom, bathroom, kitchen and so on, you can control them anywhere within your house.
Thanks to the great PWM control of the receiver, the brightness can be adjustable smoothly without any flickering and switching on/off can be gradually instead of suddenly switching on/off that may hurt your eyes. One mobile device can control multiple receivers and each receiver maximally can be controlled by 8 remotes.
Many other features like memory function that stored your preferred brightness, and operation return function are available.