The device obtains information in different ways in the two modes, read below section for details. 4.3 The Wi-Fi module basic workflow Place the module’s power supply (VCC) pin capacitance and other module pin capacitances, resistors as close as possible to the module pins, and the tracepath should be short. The upper and lower layers of the PCB where the module is placed should not be routed as much as possible. Do the copper-clad processing, and the PCB from the module antenna to the nearest pin of the module should be hollowed out as much as possible. The module PCB antenna area and the 15 mm extension area need to be clear (copper, trace on the board, and component placement are strictly prohibited), refer to the following figure:

The timer function is configured through the APP, and the timer is divided into the following four types:The flashing mode of the Wi-Fi status light on the device represents the its current network working status. The specific status includes the following seven types: The switch for the second channel, active low. APP configuration pin, when the low level> 5S, enter the pairing mode. PSF-B04 supports timer. The eWeLink APP provides four timing modes to facilitate the use in more scenarios. PSF-B04 module can be used as a 4-channel switch, which can control the switch locally or remotely through APP.

This is the Forum CUL-40039 Culina Konect Wireless On/Off Kinetic Switch Non-Dimmable Wi-Fi Module - a wifi and RF wireless receiver.

The switch for the fourth channel pin, active low. APP configuration pin, when the low level> 5S, enter the pairing mode.

The relay switch for the first channel: active high, power-on default low level. Note: As a switch button, there will be a period of high level at the moment of power-on, which requires a pull-down (1~4.7K) resistor to ground.Count downtimer: The count down is to facilitate the user to perform one-time timing operations, such as turn on/off the device after 30 minutes. It is very convenient to turn off a device after running a period of time. This device supports up to 24 hours of count down.