Introduction - If you have any usage issues, please Google them yourself
Program features: to achieve a convenient corridor between the lighting control, a lamp, in the upstairs and downstairs have a (Closed) switch. Switch closure does not directly determine the bright lights and the switch state changes is what determines the key lights off. That regardless of how the current state of the two switches, as long as there is an audible switch status changes, will cause the lights lit or extinguished in the switch between the two states. For example, when someone wants to go upstairs, if before the lights are off, and press the downstairs switch (thereafter switch is closed), the lamp lit when upstairs, press upstairs switch, the lamp goes out. And when later someone upstairs, then downstairs switch times (since the switch is open), the lamp will also be highlighted this test, the P1 port is connected with the first one led to simulate lighting, but with s2 and s3 to simulate two switches. Note that because the actual corridor-style switch is closed, while