5. SW1: the output end of channel 1 wall mechanical switch;
6. SW2: Channel 2 wall mechanical switch output;
7. Network configuration / local on / off key: Press and hold for more than 7S until the network indicator flashes quickly to configure the WIFI account and password for the WiFi switch through the APP; short press can be used to control channel 1 on / off
8. GND, RX, TX, 3V3: ESP8285 WiFi module program programming port, which can be used for secondary development firmware flashing (the network configuration key must be kept pressed during the flashing).