How to Wire: L, N: AC90-250V power supply AC90-250V to DC5V switching power supply (do not touch this directly with your hands when using AC power supply!!) VCC, GND: DC7-12V power supply; Micro USB: DC5VUSB power supply 6x6mm Button: ESP8266 reset button; UART Program Download Port: ESP8266's GND, RX, TX, 5V are respectively connected to the GND, TX, RX, 5v of the external TTL serial port module, 100 must be connected to GND when downloading, and then disconnect the connection between 100 and GND after the download is complete; GPIO pin header leads to the port; 8 Relay output terminal: Normally closed, the relay is short-connected with COM before the pull-in, and hangs in the air after the pull-in; COM: Public end; NO: Normally open end, the relay is suspended before being closed, and shorted to COM after being closed. Power indicator LED; Programmable LED; Relay indicator LED: lights up when it is closed. Package List: 1 x Relay Module3 x Pins 2 x Sockets Note: 1. DC7-12V, DC5V USB two power supply methods can choose one 2. When using AC power supply, do not directly touch the AC90-250V to DC5V switching power supply with your hands See more

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