5V/8 80V power supply ESP8266WIFI dual relay module ESP 12F development board secondary development

5V/8-80V power supply ESP8266WIFI dual relay module ESP-12F development board secondary development

Burn mouth:
GND,RXTX5V of ESP8266 are respectively connected to GNDTXRX,5V of external TTL serial port module.100 needs to be connected to GND when downloading. After downloadingdisconnect the connection between100 and GND;

Relay output:
NC: normally closed endthe relayis short-circuited with COM before closingand suspended after closing; COM: public terminal;
NO: normally open,the relay is suspended before being pulled in,and is short-circuited with COM after being pulled in.

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