3pcs ESP-12F AC/DC Power Supply ESP8266 AC90-250V/DC7-12V/USB5V WIFI Single Relay Module Development Board

Feature 1 On board mature and stable 12F WIFI module large capacity 4M Byte Flash2 The I O port and UART program download port of the WiFi module are all exported which is convenient for secondary development 3 On board AC DC switching power supply module power supply mode supports AC90 250V DC7 12V USB5V4 On board WIFI module RST reset button5 12F supports the use of development tools such as Eclipse for Arduino IDE and provides reference programs under the for Arduino development environment 6 One 5V relay on board output switching signal suitable for controlling load with working voltage within AC250V DC30V7 Onboard power indicator 1 programmable LED and relay indicatorFunction 1 L N AC90 250V power supply2 AC90 250V to DC5V switching power supply Do not touch here directly with your hand when using AC power supply 3 VCC GND DC7 12V power supply 4 USB DC5V USB power supply Note AC90 250V DC7 12V DC5VUSB can be selected as one of the three power supply methods 5 6X6mm button 8266 reset button 6 UART program download port GND RX TX 5V of 8266 are connected to GND TX RX 5V of the external TTL serial module rectively IO0 must be connected to GND when downloading and then disconnected connection 7 GPIO pin out port 8 Relay output Normally closed end the relay is short circuited to COM before pull in and suspended after pull in COM public end NO Normally open the relay is suspended before the pull in and shorted to C