LC Technology AC/DC 1 Channel ESP-12F Dev Board Relay
This dev board can be powered by AC 90V-250V，DC 7-12V or DC 5V via microUSB. Choose only one of the three!
Led2i is connected to GPIO15. You can unassign it or control it using “LedPower2” command.
WARNING: DO NOT IN ANY CIRCUMSTANCE OPERATE THE DEVICE WHILE CONNECTED TO AC POWER
Flash using any of the provided TX/RX headers and GND. Do not connect VCC from the USB-to-serial adapter but power the module using micro USB.