Description:
Model:ESP8266-12
ISM 2.4GHzPA +25dBm802.11b/g/n
Warnings:
1.This module requires a 3.3 volt supply for VCC, and 3.3V logic.
2.It is not 5V tolant,Connect RX or TX on 5V for Arduino will destroy this module.
3.You must use a logic level converter, or a 3.3V for Arduino
4.The 3.3V supply on the for Arduino Uno has inadequate current capabilit to power this
module.
5.You must provide a separate,higher 3.3V supply(about 300mA or better)