Use with microcontrollers to easily create wireless connections over wifi networks. IOT applications
ESP8266 can be used as an external Wifi module, using the standard AT Command set Firmware by connecting it to any microcontroller using the serial UART, or directly serve as a Wifi-enabled micro controller, by programming a new firmware using the provided SDK.
The GPIO pins allow Analog and Digital IO, plus PWM, SPI, I2C, etc.
Some example projects:
ESP8266 VCC and CH_PHD are connected to 3.3V power supply.