Datasheet

Analog Pins

There is also a single analog input pin called A. This pin has a ~1.0V maximum voltage, so if you have an analog

voltage you want to read that is higher, it will have to be divided down to 0 - 1.0V range

Other control pins

We have a few other pins for controlling the ESP8266

LDO - this is the enable pin for the regulator. By default it's pulled high, when connected to ground it will turn off

the 3.3V regulator and is an easy way to cut power off to the whole setup. There is a 10K pullup is to whatever

has a higher voltage, V+ or VBat. (See the schematic if you're unclear)

RST - this is the reset pin for the ESP8266, pulled high by default. When pulled down to ground momentarily it

will reset the ESP8266 system. This pin is 5V compliant.

EN (CH_PD) - This is the enable pin for the ESP8266, pulled high by default. When pulled down to ground

momentarily it will reset the ESP8266 system. This pin is 3.3V logic only