Description ESP 8266 Wifi Module This ESP 8266 Wifi Module small board can act as WiFi module for Arduino. Standalone microcontroller. With RISC processor running at 80 MHz and with 1 MB Flash You can do lot interesting projects. It has 9 GPIO pins to interact with other modules (One Wire, I2C, SPI). ESP 8266 technical details 9 GPIO pins, all PWM compatible RISC CPU 80MHz analog input (ADC) measuring voltages from 0V to 1V max power supply 3.3V logic 3.3V ceramic antenna and U.FL connector for external antenna 1MB Flash To program ESP You will need FTDI friend or USB/Serial converter. FTDI cable 3 V will work only if You provide other power source, FTDI cable, even 3V version has 5V at it’s power line. W also carry adapter, which has all ESP GPIO in 2.54 raster – ou can plug this adapter directly into breadboard or connect standard F-M cables. Power supply During start and in some working modes ESP takes up to 220 mA of current. Not all USB/Serial converters will provide such current. In that case You will need some separate 3.3V source to power module. More on ESP8266 current consumption topic. TL;DR: module takes from 220 mA in 802.11b mode, through 130mA – 150 mA in n or g modes to single mA in power save modes.
