ESP 8266 Wifi Module
This ESP 8266 Wifi Module small board can act as WiFi module for Arduino.
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.