ESP8266 The $5 Internet Wonder Ralph Iden
INTRODUCTION • Internet of Things (IoT) is gaining traction • More and more commercial products available • Most offerings are centralized solutions • Security still a concern • Two years ago, the Imp looked promising • Still alive with more modules, Wink, GE, and Murata embracing • Requires available centralized server to boot up and operate • Cost ~29 dollars plus a carrier board (~$10-$14) • Limited extensibility and controlled by Electric Imp
ENTER ESPRESSIF • ESP-8266 system on a chip (SoC) • Big time game changer • Affordable, hackable, and best technology/price ratio available • 32 bit microcontroller, ~36K of RAM, 1 Mbyte or more Flash, GPIO, UART • WiFi 2.4GHz 802 b/g/n FCC certified (most modules) radio • WPA/WPA2 with WEP/TKIP/AES encryption • Integrated TCP/IP stack (IPv4, TCP/UDP/HTTP/FTP) • Low power standby (deep sleep < 10uA) • Wakeup and transmit packets in less than 2ms
ESP-8266 FAMILY $5 $2 USD
MORE BOARDS $15 USD $5 USD
ADAFRUIT’S HUZZAH $10 USD
FTDI USB TO SERIAL SOLUTIONS FTDI Friend Adafruit/FTDI cable $15 USD $15-20 USD
PROGRAMMING OPTIONS • Not restricted to a single programming platform • AT command set (just like the old Hayes modems) • Lua – Adafruit’s Huzzah comes with Lua flashed into memory • Arduino IDE!
OUT OF THE BOX FUNCTIONALITY • Serial I/O • WiFi station, access point, or both • WiFi scanner • HTTP/HTTPS client • HTTP Server • NTP time services
Let’s see the ESP8266 in action…
LINKS • Expressif : http://espressif.com/en/products/esp8266/ • ESP-8266 datasheet: https://www.adafruit.com/images/product- files/2471/0A-ESP8266__Datasheet__EN_v4.3.pdf • Everything ESP8266: http://esp8266.com • Setting up the Arduino IDE: https://learn.adafruit.com/adafruit-huzzah- esp8266-breakout/using-arduino-ide • Huzzah ($9.95): https://www.adafruit.com/products/2471 • FTDI Friend ($14.75): https://www.adafruit.com/products/284 • FTDI cable ($17.95): https://www.adafruit.com/products/70
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