Adafruit HUZZAH ESP8266 breakout

• Buy from AdaFruit (https://www.adafruit.com/products/2471)
• Don't forget cable (https://www.adafruit.com/product/954)
• Follow instructions for "Installing with Boards Manager" to add support to the Arduino Environment for the ESP8266 chip (https://github.com/esp8266/Arduino)
• Overview doc (https://learn.adafruit.com/adafruit-huzzah-esp8266-breakout/overview)
• Connect USB Console cable to board (https://learn.adafruit.com/adafruit-huzzah-esp8266-breakout/using-arduino-ide)
• Remember, before every download you have to:
  • Hold down the GPIO0 button, the red LED will be lit
  • While holding down GPIO0, click the RESET button
  • Release RESET, then release GPIO0
  • When you release the RESET button, the red LED will be lit dimly, this means its ready to bootload
  • You get the warning: espcomm_syn failed message if you forget to do this
  • Wait until the dots stop on the bottom console window to open the serial console
  • (from https://learn.adafruit.com/adafruit-huzzah-esp8266-breakout/using-arduino-ide)
• Copy the Blink Test code from https://learn.adafruit.com/adafruit-huzzah-esp8266-breakout/using-arduino-ide to test. Red light should blink.
• Copy the Connecting via WiFi code from https://learn.adafruit.com/adafruit-huzzah-esp8266-breakout/using-arduino-ide.
  • Change ssid to "wustl-guest-2.0"
  • Change password to ""
  • Upload program.
  • Open the serial monitor to see IP and messages from adafruit web server. Make sure the serial data rate is set to 115200 baud.
• Get Mac Address of ESP8266
  • Add this code to the setup function of the WiFi code

 uint8_t macArray[6];
 WiFi.macAddress(macArray) ;
 for (int i=0;i<sizeof(macArray) ; i++) {
   Serial.print(macArray[i],HEX) ;
   if (i != sizeof(macArray)-1) {
     Serial.print(":") ;
   } else {
     Serial.println("");
   }
 }

• UDP Packets
  • SSID: wustl-guest-2.0
    • You can use wustl-guest-2.0 for web traffic but all of the other ports are block by the university firewall. However, we have our own wireless network in Bryan 316 for your use.
  • SSID: Bryan316
    • Your ESP8266 module can use the SSID: Bryan316 but you have to send your MAC Address to Ed Richter (ed@ese.wustl.edu) so he can add your device to he access list.
  • UDP Communication
    • Download File:UDPExample.zip
    • The .zip file includes example code to transmit and receive UDP packets to the ESP8266.
      • UDP2ESP8266.vi is a LabVIEW program that can run on your computer. It transmits a random number to the IP of your ESP8266 on port 9999 and receives packets from the same IP on port 1000.
      • UDPExample.ino is a slightly modified version of a UDP Example on the ESP8266 forum. This program receives a UDP Packet on port 9999 and retransmits it to the same IP on port 1000.