Some sample ESP8266 Open SDK based apps for Metaswitch's 2016 Engineering Conference.

Build
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Make sure esp-open-sdk/xtensa-lx106-elf/bin is in path - run . ./fix_path.sh to do this assuming esp-open-sdk is in ~

Run make in app's directory.  Set up SDK_BASE beforehand.

Run make flash

Run make connect

Contents
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- boiler
  - Some boilerplate code for an ESP8266 SDK app.  Doesn't do anything else.

- blink
  - Standard LED blink app

- exception
  - Accesses a NULL pointer to show an exception being thrown

- wifi_led
  - Shows off use of WiFi APIs, plus flashes and LED wifi connecting or hitting
    errors