I got my hands on an Amazon Dash button, a very neat little Internet of Things (IoT) button which automatically orders you your favorite goodies on the click of a button.
Link to my blog post on the audio transmission protocol: http://www.blog.jay-greco.com/wp/?p=116
Datasheets:
ADMP441: http://www.analog.com/media/en/techni...
STM32: http://www.st.com/web/en/resource/tec...
WiFi Module: https://www.broadcom.com/products/wir...
SPI Flash: http://ww1.microchip.com/downloads/en...