I have arduino mega 2560, and ESP8266 Serial WIFI Wireless.
I want to upload data from the arduino to a server. do I need anything else but the ESP8266? (like GSM / ethernet ..?).
and I need to upload this data to a free server, is parse.com good for me? because it has a SDK for arduino YUN only... what about temboo.com ?
and then I want to read this data from an android app. and the same on the opposite way... (from android => to server => to arduino).
where can I start reading about this?