i've new member of this forum, also in arduino environtment and i'm proud can came in!!!
i have a project about data logger system. The system work concept is data from sensor processed in arduino and saved in a SD card. my project is work to save the data in to sd card. but,
i got a problem how to send the data to my phone basically android. i made my android apllication by app inventor.
so, to any one there, could you help me, how to the first step of send data from my arduino to android??
Because, i'm too new know esp8266.
Thans a lot 
no help from me, but I have a dweet that constantl outputs my data and then graphs it. the data is sent via wifi every minute and the dweet site does the storage. their interface displays the data so my phone has no software, just a browser.
it only holds the data while I am connected, all data is lost when I loose the connection.
There are other services that store it for 30 days (free) or longer (fee based)
but what it sounds like to me is that you need a place to store the data and then software to scale that to your graphs, buttons or whatever.
can you do all of that on your device and just connect to your device as a web page ? all graphing and web hosting done on your Arduino ?
my project is monitoring of how much energy needed in a lamp 60 Watt, an then data from current sensor and voltage sensor processed in arduino. There is a SD card to save this data which data saved is energy of each every day.
i have to try make a application android to browsing the data in the SD card via esp8266. but, i until not understand how i with my application to browsing the data periodly.
for example:
in my application, to day is november, 15. i put the date to november,14 to know how much energy needed a lamp, like that.
the communication is between arduino and android via esp8266 directly not go in cloud or internet as same as bluethoot communication,
please, hehe 