Instructions

IDUINO for maker’s life
www.openplatform.cc
SD_SS
SD card Slave select
SD_DI
SD card Serial data In
SD_DO
SD card Serial data Out
SD_SCK
SD card Serial clock
Example
The Library contains different examples. Please download the library from:
https://github.com/adafruit/Adafruit-GFX-Library/archive/master.zip
Reference
https://learn.adafruit.com/arduin-o-phone-arduino-powered-diy-cellphone