MEGA + RFID + TFT + RTC + SDCARD

Using Arduino Project Guidance
#1

hello

I need to know if the material list below is all compatible .. what do you think? :wink:

Arduino Mega R3 http://arduino.cc/en/Main/arduinoBoardMega2560

Wifi Shield Seedstudio http://www.exp-tech.de/Shields/Seeedstudio-Wifi-Shield.html (this shield have 2 Grove connectors)

Grove 125KHz-RFID http://www.exp-tech.de/Shields/Seeedstudio-Grove---125KHz-RFID-Reader.html

Grove Real-Time-Clock http://www.exp-tech.de/Shields/Seeedstudio-Grove-Real-Time-Clock-Module-RTC.html

AND

ITDB02-2.8 TFT LCD http://www.exp-tech.de/Displays/ITDB02-2-8-TFT-LCD.html
SD CARD (included on display)

Thanks, JP

#2

this is my idea but,I2C is only for arduino UNO or work with arduino MEGA ?

SD card works with ICSP ?

I saw the datasheet and concludes that the SDA SCL pins are in 43/44 and 20/21, will have to connect these pins?

#3