Bluetooth mobile phone accessory for Missed calls and SMS

Step 2: How to assemble?

Below are the steps for connecting the hardware pieces
1. Connect the Bluetooth module to Arduino serial port:
Module Pin       Arduino Pin
Vcc                  3,3V
GND                GND
Tx-o                 Rx (if Mega, connect to 18, if other Arduino, connect to Digital 0)
Rx-I                  Tx (if Mega, connect to 17, if other Arduino, connect to Digital 1)

2. Connect the display module to Arduino (you can reassign pins in the code if you like)
Module Pin      Arduin Pin
GND                GND
+5V                 5V
DIN                  Digital 4
CS                   Digital 5
CLK                 Digital 6