How to Make Hand Mobile at your home

All Connection:

        GSM

TX of GSM module -------digital pin 2 of Arduino

RX of GSM module -------digital pin 3 of Arduino

GND of GSM module -------GND of Arduino

SPP pin of GSM module ------ speaker positive

SPN pin of GSM --------- speaker negitive

MCP pin of GSM ------- microphone positive

MCN pin of GSM ------- microphone negitive

     KEYBOARD

pin 1 ---- pin 11 of Arduino

pin 2 ---- pin 10 of Arduino

pin 3 ---- pin 9 of Arduino

pin 4 ---- pin 8 of Arduino

pin 5 ---- pin 7 of Arduino

pin 6 ---- pin 6 of Arduino

pin 7 ---- pin 5 of Arduino

pin 8 ---- pin 4 of Arduino

GSM connection:

Download Programming and Circuit click...... 

Demo Video: