Gas Leakage Detector using Arduino and GSM Module with SMS Alert

Gas Leakage Detector using Arduino and GSM Module with SMS Alert and Sound Alarm

in this project i will show you how to make a Gas Leakage Detector using Arduino and GSM Module .in this project we use
1) arduino uno
2) GSM module SIM 800
3) 16*2 lcd display
4) I2C lcd display module
5) 12 Volt DC power supply
6) a SIM card
7)  GAS sensor -MQ9
8) connecting wire

all the Connection of this project given below

LCD display to i2c display : simply  connect LcD dispaly to i2c display module with parallel

i2c to arduino :        i2c         to           arduino  pin
                                   +           to            +
                                  -            to              -
                                 SCA      TO           A4
                                 SDA       TO          A5

Arduino to Gas sensor :     Gas sensor  to       Arduino pin  
                                              +                    to       +
                                             -                     to       -
                                             A0                 to        A0

GSM to Arduino connection:        GSM to arduino
                                                         RX     to   D9
                                                         TX      to  D10
                                                    Ground   to Ground pin  (must be )


code: https://drive.google.com/file/d/10S8A...

i2c Library : https://drive.google.com/open?id=1wWm...

how to use i2c and display?
How to connect i2C (16x2) lcd display...

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