It’s my blog in which we are going to use a gas alarm. In this system when pollution is detect user got a message.
Step 1: Materials Required
(2) GSM shield.
(3) Jumper Cables
(4) 10K Resistor
(5) Breadboard
(6) MQ 135 gas sensor
Step 2: How to make connection between GSM shield and Arduino:-
Firstly
we have to connect the transmitter part of GSM module to the pin 2 of arduino
and receiver part and make both part ground.and don’t forget to give the power
to the GSM shield with a 12V when our device is active.
Step 3: Making Connections between sensor and Arduino:-
Make connections and Treat the Side of
Sensor With"Mq135" Written As To and choose analog pin A0.
Step 4: The Time of test:-
Firstly we will run code attached so
that we can see readings of sensor in normal and polluted environment on serial
monitor.
int mqx_analogPin = A0; // connected to the output pin of MQ-X
int mqx_analogPin = A0; // connected to the output pin of MQ-X
void setup(){
Serial.begin(9600);
// open serial at 9600 bps
}
void loop()
{
// give ample warmup
time for readings to stabilize
int mqx_value =
analogRead(mqx_analogPin);
Serial.println(mqx_value);
delay(100); //Just
here to slow down the output.
}
Step 5: Final testing
1. Use
the noted values to edit the final code attached and to change the cellphone
number in code and then write the code in arduino.
2. Open
serial monitor and wait
3. serial
monitor will show "status OK" and soon will send sms to the
cellphone.
#include "SIM900.h"
#include <SoftwareSerial.h>
//#include "inetGSM.h"
#include "sms.h"
SMSGSM sms;
int numdata;
int value;
boolean started=false;
char smsbuffer[160];
char n[20];
int PIN = A0;
int sensor = 450;
int LED1 = 11;
void setup()
{
pinMode(LED1,
OUTPUT);
pinMode (PIN,INPUT);
value = analogRead
(PIN);
Serial.begin(9600);
Serial.println(value);
Serial.println("GSM Shield testing.");
if (value >
sensor){
digitalWrite(LED1,
HIGH);
}
if
(gsm.begin(2400)){
Serial.println("\nstatus=READY");
started=true;
}
else
Serial.println("\nstatus=IDLE");
if (value >
sensor){
digitalWrite(LED1,
HIGH);
(sms.SendSMS("+919461022454", "RJ27 CB 3**9 Pollution
Level Exceeding , Attention Required "));
Serial.println("\nSMS sent OK");
}
};
void loop()
{
if(started){
if(gsm.readSMS(smsbuffer, 160, n, 20))
{
Serial.println(n);
Serial.println(smsbuffer);
}
}
};
