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Friday, July 5, 2019

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Smart Water Pump using GSM SIM900A module

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In this blog, I will explain you how to make a smart water pump which can be controlled by a cellular  phone.

Components Required

1. Arduino Uno
2. SIM 900A module
3. 9v Relay
4. Water Pump
5. 16*2 Lcd Display
6. I2c Display module
7. 9v Battery
8. Jumper wires

Circuit Diagram
Design in Fritzing 


In this circuit,I am using SIM900A module but you can also use SIM800L module.I am using SIM900A module due to following features.

  • Best suited for GSM based Microcontroller Projects (better than SIM300 and other GSM Modems)
  • Option for connecting MIC and SPEAKER directly to GSM MODEM for calls (LINE IN also available)
  • Compatible with ARDUINO, RASPBERRY PI, ARM, AVR, PIC, 8051, etc. - Can also be directly connected to computer via Serial Port (Use GSM Tester or write your own Software)
  • Supports communication through RS232 with DB9 Connector, TTL Pins & I2C Pins
  • CALL SMS GPRS facility - MIC input, LINE input & SPEAKER output pins.


Arduino Code


#include <LiquidCrystal_I2C.h>
#include <SoftwareSerial.h>
#include <EEPROM.h>
SoftwareSerial gsm(2, 3); // RX, TX
LiquidCrystal_I2C lcd(0x27, 16, 2);
// ----------- ----------- //
int address = 0; // <<<<<<< Change address = 10 in case of EEPROM failure.
int wr_call_add = 1; // <<<<<<<< Change wr_call_add = 11 in case of EEPROM failure.
int f_address = 2; // <<<<<<<<< Chnage f_address = 12 in case of EEPROM failure.
int eeprom_dead = 3; // <<<<<<<<<< Change eeprom_dead = 13 inc case of EEPROM failure.
// ----------- ----------- //
int wr_call_val = 0;
int f_value = 70;
int value = 0;
int ring = 0;
int i = 0;
int var = 0;
int eeprom_tst = 0;
int eeprom_tst_ack = 0;
int tst_var = 100;
int wr_call_tst = 100;
int eeprom_dead_val = 0;
String number = "";
String string = "";
const int output = 8;
boolean wait = true;
boolean at_flag = 1;
boolean net_flag = 1;
// ================ ============== //
char str[] = "91xxxxxxxxxx";
// ================= ============= //
// Replace xxxxxx your phone number starting with "91" which is India country code.
// Replce "91" with your own country code, if outside India.
void setup()
{
Serial.begin(9600);
lcd.init();
lcd.backlight();
gsm.begin(9600);
pinMode(output, OUTPUT);
if (EEPROM.read(f_address) != f_value)
{
EEPROM.write(f_address, f_value);
EEPROM.write(address, value);
EEPROM.write(wr_call_add, wr_call_val);
eeprom_dead_val = 0;
EEPROM.write(eeprom_dead, eeprom_dead_val);
}
if (EEPROM.read(eeprom_dead) == 1)
{
while (true)
{
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("EEPROM Error.");
lcd.setCursor(0, 1);
lcd.print("System Disabled.");
delay(1500);
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Reload the code");
lcd.setCursor(0, 1);
lcd.print("with new address");
delay(1500);
}
}
if (EEPROM.read(address) == 0)
{
digitalWrite(output, LOW);
gsm_init();
lcd.clear();
if (EEPROM.read(wr_call_add) == 0)
{
lcd.setCursor(0, 0);
lcd.print("Sending SMS");
lcd.setCursor(0, 1);
lcd.print("Acknowledgement.");
delay(1000);
gsm.println("AT+CMGF=1");
delay(500);
gsm.print("AT+CMGS=");
gsm.print("\"");
gsm.print(str);
gsm.println("\"");
delay(1000);
gsm.println("Motor is OFF / System is Ready.");
delay(100);
gsm.println((char)26);
}
if (EEPROM.read(wr_call_add) == 1)
{
wr_call_val = 0;
EEPROM.write(wr_call_add, wr_call_val);
}
}
if (EEPROM.read(address) == 1)
{
eeprom_test();
output_begin();
}
}
void(* resetFunc) (void) = 0;
void loop()
{
serialEvent();
if (ring == 1)
{
number = "";
var = string.indexOf("+CLIP: \"");
if (var > 0)
{
number += string.substring(var + 8, var + 13 + 7);
}
if (number[0] == str[0] && number[1] == str[1] && number[2] == str[2] && number[3] == str[3]
&& number[4] == str[4] && number[5] == str[5] && number[6] == str[6] && number[7] == str[7]
&& number[8] == str[8] && number[9] == str[9] && number[10] == str[10] && number[11] == str[11])
{
gsm.println("ATH");
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Incomming call");
lcd.setCursor(0, 1);
lcd.print("Number Verified.");
delay(2000);
if (EEPROM.read(address) == 0)
{
EEPROM.write(address, 1);
}
else if (EEPROM.read(address) == 1)
{
EEPROM.write(address, 0);
}
resetFunc();
}
if (!(number[0] == str[0] && number[1] == str[1] && number[2] == str[2] && number[3] == str[3]
&& number[4] == str[4] && number[5] == str[5] && number[6] == str[6] && number[7] == str[7]
&& number[8] == str[8] && number[9] == str[9] && number[10] == str[10] && number[11] == str[11]))
{
gsm.println("ATH");
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Unknown number");
lcd.setCursor(0, 1);
lcd.print("Call Rejected.");
wr_call_val = 1;
EEPROM.write(wr_call_add, wr_call_val);
delay(2000);
resetFunc();
}
}
if (EEPROM.read(address) == 0)
{
serialEvent();
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("System Standby");
lcd.setCursor(0, 1);
lcd.print("Status: OFF");
delay(1000);
}
else if (EEPROM.read(address) == 1)
{
lcd.setCursor(0, 0);
lcd.print("STATUS: ON");
lcd.setCursor(0, 1);
lcd.print("----------------");
}
}
void gsm_init()
{
lcd.print("System booting....");
lcd.setCursor(0, 1);
lcd.print("initiating......");
delay(1500);
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Checking Module");
lcd.setCursor(0, 1);
lcd.print("Connectivity....");
while (at_flag)
{
gsm.println("AT");
while (gsm.available() > 0)
{
if (gsm.find("OK"))
at_flag = 0;
}
delay(1000);
}
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Module");
lcd.setCursor(0, 1);
lcd.print("Connection: OK");
delay(1500);
eeprom_test();
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("System is Ready");
lcd.setCursor(0, 1);
lcd.print("----------------");
delay(1500);
}
void serialEvent()
{
while (gsm.available())
{
char read_char = gsm.read();
string += read_char;
i++;

if (string[i - 4] == 'R' && string[i - 3] == 'I' && string[i - 2] == 'N' && string[i - 1] == 'G' )
{
ring = 1;
}
}
}
void output_begin()
{
digitalWrite(output, HIGH);
if (EEPROM.read(wr_call_add) == 0)
{
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Sending SMS");
lcd.setCursor(0, 1);
lcd.print("Acknowledgement.");
delay(1000);
gsm.println("AT+CMGF=1");
delay(500);
gsm.print("AT+CMGS=");
gsm.print("\"");
gsm.print(str);
gsm.println("\"");
delay(1000);
gsm.println("Motor is ON.");
delay(100);
gsm.println((char)26);
}
if (EEPROM.read(wr_call_add) == 1)
{
wr_call_val = 0;
EEPROM.write(wr_call_add, wr_call_val);
}
lcd.clear();
}
void eeprom_test()
{
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Testing EEPROM");
lcd.setCursor(0, 1);
lcd.print("Memory.");
delay(1500);
eeprom_tst = EEPROM.read(address);
eeprom_tst_ack = EEPROM.read(wr_call_add);
EEPROM.write(address, tst_var);
EEPROM.write(wr_call_add, wr_call_tst);
if (EEPROM.read(address) == tst_var && EEPROM.read(wr_call_add) == wr_call_tst)
{
EEPROM.write(address, eeprom_tst);
EEPROM.write(wr_call_add, eeprom_tst_ack);
if (EEPROM.read(address) != eeprom_tst || EEPROM.read(wr_call_add) != eeprom_tst_ack)
{
digitalWrite(output, LOW);
eeprom_dead_val = 1;
EEPROM.write(eeprom_dead, eeprom_dead_val);
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("EEPROM Test is");
lcd.setCursor(0, 1);
lcd.print("Unsuccessful.");
delay(1500);
eeprom_sms();
}
else if (EEPROM.read(address) == eeprom_tst && EEPROM.read(wr_call_add) == eeprom_tst_ack)
{
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("EEPROM Test is");
lcd.setCursor(0, 1);
lcd.print("Successful.");
delay(1500);
}
}
else if (EEPROM.read(address) != tst_var || EEPROM.read(wr_call_add) != wr_call_tst)
{
digitalWrite(output, LOW);
eeprom_dead_val = 1;
EEPROM.write(eeprom_dead, eeprom_dead_val);
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("EEPROM Test is");
lcd.setCursor(0, 1);
lcd.print("Unsuccessful.");
delay(1500);
eeprom_sms();
}
}
void eeprom_sms()
{
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Sending SMS");
lcd.setCursor(0, 1);
lcd.print("Acknowledgement");
delay(1000);
gsm.println("AT+CMGF=1");
delay(500);
gsm.print("AT+CMGS=");
gsm.print("\"");
gsm.print(str);
gsm.println("\"");
delay(1000);
gsm.println("EEPROM error. System disabled. Please reload the code with new address.");
delay(100);
gsm.println((char)26);
while (true)
{
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("EEPROM Error.");
lcd.setCursor(0, 1);
lcd.print("System Disabled.");
delay(1500);
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Reload the code");
lcd.setCursor(0, 1);
lcd.print("with new address");
delay(1500);
}
}


Media Gallary


References
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