GSM Pump Motor Controller Circuit using Arduino

In this
post we are going to construct a farmer friendly GSM pump motor controller circuit which could
turn on and off the irrigation system remotely from anywhere in the
world via SMS and return you with an acknowledgement message. The idea was requested by Mr. PG Ragavandir.

By: Girish Radhakrishnan  

The Request

Dear Sir,

Greeting for the day, sir I’m looking for a circuit which Pump Motor get ‘ON’ & ‘OFF’by using Remote or by mobile message for around 10 Km surrounding, it will be used for Farmers for there land (which they can be bit tension free). if possible can you help me for supporting them please.

Thanks & Best Regards
PG Ragavandir

The Design

Agriculture is one of biggest industry in India which serves food for more than a billion people every year. Producing vast amount of food is never an easy task; irrigation is one of the factor. 

Most of the agriculturist’s crop field is situated far from their residence, just turning on the water pump costs huge for their transportation per year.

India is known for IT skills and space programs and reached mars less than cost of movie “Gravity”, this signify the great potential among Engineers and Scientists. But, the skills are not uniformly distributed across different fields; agriculture is one of the field where technological development is slow.  

This Arduino based GSM pump motor controller circuit takes a baby step towards agricultural development, this may not be a revolutionary project but, it may bring delight among agriculturists.

Let’s dive into technical part of the project.

The project is designed with minimal hardware components so that a beginner can accomplish it with ease. 
The circuit consists of power supply, which powers the whole setup. 

The arduino is the brain of the project which take decisions and GSM modem which sends and receives text SMS and communicate with the user and relay which controls the motor.

The Circuit:

GSM Pump Motor Controller Circuit using Arduino

 
 
The transformer step down the 230VAC to 12VAC and bridge rectifier convert AC onto DC current and the current passes through an electrolytic capacitor to smooth the power supply.

A fixed 12V voltage regulator gives power to arduino, GSM modem and relay. The GSM modem is connected to arduino at pin #0 and pin #1, which are RX and TX respectively.

The RX of GSM is connected to TX of arduino and TX of GSM is connected to RX of arduino. If you are confused, just look at the below diagram, misconnection will not send or receive SMS.

                     ARDUINO       TX———————-RX     GSM modem
                                              RX———————-TX

Ground to ground connection is also established between arduino and GSM modem.

Try to get a male jack power connector for the GSM and arduino, if not just solder the wires directly from power supply to arduino and GSM, which might increase the mess in the project.

The transistor drives the relay and the diode protects the circuit from high voltage spikes while switching the relay ON/OFF. 

The LED indicator shows the status of the relay. If the LED glows the relay activated and if the LED is off the relay is deactivated.

Insert a valid SIM on the GSM modem and try to take advantage of the offers availed by the network provider for SMS such as rate cutters, which will reduce the expenses for SMS.

Program:

//—————-Program developed by R.Girish————//
int LED = 8;
int motor = 9;
int temp=0;
int i=0;
char str[15];
void setup()
{
  Serial.begin(9600);
  pinMode(motor,OUTPUT);
  pinMode(LED,OUTPUT);
  digitalWrite(motor,LOW);
  digitalWrite(LED,LOW);
  delay(20000);
  delay(20000);
  delay(20000);
  Serial.println(“AT+CNMI=2,2,0,0,0”);
  delay(1000);
  Serial.println(“AT+CMGF=1”);
  delay(500);
  Serial.println(“AT+CMGS=”+91xxxxxxxxxx”r”); // Replace x with mobile number
  delay(1000);
  Serial.println(“System is ready to receive commands.”);// The SMS text you want to send
  delay(100);
  Serial.println((char)26); // ASCII code of CTRL+Z
  delay(1000);
}
void loop()
{
  if(temp==1)
  {
    check();
    temp=0;
    i=0;
    delay(1000);
  }
}
 void serialEvent()
 {
  while(Serial.available())
  {
    if(Serial.find(“/”))
    {
      delay(1000);
      while (Serial.available())
      {
      char inChar=Serial.read();
      str[i++]=inChar;
      if(inChar==’/’)
      {
        temp=1;
        return;
      }
      }
    }
   }
 }
void check()
{
   if(!(strncmp(str,”motor on”,8)))
    {
      digitalWrite(motor,HIGH);
      digitalWrite(LED,HIGH);
      delay(1000); 
      Serial.println(“AT+CMGS=”+91xxxxxxxxxx”r”); // Replace x with mobile number
      delay(1000);
      Serial.println(“Motor Activated”);// The SMS text you want to send
      delay(100);
      Serial.println((char)26); // ASCII code of CTRL+Z
      delay(1000);
    } 
   else if(!(strncmp(str,”motor off”,9)))
    {
      digitalWrite(motor,LOW);
      digitalWrite(LED,LOW);
      delay(1000); 
      Serial.println(“AT+CMGS=”+91xxxxxxxxxx”r”); // Replace x with mobile number
      delay(1000);
      Serial.println(“Motor deactivated”);// The SMS text you want to send
      delay(100);
      Serial.println((char)26); // ASCII code of CTRL+Z
      delay(1000);

else if(!(strncmp(str,”test”,4)))
{
      Serial.println(“AT+CMGS=”+91xxxxxxxxxx”r”); // Replace x with mobile number
      delay(1000);
      Serial.println(“The System is Working Fine.”);// The SMS text you want to send
      delay(100);
      Serial.println((char)26); // ASCII code of CTRL+Z
      delay(1000);
}
}  
//—————-Program developed by R.Girish————//

 NOTE 1: While compiling the program it shows a warning, which you can ignore it. The program is verified and tested.

NOTE 2: Please remove TX and RX connection from arduino while uploading the code.

NOTE 3: Replace “xxxxxxxxxxxxx” with recipient’s phone number in 4 places in the program. 

NOTE 4: Please purchase a GSM modem without power button in the module; in case of power failure it won’t latch in into mobile network unless you manually press the button, so avoid such type of GSM modems. The GSM modem one without power button will latch into mobile network directly after power retains.

Author’s Prototype of GSM Pump Motor Controller Circuit:

 
 
How to use the above setup:

•    Use /motor on/ to activate the relay.

•    Use /motor off/ to deactivate the relay.

•    Use /test/ for testing the response from the circuit.

Start the command with”/” and end with “/” otherwise it won’t accept as valid request.

•    /motor on/ will turn ON the relay and return with an acknowledgement SMS “Motor Activated.”

•    /motor off/ will turn off the relay and return with an acknowledgement SMS “Motor Deactivated.”

•    If you send /test/ it will return with an acknowledgement SMS “The System is Working Fine.”

•    The above message signifies that your setup is working fine.      

•    If no acknowledgement is returned to you can assume that no action is preceded on the motor and you may troubleshoot the problems.

•    After powering the setup ON wait for 1 minute the system will send an acknowledgement SMS “System is ready to accept commands.” once you receive this SMS your project is ready to serve. 

The above commands are fool proof and never trigger the motor falsely, the setup will not respond any SMS other than the above specified commends.

46 Replies to “GSM Pump Motor Controller Circuit using Arduino”

  1. Kesava Raj

    Sir i have one doubt abt PIR SENSOR…
    I bought from Amazon.Using rest room Pir sensor out..connected with transistor & relay its working well…but sometimes its flashing..
    While flashing time i enter inside its working well…whats the reason for flashing..

    Reply
    1. Swagatam Post author

      It could be due to some stray signal pick up, try connecting a 10uF or any high value capacitor across base/emitter of the transistor and check the response

      Reply
  2. Kesava Raj

    Already i connected sir…10uf 63v electrolyatic capacitor…same prblm coming sir…..when i enter inside it glowing well the flashing will be stop…and after 3 min it will be off …after 1 hour it will be flashing.
    Sensor problem means it won't work when we enter…

    Reply
    1. Swagatam Post author

      try connecting a filter capacitor immediately across the supply pins of the PIR, and also connect an LED in series with the transistor base and PIR o/p pin…..just to monitor the PIR output response….

      Reply
    2. Kesava Raj

      I'm using NPN transistor …
      Transistor base want to connect ANODE of LED ?
      and CATHODE of led to PIR o/p….

      We want to use resistor & led in series or only led in series

      Reply
    3. Swagatam Post author

      anode will connect with PIR o/p, and cathode towards the transistor base with the resistor in series…the resistor can come at the LeD anode or at the LeD cathode.

      PIR——>|—-^^^^—–base

      PIR——^^^^—–>|—–base

      Reply
    4. Kesava Raj

      In u r PIR post i see one..ckt
      In the transistor emitter and base across one capacitor 25V 470uf…

      I make in my circuit..Now its working fine sir…

      I want to know the reason ..
      1.Y its making flashing while I'm using 10uf capacitor…
      2.when we increase capacitor value it not flashing and working good..
      What is the function of capacitor in this PIR circuit…

      Now its working well..
      I'm so happy sir..

      Thank u very much sir..

      Reply
    5. Swagatam Post author

      Kesava, I am glad you could correct the fault, however flashing should not have happened, that's something you will have to identify yourself, or you can change the PIR and see if the fault persists.

      increasing the capacitor effectively grounded the stray signals which was causing the fluctuations, and therefore the flashing stopped

      Reply
  3. Kesava Raj

    Instead of using PIR .I have one idea by using IR ,PHOTO DIODE and CD4017…when we give one postive pulse to PIN 14 the CD 4017 One channel will active i seen this circuit in Infrared using on off for home appliance…
    .I'm modifying the circuit..I'm using IR bulb it will continuously glow when we enter inside the ir will reflect the signal to photodiode . The photo diode will give signal to PNP transistor to activate the CD4017..now the o/p will be active…when we go outside of the room the reflection will happen again and the o/p will be off…

    I didn't try this circuit….If it's correct means i will try sir….pls give me SUGGESTIONS sir….

    Reply
    1. Swagatam Post author

      yes you can alternatively try other types of sensors for sensing an intrusion.

      you can try a proximity detector circuit for the same.

      surely a 4017 flip flop circuit can be used for implementing the toggling action of a relay by integrating it with any form of intrusion detector sensor.

      Reply
  4. ragavan ganapathy

    Dear Sir,

    Thanks for your response for this circuit, and I thank Mr. Radhakrishnan too.

    I will try to make this, If I achieved this for sure will tell your name & Mr. Radhakrishnan's name to whom all I try to help.

    Great for you both, may GOD bless

    Thanks & Best Regards
    PG Ragavandir

    Reply
  5. ragavan ganapathy

    Dear Sir,

    As you told Circuit is working sir, I got the commend(System is ready to accept commands)when we switch "ON" the circuit.

    But after getting that how many calls I have to do? I tried calling that number (call is going) but Relay is not getting activated and LED is also not glowing. Please help me to solve this problem sir.

    Best Regards
    PG Ragavandir

    Reply
    1. Girish Radhakrishnan

      Hi Ragavan,

      Your system is working fine if you receive "System is ready to accept commands".

      You must send text SMS to the number not calling.

      Use /motor on/ to activate the relay.

      Use /motor off/ to deactivate the relay.

      Use /test/ for testing the response from the circuit.

      Start the command with”/” and end with “/” otherwise it won’t accept as valid request.

      Try to read the complete article as it is mentioned in the post 🙂

      Regards

      Reply
    2. ragavan ganapathy

      Dear Swagatam Sit & Radhakrishnan Sir,

      Thanks for your immediate reply.

      As you told I did sir but sorry for saying, same message is coming as ready,

      Now I connected Arduino with PC to check comment prompt. In that I gave comment as your instruction but same happening sir. Relay is not switching "ON or OFF"

      Sir if possible can you please share your phone number or Gmail ID so that call or chat. Please help

      Best Regards
      PG Ragavandir

      Reply
    3. Girish Radhakrishnan

      Hi ragavan,

      I think you are totally confused!!!

      you must send SMS commands as mentioned earlier from your mobile (the number which you have entered in the code) to the number of sim card which you have inserted in GSM module. That's all, and you will receive an acknowledgement SMS from GSM module. Every time you power on you will get that test SMS.

      Command prompt??? you mean serial monitor? No need to type any comment on that and no need to connect arduino to PC other than uploading the code.

      Any problem we are here to help.

      Best Regards

      Reply
    4. ragavan ganapathy

      Dear Sir,

      Thanks for your reply, sorry for my late reply.

      I have to send SMS from my phone to the SIM in GSM number like "Motor ON & Motor OFF" right?

      Your right as you told I have typed in serial monitor only sir, sorry.

      Now will try and tell the result.

      Best Regards
      PG Ragavandir

      Reply
    5. ragavan ganapathy

      Dear Sir,

      Working sir, thanks a lot, "HATS OFF" for both,

      but this is working through only sending SMS "motor ON" and "motor OFF"? or we can Call and control also?

      Best Regards
      PG Ragavandir

      Reply
  6. Ranjan Sha

    Dear Girish sir,
    I copy the program and replace "xxxxxxxx" by phone no. and compiled it,uploaded by aurdino software 1.0.3 version
    Then I use gsm module sim800a
    It has 4 no. of pin Tx,Rx,gnd,5v
    I connect
    Rx of aurdino——->Tx of gsm
    Tx of aurdino——->Rx of gsm
    gnd of aurdino——->gnd of gsm
    5V of aurdino——->5V of gsm
    Then give the supply to aurdino uno board
    I use airtel 4g sim with 2g accessible
    But it doesn't give any reply to the programmed phone number

    Reply
    1. Girish Radhakrishnan

      Hi Ranjan,

      Replace "XXXXX" with your phone number with +91 country code at beginning.

      Do NOT use 5V arduino supply to GSM modem. You should power it separately from a wall adapter with 9V.

      Let me know whether your GSM modem has power button, if so you should to press the power button for 3 seconds.

      Make sure that your sim card is latched into mobile network. You can confirm this by looking at network LED blinking once every 3 seconds and not blinking at faster rate continuously.

      Regards

      Reply
    1. Girish Radhakrishnan

      Hi Ranjan,

      You have a slightly different kind of GSM modem than what I imagined, no problem.

      you can test the GSM modem by following the link in the previous comment and comment your issues, let's resolve it.

      Regards.

      Reply
  7. Ranjan Sha

    In this gsm module there are 3 led red,green,yellow and a buzzer.When i give supply to the gsm module the buzer is beep and red and yellow led is blink fast 3-4 time then off up to 30sec and the green led is always on

    Reply
  8. Unknown

    Good morning,
    Very good work. I want to ask if I want to put four relay;
    What change in the code;
    And command if(!(strncmp(str,"motor on",8))). The number 8 it says;
    I tried the code on A6 GSM and it works fine.
    Thank you very much.

    Reply

Leave a Reply

Your email address will not be published. Required fields are marked *