#include <SoftwareSerial.h>
    SoftwareSerial SIM900(10, 11);
    String textMessage;
    #define LED1 2
    #define IRLED 3
    //#define rf433DATA 4
    //D4 IS CONNECTED TO RF433MHZ RECEIVER CHANGE ACC TO LIBRARY
    #define PIRpower 5
    int receiver = 6;
    #define VALVE1 7
    #define GSMRESET 8
    #define pumpONdetect 9
    #define VALVE2 12
    //#define TANK_SENSPOWER 13 //
    #define TANK_SENS4 A0  //full tank wigh buzzer
    #define TANK_SENS3 A1
    #define TANK_SENS2 A2
    #define TANK_SENS1 A3  //low tank
    int TKLVL= 0;
    int LEVEL;
    
    void setup()
    { pinMode(LED1, OUTPUT);
      pinMode(IRLED, OUTPUT);
      pinMode(PIRpower, OUTPUT);
      //CHECK RECEIVER PIN
      pinMode(GSMRESET, OUTPUT);
      pinMode(VALVE2, OUTPUT);
      // pinMode(TANK_SENSPOWER, OUTPUT); //DRIVE THIS PIN LOW TO ON TANK POWER(PNP TRANSISTOR)
      pinMode(TANK_SENS4, INPUT); //FULL TANK WITH BEEP BUZZER
      pinMode(TANK_SENS3, INPUT);
      pinMode(TANK_SENS2, INPUT);
      pinMode(TANK_SENS1, INPUT); //LOW TANK WATER
      // digitalWrite(TANK_SENSPOWER, HIGH); //turns OFF tanksenspower OFFvia PNP transistor..
      Serial.begin(9600);
      SIM900.begin(9600);
      Serial.print("SIM900 ready...");
      SIM900.println("AT+CMGD=1,4\r");
      delay(1000);
      // AT command to set SIM900 to SMS mode
      SIM900.println("AT+CMGF=1\r");
      delay(400);
      // Set module to send SMS data to serial out upon receipt
      SIM900.println("AT+CNMI=2,2,0,0,0\r");
      delay(400);
      digitalWrite(VALVE1, LOW);
    
    }
    
    void loop()
    {
      if (SIM900.available() > 0) {
        textMessage = SIM900.readString();
        Serial.print(textMessage);
        delay(10);
      }
      if (textMessage.indexOf("Von") >= 0)
      {
        G_valve1On();
        Serial.println("on loop");
        textMessage = "";
      }
      if (textMessage.indexOf("Voff") >= 0)
      {
        G_valve1Off();
        Serial.println("off loop");
        textMessage = "";
      }
    
      if (textMessage.indexOf("Tanklvl") >= 0)
      {
        Tanklvl_calc();
         Serial.print("TKLVL is=");
         Serial.println(TKLVL);
        //  TKLVL=LEVEL;
        // Serial.print("level is=");
        //Serial.println(LEVEL);
        String msg ="TANK IS " + TKLVL; 
        Serial.println(msg);   
        sendSMS(msg);
        textMessage = "";
      }
    
    }
    //SEND SMS function
    void sendSMS(String lvlmsg)
    {
      SIM900.print("AT+CMGF=1\r");
      delay(1000);
      SIM900.println("AT+CMGS=\"+918237504767\"\r");
      delay(100);
      SIM900.println(lvlmsg);
      delay(100);
      SIM900.println((char)26);
      delay(1000);
      SIM900.println();
      delay(5000);
    }
    
    
    
    void G_valve1On()
    {
      digitalWrite(VALVE1, HIGH);
      Serial.println("...turning valve1 on...");
    }
    void G_valve1Off()
    {
      digitalWrite(VALVE1, LOW);
      Serial.println("...turningvalve1 off...");
    }
    
    
    int Tanklvl_calc()
    {
      if (digitalRead(TANK_SENS4) == HIGH)
      {    
        TKLVL = 100;
        Serial.println("TANK LEVEL 100%");
      }
      else if (digitalRead(TANK_SENS3) == HIGH)
      {    
        TKLVL = 75;
        Serial.println("TANL LEVEL 75%");
      }
      else if (digitalRead(TANK_SENS2) == HIGH)
      {    
        TKLVL = 50;
        Serial.println("TANK LEVEL 50%");
      }
      else if (digitalRead(TANK_SENS1) == HIGH)
      {
        TKLVL = 25;
        Serial.println("TANK LEVEL 25%");
      }
      else
      { 
        TKLVL = 0;
        Serial.println("TANK LEVEL IS LESS THAN 25%");
      }  
      return(TKLVL);
    }

    #include <SoftwareSerial.h>
    SoftwareSerial SIM900(10, 11);
    String textMessage;
    #define LED1 2
    #define IRLED 3
    //#define rf433DATA 4
    //D4 IS CONNECTED TO RF433MHZ RECEIVER CHANGE ACC TO LIBRARY
    #define PIRpower 5
    int receiver = 6;
    #define VALVE1 7
    #define GSMRESET 8
    #define pumpONdetect 9
    #define VALVE2 12
    //#define TANK_SENSPOWER 13 //
    #define TANK_SENS4 A0  //full tank wigh buzzer
    #define TANK_SENS3 A1
    #define TANK_SENS2 A2
    #define TANK_SENS1 A3  //low tank
    int TKLVL= 0;
    int LEVEL;
    
    void setup()
    { pinMode(LED1, OUTPUT);
      pinMode(IRLED, OUTPUT);
      pinMode(PIRpower, OUTPUT);
      //CHECK RECEIVER PIN
      pinMode(GSMRESET, OUTPUT);
      pinMode(VALVE2, OUTPUT);
      // pinMode(TANK_SENSPOWER, OUTPUT); //DRIVE THIS PIN LOW TO ON TANK POWER(PNP TRANSISTOR)
      pinMode(TANK_SENS4, INPUT); //FULL TANK WITH BEEP BUZZER
      pinMode(TANK_SENS3, INPUT);
      pinMode(TANK_SENS2, INPUT);
      pinMode(TANK_SENS1, INPUT); //LOW TANK WATER
      // digitalWrite(TANK_SENSPOWER, HIGH); //turns OFF tanksenspower OFFvia PNP transistor..
      Serial.begin(9600);
      SIM900.begin(9600);
      Serial.print("SIM900 ready...");
      SIM900.println("AT+CMGD=1,4\r");
      delay(1000);
      // AT command to set SIM900 to SMS mode
      SIM900.println("AT+CMGF=1\r");
      delay(400);
      // Set module to send SMS data to serial out upon receipt
      SIM900.println("AT+CNMI=2,2,0,0,0\r");
      delay(400);
      digitalWrite(VALVE1, LOW);
    
    }
    
    void loop()
    {
      if (SIM900.available() > 0) {
        textMessage = SIM900.readString();
        Serial.print(textMessage);
        delay(10);
      }
      if (textMessage.indexOf("Von") >= 0)
      {
        G_valve1On();
        Serial.println("on loop");
        textMessage = "";
      }
      if (textMessage.indexOf("Voff") >= 0)
      {
        G_valve1Off();
        Serial.println("off loop");
        textMessage = "";
      }
    
      if (textMessage.indexOf("Tanklvl") >= 0)
      {
        Tanklvl_calc();
         Serial.print("TKLVL is=");
         Serial.println(TKLVL);
        //  TKLVL=LEVEL;
        // Serial.print("level is=");
        //Serial.println(LEVEL);
        String msg ="TANK IS " + TKLVL; 
        Serial.println(msg);   
        sendSMS(msg);
        textMessage = "";
      }
    
    }
    //SEND SMS function
    void sendSMS(String lvlmsg)
    {
      SIM900.print("AT+CMGF=1\r");
      delay(1000);
      SIM900.println("AT+CMGS=\"+9182375*****\"\r");
      delay(100);
      SIM900.println(lvlmsg);
      delay(100);
      SIM900.println((char)26);
      delay(1000);
      SIM900.println();
      delay(5000);
    }
    
    
    
    void G_valve1On()
    {
      digitalWrite(VALVE1, HIGH);
      Serial.println("...turning valve1 on...");
    }
    void G_valve1Off()
    {
      digitalWrite(VALVE1, LOW);
      Serial.println("...turningvalve1 off...");
    }
    
    
    int Tanklvl_calc()
    {
      if (digitalRead(TANK_SENS4) == HIGH)
      {    
        TKLVL = 100;
        Serial.println("TANK LEVEL 100%");
      }
      else if (digitalRead(TANK_SENS3) == HIGH)
      {    
        TKLVL = 75;
        Serial.println("TANL LEVEL 75%");
      }
      else if (digitalRead(TANK_SENS2) == HIGH)
      {    
        TKLVL = 50;
        Serial.println("TANK LEVEL 50%");
      }
      else if (digitalRead(TANK_SENS1) == HIGH)
      {
        TKLVL = 25;
        Serial.println("TANK LEVEL 25%");
      }
      else
      { 
        TKLVL = 0;
        Serial.println("TANK LEVEL IS LESS THAN 25%");
      }  
      return(TKLVL);
    }

I Want to check water level and get sms of it via gsm module.REED switches are connected to four arduino analog inputs. I am unable to add string + tank level (TKLVL) in program. Programme is sending some garbage value via sms.But TKLVL variable prints right value.

PLZ CHECK THIS CODE:

1. #include <SoftwareSerial.h> SoftwareSerial SIM900(10, 11); String textMessage; #define LED1 2 #define IRLED 3 //#define rf433DATA 4 //D4 IS CONNECTED TO RF433MHZ RECEIVER CHANGE ACC TO LIBRARY #define PIRpower 5 int receiver = 6; #define VALVE1 7 #define GSMRESET 8 #define pumpONdetect 9 #define VALVE2 12 //#define TANK_SENSPOWER 13 // #define TANK_SENS4 A0 //full tank wigh buzzer #define TANK_SENS3 A1 #define TANK_SENS2 A2 #define TANK_SENS1 A3 //low tank int TKLVL= 0; int LEVEL;

   void setup()
   { pinMode(LED1, OUTPUT);
     pinMode(IRLED, OUTPUT);
     pinMode(PIRpower, OUTPUT);
     //CHECK RECEIVER PIN
     pinMode(GSMRESET, OUTPUT);
     pinMode(VALVE2, OUTPUT);
     // pinMode(TANK_SENSPOWER, OUTPUT); //DRIVE THIS PIN LOW TO ON TANK POWER(PNP TRANSISTOR)
     pinMode(TANK_SENS4, INPUT); //FULL TANK WITH BEEP BUZZER
     pinMode(TANK_SENS3, INPUT);
     pinMode(TANK_SENS2, INPUT);
     pinMode(TANK_SENS1, INPUT); //LOW TANK WATER
     // digitalWrite(TANK_SENSPOWER, HIGH); //turns OFF tanksenspower OFFvia PNP transistor..
     Serial.begin(9600);
     SIM900.begin(9600);
     Serial.print("SIM900 ready...");
     SIM900.println("AT+CMGD=1,4\r");
     delay(1000);
     // AT command to set SIM900 to SMS mode
     SIM900.println("AT+CMGF=1\r");
     delay(400);
     // Set module to send SMS data to serial out upon receipt
     SIM900.println("AT+CNMI=2,2,0,0,0\r");
     delay(400);
     digitalWrite(VALVE1, LOW);
   
   }
   
   void loop()
   {
     if (SIM900.available() > 0) {
       textMessage = SIM900.readString();
       Serial.print(textMessage);
       delay(10);
     }
     if (textMessage.indexOf("Von") >= 0)
     {
       G_valve1On();
       Serial.println("on loop");
       textMessage = "";
     }
     if (textMessage.indexOf("Voff") >= 0)
     {
       G_valve1Off();
       Serial.println("off loop");
       textMessage = "";
     }
   
     if (textMessage.indexOf("Tanklvl") >= 0)
     {
       Tanklvl_calc();
        Serial.print("TKLVL is=");
        Serial.println(TKLVL);
       //  TKLVL=LEVEL;
       // Serial.print("level is=");
       //Serial.println(LEVEL);
       String msg ="TANK IS " + TKLVL; 
       Serial.println(msg);   
       sendSMS(msg);
       textMessage = "";
     }
   
   }
   //SEND SMS function
   void sendSMS(String lvlmsg)
   {
     SIM900.print("AT+CMGF=1\r");
     delay(1000);
     SIM900.println("AT+CMGS=\"+918237504767\"\r");
     delay(100);
     SIM900.println(lvlmsg);
     delay(100);
     SIM900.println((char)26);
     delay(1000);
     SIM900.println();
     delay(5000);
   }
   
   
   
   void G_valve1On()
   {
     digitalWrite(VALVE1, HIGH);
     Serial.println("...turning valve1 on...");
   }
   void G_valve1Off()
   {
     digitalWrite(VALVE1, LOW);
     Serial.println("...turningvalve1 off...");
   }
   
   
   int Tanklvl_calc()
   {
     if (digitalRead(TANK_SENS4) == HIGH)
     {    
       TKLVL = 100;
       Serial.println("TANK LEVEL 100%");
     }
     else if (digitalRead(TANK_SENS3) == HIGH)
     {    
       TKLVL = 75;
       Serial.println("TANL LEVEL 75%");
     }
     else if (digitalRead(TANK_SENS2) == HIGH)
     {    
       TKLVL = 50;
       Serial.println("TANK LEVEL 50%");
     }
     else if (digitalRead(TANK_SENS1) == HIGH)
     {
       TKLVL = 25;
       Serial.println("TANK LEVEL 25%");
     }
     else
     { 
       TKLVL = 0;
       Serial.println("TANK LEVEL IS LESS THAN 25%");
     }  
     return(TKLVL);
   }
   

I want to check the water level and have an SMS sent via a GSM module. Reed switches are connected to four Arduino analog inputs.

I am unable to add a string and tank level (TKLVL) in program. The program is sending some garbage value via SMS. But TKLVL variable prints the right value.

What is wrong with my code?

    #include <SoftwareSerial.h>
    SoftwareSerial SIM900(10, 11);
    String textMessage;
    #define LED1 2
    #define IRLED 3
    //#define rf433DATA 4
    //D4 IS CONNECTED TO RF433MHZ RECEIVER CHANGE ACC TO LIBRARY
    #define PIRpower 5
    int receiver = 6;
    #define VALVE1 7
    #define GSMRESET 8
    #define pumpONdetect 9
    #define VALVE2 12
    //#define TANK_SENSPOWER 13 //
    #define TANK_SENS4 A0  //full tank wigh buzzer
    #define TANK_SENS3 A1
    #define TANK_SENS2 A2
    #define TANK_SENS1 A3  //low tank
    int TKLVL= 0;
    int LEVEL;
    
    void setup()
    { pinMode(LED1, OUTPUT);
      pinMode(IRLED, OUTPUT);
      pinMode(PIRpower, OUTPUT);
      //CHECK RECEIVER PIN
      pinMode(GSMRESET, OUTPUT);
      pinMode(VALVE2, OUTPUT);
      // pinMode(TANK_SENSPOWER, OUTPUT); //DRIVE THIS PIN LOW TO ON TANK POWER(PNP TRANSISTOR)
      pinMode(TANK_SENS4, INPUT); //FULL TANK WITH BEEP BUZZER
      pinMode(TANK_SENS3, INPUT);
      pinMode(TANK_SENS2, INPUT);
      pinMode(TANK_SENS1, INPUT); //LOW TANK WATER
      // digitalWrite(TANK_SENSPOWER, HIGH); //turns OFF tanksenspower OFFvia PNP transistor..
      Serial.begin(9600);
      SIM900.begin(9600);
      Serial.print("SIM900 ready...");
      SIM900.println("AT+CMGD=1,4\r");
      delay(1000);
      // AT command to set SIM900 to SMS mode
      SIM900.println("AT+CMGF=1\r");
      delay(400);
      // Set module to send SMS data to serial out upon receipt
      SIM900.println("AT+CNMI=2,2,0,0,0\r");
      delay(400);
      digitalWrite(VALVE1, LOW);
    
    }
    
    void loop()
    {
      if (SIM900.available() > 0) {
        textMessage = SIM900.readString();
        Serial.print(textMessage);
        delay(10);
      }
      if (textMessage.indexOf("Von") >= 0)
      {
        G_valve1On();
        Serial.println("on loop");
        textMessage = "";
      }
      if (textMessage.indexOf("Voff") >= 0)
      {
        G_valve1Off();
        Serial.println("off loop");
        textMessage = "";
      }
    
      if (textMessage.indexOf("Tanklvl") >= 0)
      {
        Tanklvl_calc();
         Serial.print("TKLVL is=");
         Serial.println(TKLVL);
        //  TKLVL=LEVEL;
        // Serial.print("level is=");
        //Serial.println(LEVEL);
        String msg ="TANK IS " + TKLVL; 
        Serial.println(msg);   
        sendSMS(msg);
        textMessage = "";
      }
    
    }
    //SEND SMS function
    void sendSMS(String lvlmsg)
    {
      SIM900.print("AT+CMGF=1\r");
      delay(1000);
      SIM900.println("AT+CMGS=\"+918237504767\"\r");
      delay(100);
      SIM900.println(lvlmsg);
      delay(100);
      SIM900.println((char)26);
      delay(1000);
      SIM900.println();
      delay(5000);
    }
    
    
    
    void G_valve1On()
    {
      digitalWrite(VALVE1, HIGH);
      Serial.println("...turning valve1 on...");
    }
    void G_valve1Off()
    {
      digitalWrite(VALVE1, LOW);
      Serial.println("...turningvalve1 off...");
    }
    
    
    int Tanklvl_calc()
    {
      if (digitalRead(TANK_SENS4) == HIGH)
      {    
        TKLVL = 100;
        Serial.println("TANK LEVEL 100%");
      }
      else if (digitalRead(TANK_SENS3) == HIGH)
      {    
        TKLVL = 75;
        Serial.println("TANL LEVEL 75%");
      }
      else if (digitalRead(TANK_SENS2) == HIGH)
      {    
        TKLVL = 50;
        Serial.println("TANK LEVEL 50%");
      }
      else if (digitalRead(TANK_SENS1) == HIGH)
      {
        TKLVL = 25;
        Serial.println("TANK LEVEL 25%");
      }
      else
      { 
        TKLVL = 0;
        Serial.println("TANK LEVEL IS LESS THAN 25%");
      }  
      return(TKLVL);
    }