//original code created by TechToTinker
#include <SoftwareSerial.h> //used for GSM
SoftwareSerial sim800L(2, 3); //RXD, TXD
String cmd = "";


void setup() {
  
  Serial.begin(9600);
  Serial.println("Initializing");
  sim800L.begin(9600);
  delay(1000);

 pinMode(10, OUTPUT); //uses pin 10 for 5V source

  sim800L.println("AT");
  updateSerial();
  sim800L.println("AT+CMGF=1");
  updateSerial();
  sim800L.println("AT+CNMI=1,2,0,0,0");
  updateSerial();

}

void loop() {
  
updateSerial();

}

//USER DEFINED FUNCTIONS


void updateSerial(){
  delay(500);
  while (Serial.available()){
    cmd = (char)Serial.read();
    //cmd += (char)Serial.read();
    cmd.trim();
    if (cmd.equals("S") || cmd.equals("s")){
      testSMS();
    } else {
     sim800L.print(cmd);
     sim800L.println("");
    }
  }

  while (sim800L.available()){
    Serial.write(sim800L.read());
  }

}

void testSMS(){
  //Qamar's phone
  /*
  sim800L.println("AT+CMGF=1");
  delay(500);
  sim800L.println("AT+CMGS=\"+12816761164\"\r");
  delay(500);
  sim800L.println("Test Successful.");
  delay(500);
  sim800L.write(26);
  */
  //Jesse's phone
  sim800L.println("AT+CMGF=1");
  delay(500);
  sim800L.println("AT+CMGS=\"+18327956864\"\r");
  delay(500);
  sim800L.println("Test Successful!");
  delay(500);
  sim800L.write(26);

}