Problem occurred when using GSM shield

Projects General Guidance
1

Dear all,
I am trying to use GSM shield with my project using arduino mega. I have used digital pins 4, 5, 6, 8, ground, SDA, SCL,also spi pins 50,51,52,53 and 5v,3.3v. I am facing a problem that when I did not use the GSM everything worked fine. The moment I did the adjustment with the GSM and it worked the problem occured. The SD moudle didn't work anymore, as well as the RTC moudle... I don't know what I should do now.

The gsm shield I am using is:
https://store.arduino.cc/usa/arduino-gsm-shield-2-integrated-antenna

I have used this instruction to adjust the GSM by using a wire from tx to pin 10, and getting pin two out.

Did I miss up with something? it seems that when I added the gsm everything else doesn't work.

2

It is like either the gsm or the SD + RTC....

3

Please attach the current code and maybe also the working code before GSM being installed.

4

I have created two files and they both works. When I apply the one with GSM RTC, and SD moudle doesn't work, while when I try the one without GSM they both work fine. Here is the code with GSM and I will post the one without gsm in the next reply. I removed the function because the comment is more than 9000 char.

With GSM

#include <GSM.h>
#define PINNUMBER ""
GSM gsmAccess;
GSM_SMS sms;
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);
#include <MFRC522.h> // for the RFID
#include <SPI.h> // for the RFID and SD card module
#include <SD.h> // for the SD card
#include <RTClib.h> // for the RTC
// define pins for RFID
#define CS_RFID 53
#define RST_RFID 5
// define select pin for SD card module
#define CS_SD 4
// Create a file to store the data
File myFile;
// Instance of the class for RFID
MFRC522 rfid(CS_RFID, RST_RFID);
// Variable to hold the tag's UID
String Student;
// Instance of the class for RTC
RTC_DS1307 rtc;

// Define check in time
const int checkInHour = 01;
const int checkInMinute = 00;

//Variable to hold user check in
int userCheckInHour;
int userCheckInMinute;

// Pins for LEDs and buzzer
const int redLED = 8;
const int greenLED = 6;
const int buzzer = 23;

void setup() {
lcd.init(); // initialize the lcd
lcd.backlight();

// Set LEDs and buzzer as outputs
pinMode(redLED, OUTPUT);
pinMode(greenLED, OUTPUT);
pinMode(buzzer, OUTPUT);

// Init Serial port
Serial.begin(9600);
while(!Serial); // for Leonardo/Micro/Zero
Serial.println("SMS Messages Sender");
// connection state
boolean notConnected = true;

// Start GSM shield
// If your SIM has PIN, pass it as a parameter of begin() in quotes
while (notConnected) {
if (gsmAccess.begin(PINNUMBER) == GSM_READY) {
notConnected = false;

} else {
Serial.println("Not connected");
lcd.print("GSM not Connected");
delay(1000);
}
}

Serial.println("GSM initialized");
lcd.print("GSM Ready");
delay(1000);
lcd.clear();
// Init SPI bus
SPI.begin();
// Init MFRC522
rfid.PCD_Init();

// Setup for the SD card
Serial.print("Initializing SD card...");
lcd.print("Initializing ");
lcd.setCursor(0, 1);
lcd.print("SD card...");
delay(3000);
lcd.clear();

if(!SD.begin(CS_SD)) {
Serial.println("initialization failed!");
lcd.print("Initializing ");
lcd.setCursor(0, 1);
lcd.print("failed!");
return;
}
Serial.println("initialization done.");
Serial.println("SMS Messages Sender");
delay(200);

lcd.print("Please Swipe ID ");

// Setup for the RTC
if(!rtc.begin()) {
Serial.println("Couldn't find RTC");
lcd.clear();
lcd.print("Couldn't find RTC");
while(1);
}

else {
// following line sets the RTC to the date & time this sketch was compiled
rtc.adjust(DateTime(F(DATE), F(TIME)));
}

if(!rtc.isrunning()) {
Serial.println("RTC is NOT running!");
lcd.clear();
lcd.print("RTC Not Running!");
}
}

void loop() {
//look for new cards
MFRC522::MIFARE_Key key;
for (byte i = 0; i < 6; i++) {
key.keyByte = 0xFF;

  • }*
  • // Look for new cards*
  • if ( ! rfid.PICC_IsNewCardPresent()) {*
  • return;*
  • }*
  • // Select one of the cards*
  • if ( ! rfid.PICC_ReadCardSerial()) {*
  • return;*
  • }*
  • readRFID();*
    delay(10);
    }
    void readRFID() {
    lcd.clear();
    Serial.print("Card UID:");
  • for (byte i = 0; i < rfid.uid.size; i++) {*
    _ // Serial.print(mfrc522.uid.uidByte < 0x10 ? " 0" : " ");_
    _ // Serial.print(mfrc522.uid.uidByte*, DEC);
     }
     Serial.println();
     // Dump PICC type*
    * byte piccType = rfid.PICC_GetType(rfid.uid.sak);*
    * // Serial.print("PICC type: ");_
    //Serial.println(mfrc522.PICC_GetTypeName(piccType));
    if ( piccType != MFRC522::PICC_TYPE_MIFARE_MINI*
    * && piccType != MFRC522::PICC_TYPE_MIFARE_1K*
    * && piccType != MFRC522::PICC_TYPE_MIFARE_4K) {
    _ //Serial.println("This sample only works with MIFARE Classic cards.");
     return;
     }
     // defining Cards here*
    * // student1 59 98 E3 2A*
    * if( (rfid.uid.uidByte[0] == 0x59) && (rfid.uid.uidByte[1] == 0x98) && (rfid.uid.uidByte[2] == 0xE3) && (rfid.uid.uidByte[3] == 0x2A) ) // student1 card*
    * {
     tone(buzzer, 2000);
    delay(200);
    noTone(buzzer);
    delay(200);
     lcd.clear();
     lcd.print("Attended");
     delay(1000);
     lcd.clear();
     lcd.print("Welcome Ahmed");
     Serial.println("Ahmed");
     delay(1000);
     Student= "Ahmed";
     // for gsm
    sms.beginSMS("+966568123988");
    sms.print("Ahmed Attended");
    sms.endSMS();
     logCard();
     verifyCheckIn();
     delay(1000);
     lcd.clear();
     lcd.print("Message sent");
     delay(2000);*_

* lcd.clear();*
* lcd.print("Swipe Your ID");*
* return;*
* }*

* // student29 A2 14 A4*
* if( (rfid.uid.uidByte[0] == 0x29) && (rfid.uid.uidByte[1] == 0xA2) && (rfid.uid.uidByte[2] == 0x14) && (rfid.uid.uidByte[3] == 0xA4) ) // student2 card*
* {*
* tone(buzzer, 2000);*
*delay(200); *
noTone(buzzer);
* lcd.clear();*
* lcd.print("Attended");*
* delay(1000);*
* lcd.clear();*
* lcd.print("Welcome Khaled");*
* Serial.println("Khaled");*
* delay(1000);*
* Student= "Khaled";*
* // for gsm *
* sms.beginSMS("+966568123988");*
sms.print("Ahmed Attended");
sms.endSMS();
* logCard();*
* verifyCheckIn();*
* delay(1000);*
* lcd.clear();*
* lcd.print("Message sent");*
* delay(2000);*

* lcd.clear();*
* lcd.print("Swipe Your ID");*

* return;*
* }*
* if( (rfid.uid.uidByte[0] == 0xE9) && (rfid.uid.uidByte[1] == 0x56) && (rfid.uid.uidByte[2] == 0x57) && (rfid.uid.uidByte[3] == 0xA2) ) // student1 card*
* {*
* tone(buzzer, 2000);*
*delay(200); *
noTone(buzzer);
* lcd.clear();*
* lcd.print("Attended");*
* delay(1000);*
* lcd.clear();*
* lcd.print("Welcome Omar");*
* Serial.println("Omar");*
* delay(1000);*
* Student= "Omar";*
* // for gsm *
* sms.beginSMS("+966568123988");*
sms.print("Ahmed Attended");
sms.endSMS();

* logCard();*
* verifyCheckIn();*
* delay(1000);*
* lcd.clear();*
* lcd.print("Message sent");*
* delay(2000);*

* lcd.clear();*
* lcd.print("Swipe Your ID");*
* return;*
* }*
* if( (rfid.uid.uidByte[0] == 0x69) && (rfid.uid.uidByte[1] == 0x5A) && (rfid.uid.uidByte[2] == 0x04) && (rfid.uid.uidByte[3] == 0xA4) ) // student1 card*
* {*
* tone(buzzer, 2000);*
*delay(200); *
noTone(buzzer);
* lcd.clear();*
* lcd.print("Attended");*
* delay(1000);*
* lcd.clear();*
* lcd.print("Welcome Fahad");*
* Serial.println("Fahad");*
* delay(1000);*
* Student= "Fahad";*
* // for gsm *
* sms.beginSMS("+966568123988");*
sms.print("Ahmed Attended");
sms.endSMS();

* logCard();*
* verifyCheckIn();*
* delay(1000);*
* lcd.clear();*
* lcd.print("Message sent");*
* delay(2000);*

* lcd.clear();*
* lcd.print("Swipe Your ID");*
* return;*
* }*
* if( (rfid.uid.uidByte[0] == 0xD9) && (rfid.uid.uidByte[1] == 0x30) && (rfid.uid.uidByte[2] == 0x04) && (rfid.uid.uidByte[3] == 0xA4) ) // student1 card*
* {*
* tone(buzzer, 2000);*
*delay(200); *
noTone(buzzer);
* lcd.clear();*
* lcd.print("Attended");*
* delay(1000);*
* lcd.clear();*
* lcd.print("Welcome Saleh");*
* Serial.println("Saleh");*
* delay(1000);*
* Student= "Saleh";*
* // for gsm *
* sms.beginSMS("+966568123988");*
sms.print("Ahmed Attended");
sms.endSMS();
* logCard();*
* verifyCheckIn();*
* delay(1000);*
* lcd.clear();*
* lcd.print("Message sent");*
* delay(2000);*

* lcd.clear();*
* lcd.print("Swipe Your ID");*
* return;*
* }*
* else *

* Serial.println("unregistered user");*

tone(buzzer, 2000);
*delay(200); *
noTone(buzzer);
lcd.print("Wrong class");
delay(2000);
lcd.clear();
lcd.print("Swipe your ID");

// Sound the buzzer when a card is read
delay(200);
}

5

Here are the functions:
void logCard() {
// Enables SD card chip select pin
digitalWrite(CS_SD,LOW);

// Open file
myFile=SD.open("DATA.txt", FILE_WRITE);

// If the file opened ok, write to it
if (myFile) {
Serial.println("File opened ok");
lcd.clear();
lcd.print("File opened ok");
delay(2000);
myFile.print(Student);
myFile.print(" , ");

// Save time on SD card
DateTime now = rtc.now();
myFile.print(now.year(), DEC);
myFile.print('/');
myFile.print(now.month(), DEC);
myFile.print('/');
myFile.print(now.day(), DEC);
myFile.print(',');
myFile.print(now.hour(), DEC);
myFile.print(':');
myFile.println(now.minute(), DEC);

// Print time on Serial monitor
Serial.print(now.year(), DEC);
Serial.print('/');
Serial.print(now.month(), DEC);
Serial.print('/');
Serial.print(now.day(), DEC);
Serial.print(' ');
Serial.print(now.hour(), DEC);
Serial.print(':');
Serial.println(now.minute(), DEC);
Serial.println("sucessfully written on SD card");

lcd.clear();
lcd.print(now.year(), DEC);
lcd.print(':');
lcd.print(now.month(), DEC);
lcd.print(':');
lcd.print(now.day(), DEC);
lcd.print(' ');
lcd.setCursor(11, 0);
lcd.print(now.hour(), DEC);
lcd.print(':');
lcd.print(now.minute(), DEC);
lcd.setCursor(0, 1);
lcd.print("Written on SD...");
delay(2000);

myFile.close();

// Save check in time;
userCheckInHour = now.hour();
userCheckInMinute = now.minute();
}
else {

Serial.println("error opening data.txt");
lcd.clear();
lcd.print("error opening data.txt");
}
// Disables SD card chip select pin
digitalWrite(CS_SD,HIGH);
}

void verifyCheckIn(){
if((userCheckInHour < checkInHour)||((userCheckInHour==checkInHour) && (userCheckInMinute <= checkInMinute))){
digitalWrite(greenLED, HIGH);
delay(2000);
digitalWrite(greenLED,LOW);
Serial.println("On time");
lcd.clear();
lcd.print("On time");

}
else{
digitalWrite(redLED, HIGH);
delay(2000);
digitalWrite(redLED,LOW);
Serial.println("You are late...");
lcd.clear();
lcd.print("You are Late...");
delay(3000);
lcd.clear();

}
}

For the one without the shield I just remove the GSM library everything I have defined and gsm acceses and sms. Then remove this setup block as well as the one in the loop.
Serial.println("SMS Messages Sender");
// connection state
boolean notConnected = true;

// Start GSM shield
// If your SIM has PIN, pass it as a parameter of begin() in quotes
while (notConnected) {
if (gsmAccess.begin(PINNUMBER) == GSM_READY) {
notConnected = false;

} else {
Serial.println("Not connected");
lcd.print("GSM not Connected");
delay(1000);
}
}

6

I slept for few hours and now everything works? what. anyway thank you for the attempt of helping.

7

Haha. I've Heard those words wefore. Next time You post code read "How to use this Forum" #7, how to attach code using the code tags, </>.