SD conflict to Gear motor code with GSM

Using Arduino Microcontrollers
1

Hi, I'm getting a problem with my code.
I'm using GSM to trigger/turn on Gear motor and then save to SD card but the GSM automatically turn off.
note: GSM is connected to Arduino 1
and Gear motor pins and SD card are connected to Arduino 2, so im using I2C to communicate with GSM. :slight_smile:

if i tried SD or gear motor separate, they are both working fine just when i combined the two, i got GSM problem.

Here's the code for Gear Motor to turn on. no problem here.

int pwm=9;
int servobot=8;
int ldrbot=A4;
int ldrstate=0;
int old_ldrstate;  
void Setup()
{
}
Void loop()
{
}
void receiveEvent(int howMany)
{
while(Wire.available() > 0)
  {
    char c = Wire.read();
    numbers[i++] = c;
    numbers[i]='\0';
  }
 strcat(myBigArray, numbers);
    strcat(myBigArray, str);
    char letter;
if (SD.exists(myBigArray)) 
    {
      myFile = SD.open(myBigArray);
      if (myFile) {
        // read from the file until there's nothing else in it:
        while (myFile.available()) {
          ldrstate=digitalRead(ldrbot);
          ldrstate1=digitalRead(ldrbot1);
          letter =myFile.read();
          switch (letter) {
 case 'A':
    digitalWrite(servobot,HIGH);
            analogWrite(pwm,255);
            while(x<3)
            {
              old_ldrstate=ldrstate;
              ldrstate=digitalRead(ldrbot);
              if(ldrstate==LOW && old_ldrstate==HIGH) x=x+1;
            }
            delay(2000);
            digitalWrite(servobot,LOW);
            analogWrite(pwm,0);

            Serial.print(" Success");
            break;

and the code for SD card that i would like to insert is this.

    switch (letter) {
 case 'A':
 myFile.close();
   myFile = SD.open("Claim/Cookies.txt", FILE_WRITE);     //Write .txt file in SD, done.
            if (myFile) {
              myFile.println("1");
              myFile.close();
            }

but when i combine Gear and SD codes, the GSM turn off.

here's the combine code i've made.

int pwm=9;
int servobot=8;
int ldrbot=A4;
int ldrstate=0;
int old_ldrstate;  
void Setup()
{
}
Void loop()
{
}
void receiveEvent(int howMany)
{
while(Wire.available() > 0)
  {
    char c = Wire.read();
    numbers[i++] = c;
    numbers[i]='\0';
  }
 strcat(myBigArray, numbers);
    strcat(myBigArray, str);
    char letter;
if (SD.exists(myBigArray)) 
    {
      myFile = SD.open(myBigArray);
      if (myFile) {
        // read from the file until there's nothing else in it:
        while (myFile.available()) {
          ldrstate=digitalRead(ldrbot);
          ldrstate1=digitalRead(ldrbot1);
          letter =myFile.read();
          switch (letter) {
 case 'A':
    digitalWrite(servobot,HIGH);
            analogWrite(pwm,255);
            while(x<3)
            {
              old_ldrstate=ldrstate;
              ldrstate=digitalRead(ldrbot);
              if(ldrstate==LOW && old_ldrstate==HIGH) x=x+1;
            }
            delay(2000);
            digitalWrite(servobot,LOW);
            analogWrite(pwm,0);
// i just insert here the code of SD card so that when Gear motor is turn low, it will write to SD card.
 myFile.close();
   myFile = SD.open("Claim/Cookies.txt", FILE_WRITE);     //Write .txt file in SD, done.
            if (myFile) {
              myFile.println("1");
              myFile.close();
            }
            Serial.print(" Success");
            break;
2

my problem is in this loop,

 while(x<3)
            {
              old_ldrstate=ldrstate;
              ldrstate=digitalRead(ldrbot);
              if(ldrstate==LOW && old_ldrstate==HIGH) x=x+1;
            }

after it reach the condition.
the GSM will turn off.

3

Here's the code for Gear Motor to turn on. no problem here.

void Setup()  // problem is here..!! it should be setup().
{
}

i think it is not your complete code. if not kindly post your complete code.

4

here's my code sir, when the motor is turned on, it has no problem, only when this code reach the condition, then the problem occur.
while(x<3)
{
old_ldrstate=ldrstate;
ldrstate=digitalRead(ldrbot);
if(ldrstate==LOW && old_ldrstate==HIGH) x=x+1;
}

#include <SPI.h>
#include <SD.h>
#include <Wire.h>
File myFile;
#include<stdio.h>
#include<String.h>
char str[5]= ".txt";
long randNumber;
char numbers[20]="";
int x=0;
int y=0;
int S1;
int S2;
char i;
int a=0;
int b=0;
int d=0;
int pwm=9;
int servobot=8;
int ldrbot=A4;
int ldrstate=0;
int old_ldrstate=0;
char s;
char buf[50];
char bufs[70];
char message[180];
void setup()
{
  pinMode(pwm,OUTPUT);
  pinMode(servobot,OUTPUT);
  pinMode(ldrbot,INPUT);
  Wire.begin(5);
  Wire.onReceive(receiveEvent);
  Wire.onRequest(requestEvent);
  while (!Serial) {
    ; 
  }
  Serial.print("Initializing SD card...");
  pinMode(10, OUTPUT);
  if (!SD.begin(4)) {
    Serial.println("initialization failed!");
    return;
  }
  Serial.println("initialization done.");
}
void loop()
{

}
void receiveEvent(int howMany)
{
  while(Wire.available() > 0)
  {
    char c = Wire.read();
    numbers[i++] = c;
    numbers[i]='\0';
  }
  if (strcmp (numbers,"A")==0) {
    while(true)
    {
      randNumber = random('11111','99999');
      sprintf(buf,"%lu.txt",randNumber);
      sprintf(bufs,"code:%lu ordered: 2 ",randNumber);
      if(!SD.exists(buf))    
      {
        myFile = SD.open(buf, FILE_WRITE);     
        if (myFile) {
          myFile.println("A");
          myFile.close();
          break; 
        }
      }
    }
  }
  if (strcmp (numbers,"B")==0) {
    while(true)
    {
      randNumber = random('11111','99999');
      sprintf(buf,"%lu.txt",randNumber);
      sprintf(bufs,"code:%lu ordered: 3 ",randNumber);
      if(!SD.exists(buf))    
      {
        myFile = SD.open(buf, FILE_WRITE);    
        if (myFile) {
          myFile.println("B");
          myFile.close();
          break; 
        }
      }
    }
  }
  if(!strcmp (message,"A") ==0 && (!strcmp (message,"B")==0))
  {
    strcat(myBigArray, numbers);
    strcat(myBigArray, str);
    char letter;
    if (SD.exists(myBigArray)) 
    {
      myFile = SD.open(myBigArray);
      if (myFile) {
        // read from the file until there's nothing else in it:
        while (myFile.available()) {
          ldrstate=digitalRead(ldrbot);

          letter =myFile.read();
          switch (letter) {
          case 'A':
            myFile.close();
            myFile = SD.open("Claim/Cookies.txt", FILE_WRITE);     //Write .txt file in SD, done.
            if (myFile) {
              myFile.println("1");
              myFile.close();
            }
            digitalWrite(servobot,HIGH);
            analogWrite(pwm,255);
            while(x<3)
            {
              old_ldrstate=ldrstate;
              ldrstate=digitalRead(ldrbot);
              if(ldrstate==LOW && old_ldrstate==HIGH) x=x+1;
            }
            digitalWrite(servobot,LOW);
            reset();
            Serial.println("A Success");
            break;
          default:
            letter = '?';
            break;
          } 
          Serial.print("Letter ");  
          Serial.println(letter);
          letter='\0';
        }      

        SD.remove(myBigArray);

        Serial.print("Done!");
      }
    }
    else {
      Serial.println("example.txt doesn't exist.");
    }
    //    reset;
  }
}
void requestEvent()
{
  Wire.write(bufs);
  reset();
}
void reset()
{
  memset(buf, 0, 50);
  memset(bufs, 0, 70);
  memset(myBigArray, 0, 128);
  i='\0';
  x='\0';
  y='\0';
  numbers[0]='\0';
  randNumber='\0';
}
5

read the code comments.

if(!strcmp (message,"A") == 0 && (!strcmp (message,"B")== 0)) // if your condition is, messgase is not equal to A and B then do like this. if(strcmp (message,"A") != 0 && (strcmp (message,"B") != 0))
{
strcat(myBigArray, numbers); // myBigArray is not defind. Error..!!!
strcat(myBigArray, str);
char letter;
if (SD.exists(myBigArray))
{
myFile = SD.open(myBigArray);
if (myFile)
{
// read from the file until there's nothing else in it:
while (myFile.available()) {
ldrstate=digitalRead(ldrbot);

letter =myFile.read();
switch (letter) {
case 'A':
myFile.close();
myFile = SD.open("Claim/Cookies.txt", FILE_WRITE); //Write .txt file in SD, done.
if (myFile) {
myFile.println("1");
myFile.close();
}
digitalWrite(servobot,HIGH);
analogWrite(pwm,255);
while(x<3)
{
old_ldrstate=ldrstate;
ldrstate=digitalRead(ldrbot);
if(ldrstate==LOW && old_ldrstate==HIGH) x=x+1;
}
digitalWrite(servobot,LOW);
reset();
Serial.println("A Success");
break;
default:
letter = '?';
break;
}
Serial.print("Letter ");
Serial.println(letter);
letter='\0';
}
SD.remove(myBigArray); //here you are removing myBigArray so after first call your else part extecutes. because SD.open() does not getting myBigArray. i guess what you want is SD.open(pathname, MODE)
Serial.print("Done!");
}
}
else {
Serial.println("example.txt doesn't exist.");
}
// reset;
}