Storing data from string to 2D array

Using Arduino Programming Questions
1

hello,i want to store data getting from ble scan i.e.storing_data1.length() and add it to 2D array.....

i write function like n = storing_data1.length();
char char_array[20][70]; // declaring character array
strcpy(char_array[n], storing_data1.c_str()); // copying the contents of the string to char array

      for (int i = 0; i < n; i++)
       {
         for (int j = 0; j < n; j++)
       {
          myArray[nr][nc] = myArray[nr][nc]++;
          Serial.print(char_array[i][j]);
        }
         Serial.print(char_array[i][j]);
        }

can anyone please help mw out i am new at this platform........thank you

2

something like this you mean?

void setup() {
  // put your setup code here, to run once:
  char char_array[10][10]; // declaring character array

  Serial.begin(115200);


  for (int i = 0; i < 10; ++i) {
    //dummy data from ble scan ;)
    String str = "String #";
    str += String(i + 1, DEC);
    //

    memcpy(&char_array[i][0], str.c_str(), str.length() + 1); //store data from string to 2D array
  }

  for (int j = 0; j < 10; ++j) {
    Serial.println(char_array[j]); //print out 2D array
  }

}

void loop() {
  // put your main code here, to run repeatedly:

}

Output:

String #1
String #2
String #3
String #4
String #5
String #6
String #7
String #8
String #9
String #10

be sure to check that your board has sufficient memory for the array size you want to use or the code will fail!

hope that helps....

5

just use an array of Strings then in place in a char 2D array and do storing_data1.c_str() conversion as and when you require to do so

6

Screenshot (7)
Screenshot (7)1920×1080 135 KB

@sherzaad when i refer code suggest by you i am getting output like in screenshot data get overlapped not get append......please suggest me something....
thank you....

7

Can you please post the code which is doing the scanning. Thanks.

8

please post the code you trialled...

10

post your FULL code or at LEAST one that compiles!

not snippets!

I have no idea what ur doing!!!!

your FOR loop

for (int i = 0; i < 10; ++i)

your WHILE loop

while(i>=31)

notice anything there....?

also as pointed out previously, just use an array of Strings in place of a 2D char array, or is there a reason you HAVE to use char array?

13

please stop spamming us with snippets!
If someone else can, good for you, but unfortunately I cannot make sense of your snippets!

AND PLEASE CONFIRM the following:

does the example code AS SHARED on reply #2 work for you??
not interested in any of your modding right now!

14