covert char array to integers

Projects Programming
1

Hi,
I am designing a two energy meters on a same arduino. i calculated the energy and transmitting it using zigbee. i am receiving the data in the form a string. i Got the data from the string, but i need that data in the form of integers. so my question is how to convert the char array into integers?

2

Post your code.

But fundamentally, anything you an represent using a char, you can represent using an integer. char is 1 byte of data, int is 2 bytes of data on this platform.

char char_data = 4;
int int_data = (int)char_data;
3

@oz1994, I see you cross-posted / hijacked. Don't do that.

4

the transmitter code:

  Serial1.print("<");
   Serial1.print(E);Serial1.print(",");
    Serial1.print(E1); Serial1.print(">");

The receiver code:

int i;
int j;
#include <stdlib.h>
#include <string.h>


#define SOP '<'
#define EOP '>'

bool started = false;
bool ended = false;

char inData[80];
byte index;

void setup()
{
  Serial.begin(9600); 
  Serial1.begin(9600);
}

void loop()
{
  // Read all serial data available, as fast as possible
  while(Serial1.available() > 0)
  {
    char inChar = Serial1.read();
    if(inChar == SOP)
    {
       index = 0;
       inData[index] = '\0';
       started = true;
       ended = false;
    }
    else if(inChar == EOP)
    {
       ended = true;
       break;
    }
    else
    {
      if(index < 79)

inData[index] = inChar;
        index++;
        inData[index] = '\0';
      }
    }
    char *Data=NULL;
    if (started && ended)
  {
    //Serial.print(inData);
    //Serial.print("\n");
    Data =strtok(inData,",");
    while(Data != NULL)
    {
//Serial.print(Data);Serial.print("\n");
      Data=strtok(NULL,",");
      //delay(2000);
    }
i = atoi(strtok(inData,","));
j = atoi(strtok(NULL, ","));
while(1)
  {
Serial.print("A");
//Serial.print("I = ");
Serial.print(i);
//Serial.print("J =");
Serial.print(j);
delay(300);
   }
    
    //Reset
    started = false;
    ended= false;
    index = 0;
    inData[index]='\0';
  }

I am getting Value at "i" but zero at "j".

5

What did i Hijack??

6

Have a look at the parse example in serial input basics

...R

7

no, still not working.

8

oz1994:
no, still not working.

I'm not sure I have seen a less useful statement on the Forum.

WHAT is not working? - post your latest code
HOW is it not working? - describe the symptoms.

...R