Driving me mad.  Integer to text for URL GET/

Forum 2005-2010 (read only) Hardware Interfacing
1

Hi, I've only been using the Arduino for a few days. I have programmed Mircochip PIC's before, though I'm no expert.

I have come up against a problem and have been banging my head against the wall for a while with it.

I have my Arduino talking to my server via ethernet and can store data in a MySQL database. The problem is, at the moment I can only send the same data over and over, as a static string.

The lines that make up the URL and pass the data are:

plen= es.ES_fill_tcp_data_p(buf,0, PSTR ( "GET /arduino_write.php?pwd=mypassword" ) );
plen= es.ES_fill_tcp_data_p(buf, plen, PSTR ( "&status=123" ));

So the php script on the server checks the password 'pwd' and then inserts the '123' from 'status', into the database.
That all works fine, but I need to get data from an analogue pin for the 'status'
The analogue data would be of type (int), and it seems I would need to turn that into a char[] array and feed that to the TCP buffer one byte at a time using a loop.

So how would I go about getting say the int 1023 into a char[] array?

I'm not even sure if that's the way to go. Like I said, this is pretty new to me.

If anyone has any ideas, I'd be glad of any help.

Many thanks.

2

you can try the itoa() function for integers, because you can use C code in your sketches...

example (untested code):

char buffer[5];
itoa(1023,buffer,DEC);
3

Wow, that was quick.

Dude you're a jedi :sunglasses:

Had a quick read up on itoa and done the business.

Here's what I did:

int value;
char data[5];

value=random(1023);
itoa(value, data, 10);

plen= es.ES_fill_tcp_data_p(buf, plen, PSTR ( "&status=" ));
for(i=0; data*!='\0'; i++){*
buf[TCP_DATA_P+plen]=data*;
_ plen++;_
_ }*_
Just used a random gen to test with, but I now have dynamic data filling my database.
Thanks.