next topic »

[on:]

I have an HTML line in a sketch:
client.println("GET /xml/current_obs/KVNY.xml HTTP/1.0");
I would like to put a array in for KVNY.

char* icao[]={"KVNY"};

setup() ...

loop() ...

client.println("GET /xml/current_obs/(icao[0].xml HTTP/1.0");

This addition compiles and uploads, but doesn't work.

[Reply #1 on:]

You might need to do something like below to get your array into the string you want to send.

client.println("GET /xml/current_obs/" + (icao[0]) + ".xml HTTP/1.0";

[Reply #2 on:]

Thanks, but that did not work.  It just inserted the + (icao[0]) + to the output.
Got to think about some more.

[Reply #3 on:]

Any particular reason why you want to use an array instead of a string?

[Reply #4 on:]

You're using cstrings, not String objects - the easiest way to do what you want would be sprintf.

Code:

char icao[]="KVNY";
// ...

char buf[strlen(icao) + 40]; // About 45 characters of buffer space
sprintf(buf, "GET /xml/current_obs/%s.xml HTTP/1.0", icao);
client.println(buf);

If you use a String object, the + operator will concatenate strings for you.

[Reply #5 on:]

zoomcat!

Great help. I don't think I've seen sprintf in Arduino examples, but it surely is in C.

Thanks

[Reply #6 on:]

The information output for the GET command does not need to be output all at once.

Code:

client.print("GET /xml/current_obs/");
client.print(icao);
client.println(.xml HTTP/1.0");

will output the data in icao as part of the GET command, without the overhead of a buffer and the sprintf code.