UDP send/receive problems...

Projects Networking, Protocols, and Devices
1

Problem issues,

I have some trouble to communicate information using UDP

[UDPSendReceiveString,pde]
..
..
char ReplyBuffer[] = "acknowledged"; // a string to send back
...
...
Udp.beginPacket(Udp.remoteIP(), Udp.remotePort());
Udp.write(ReplyBuffer);
Udp.endPacket();
...
...

I would like to send float() to a PC program written in Processing over my LAN/WLAN and i have problems to send or convert my float variable in ReplyBuffer[] when I
try to convert data to string i get this errors

float tmp102temp = 22.34;
char ReplyBuffer[] = {tmp102temp};

The receiving end I get the following result "Vc" and if I try and mix something I get very strange result but i like to get a float or string, maybe a int or something that I can
use in my processing application.

Any tips and tricks are welcome to solve this problem

2

The Arduino compiler does not support float types in functions like sprintf() etc. But there is a solution. This topic covers it near the end of the posts.
http://arduino.cc/forum/index.php/topic,72682.0.html

3

I would like to send float() to a PC program

You want to send a function to a PC? You'll need a different name for the function, since float is a reserved keyword.

when I
try to convert data to string i get this errors

float tmp102temp = 22.34;
char ReplyBuffer[] = {tmp102temp};

I'm not surprised that you get errors. You are trying to stuff a 4-byte float into an 1 byte character.