Hi,

I am using Robot C 2.03 to program a Lego NXT. I am using the function SendMessageWithParm to send information via BT and I was wondering if there is a potential problem if I send a message with the value 65535.

The function documentation indicates that the 16-bit words should be in between -32767 and 32767. However 65535 is also a 16-bit word. When I try it it seems to work but I would like to know if there are potential issues with doing this.

Thanks

65535 will wrap around to -1, I believe. However, if the receiving robot knows beforehand that the incoming number will be positive, it can rewrite this information in a long variable. I f you need more help, you should probably post the code for both master and slave.

You are right when you say 65535 is a 16-bw, but it is a 16-b unsigned word. ROBOTC only calculates in signed values. 16-b signed words have the range of -32768 to 32767.