Using two different mailboxes, Bluetooth and NXT
Jay from Australia  [4 posts]
13 year
Hello Roborelm help forum,

I've built myself a self balancing robot with NXT and I've mounted an IP camera on it.  I'm trying to use TWO mailboxes to send two different driving commands via BT.  Ultimately, I want to tell my robot two pieces of information.

1. How far away an object is (using the CoG Box Size)
2. Which way to turn using CoG_X

I want to send the value of both of these variables to my robot using two different mailboxes.

To simulate this working, I've built a very basic RoboRelm program and NXC program containing only the BT communication (without a video feed) - but it works unexpectedly:

I can only get data from one mailbox and not the other.

I'm sending the number 8 to mailbox #1 and sending the number 20 to mailbox #2.  My program only shows number 8 and receives zero at mailbox #2.

Attached are my NXC and RoboRelm programs.

I've also tried putting some Timers in to make the program wait a while before reading the next mailbox in RoboRelm but they also don't seem to work...

Hoping someone can help me.



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