Trouble with the NXT Brick showing offline when programs selected to run (Archived)

[blt]

Update: This discussion applies to Issues from the 2010 FTC season and is no longer relevant for current FTC competition software.

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When the FCS system is brought online and one of the run programs is enabled (Auto or Tele-Op[basic or full]), our NXT shows that the brick is offline when one of the programs is enabled to run.  The brick shows good battery strength, but line voltage lists as 0.0 V.  Then of course,  the FCS system does not connect to the brick to run the program.

Does the team have the switchboards wired wrong?  Or is this another problem?

Thanks,

Team 2975

[MarkBlack]

BLT,

I am having trouble understanding the problem you are describing. 

• Does this behavior occur when using an unmodified template?
• Does this behavior occur when using the FTC Controller Station instead of the FCS?
• Can you describe what you mean by "switch board"?

[blt]

The template is unmodified

The "switchboard" is the regular unmodified Tetrix motor and servo black controllers that come with the FTC kit

And, the FCS system is the new one downloaded from FTC for 2010 competitions

[MarkBlack]

BLT,

Here are a few things I think you should look at.

• Ensure the named motor wired into the DC Motor input on the FTC Robot Status VI is referencing the correct same port your HiTechnic DC Motor controller is plugged into on the NXT brick.   The easiest way to check this is to enable the digital display on the named motor constant.  Right-click the named motor constant and select Visible Items»Digital Display.  A Value of 1111 corresponds to Port 1, Motor Controller 1, Motor 1, Reverse in the TETRIX Motor Configurator. 
• As per connecting to the FCS its probably a finicky Bluetooth connection that drives all of us nuts!  Assuming you are using Windows (even though this is not a bad things to try in Mac OS too) the best thing to try is open the Bluetooth control panel and remove all references to your NXT brick then attempt to connect to the brick through the Windows Bluetooth control panel.  Once it has been successfully paired, attempt the connection again in the FCS.

I hope this helps.  Please post back with any questions you may have!

Cheers and Good Luck,

Mark

LabVIEW R&D

[blt]

OK did what you said and I have the NXT brick showing line voltage of 13.8 volts; this is progress.

But,

The FCS, v. 1.0.0.7, cannot find the tele-op file to run; it is connected to the brick; the brick says disabled.  So what next?

I do have program chooser and the full vi on the brick.

Thanks,

Team 2975

[Smootastic]

Hi blt,

Did you run the Program Chooser and then select your Teleop program?  You may have to press the Update Filename button to locate the Teleop file if you ran the Program Chooser after connecting to the NXT in the FCS.  Also, when running the Program Chooser, check to see if the NXT displays an error occurred writing the FTCConfig.txt file.  I ran into that error earlier and I deleted the current FTCConfig.txt file and ran the Program Chooser again.

Kyle

FIRST Applications Engineer