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  1. questionHelp! My ROBOLAB 2.9 serial number doesn't work.
    ROBOLAB 2.9 is an upgrade product. The installer for ROBOLAB 2.9 asks that you enter the serial number from a previous version of ROBOLAB (2.0 - 2.5.4). The number is printed on your 2.5.4 or earlier CD or case. If you can't find your original packaging from your previous version of ROBOLAB, you ...

  2. questionHow do I use the mail command on the RCX?
    The RCX is always ready to receive mail which means that all you need to do to send a mail value is to wire in the send mail icon which can be found under RCX communications. The code below makes the RCX send a mail value of 85: Mail values can only be 0-255, and only one number can be held in ...

  3. questionWhy do I need to zero sensors and containers?
    Container values are global, meaning they are not automatically reset when a new or different program is opened. Sometimes there are values left in the containers and sensort from a previous program. Zeroing is a good way to ensure that any unwanted values have been cleared. The reset command s ...

  4. questionProgram a car to drive when the lights are off and stop when the lights are turned back on.
    One possible solution is below: ses

  5. questionWhat does it mean that the ROBOLAB 2.9 firmware is "100 times faster" than the old firmware?
    Firmware is the RCX or NXT operating system software. It is to your RCX or NXT what Microsoft Windows, Apple Macintosh, or any flavor of Linux is for your PC or Mac. Thus, it runs in the background as the platform for your user-written programs. Prior to the first time you program your NXT or RC ...

  6. questionHow do you program in ROBOLAB with an NXT rotation sensor in ports A-C?
    With the NXT, the rotation sensors are built into the motors, so they connect to the brick through ports A-C instead of ports 1-4. There are special icons in ROBOLAB to use when programming with the rotation sensors. In the NXT Commands category, there are icons called Encoder A, B, C and also i ...

  7. questionCan I use Bluetooth with the NXT in ROBOLAB 2.9?
    No, since ROBOLAB software does not currently support Bluetooth. KAB

  8. questionWhat do I need to know about wiring icons together in ROBOLAB?
    Here are some tips and tricks for wiring in ROBOLAB Inventor: It doesn’t matter what order your program icons are in; it is the order in which they are wired that matters: Dashed or broken wires indicate that the program is wired incorrectly. The best way to get rid of broken wires is to ...

  9. questionHow do you wire in a number (or constant)?
    Under modifiers there is a blue box labeled 'numeric constant'. (The name of this - and any other - tool should appear at the top of the toolbar.) Drag the numeric constant box to an appropriate location. Once the constant is placed on the screen, press the spacebar (to change to the wire to ...

  10. questionHow to use different sensor containers
    In order to do operations with various sensor values the first step is to get the sensor value into a container. There are lots of different fill container commands to use for different sensors. Fill container commands associated with sensors work exactly like regular fill container commands e ...

  11. questionHow do I save my data in ROBOLAB?
    In Investigator, after you have loaded your data, all you have to do to save it is save the investigator file. You can do this by selecting the File drop down menu at the top of the screen and then selecting Save. If you quit without saving, it will ask you if you want to save before letting yo ...

  12. questionHow can I plot frequency data from the NXT sound sensor?
    One of the ports for the sound sensor data logging icon (found in Investigator Level 5) is "flat response." To plot sound frequency range data rather than volume data, wire in "False" to this port from the Boolean palette. When the "Flat Response" port contains "True" (the default), then the sen ...

  13. questionI tried to use jumps and lands but nothing happened.
    Check to see if the JUMP and LAND icons are in the correct positions. The first thing that happens in the following program is that the JUMP icon tells the program to go directly to the LAND icon. This means that the middle of the program is bypassed and thus, the car never moves. The JUMP and ...

  14. questionConstruct a simple car using an angle sensor as a controller.
    Part 2: In Investigator level 5, program your car so that the motor speed (and direction) is determined by the angle sensor's value. The value of the angle sensor can be multiplied or divided for different levels of control. Part 3: Modify the program to include commands to log rotation sensor d ...

  15. questionDo Investigator icons appear in ROBOLAB Inventor Levels 4 and 5?
    Yes, Investigator icons do appear in ROBOLAB Inventor levels 4 and 5. The icons do not appear in ROBOLAB 2.5.4, however.

  16. questionAfter I installed ROBOLAB version 2.5.4 I got a message saying, "File not found."
    In some cases this can be related to the ROBOLAB 2.5.4 installation process not being finalized. Please reboot your PC and wait until your PC has fully loaded the Start programs before launching ROBOLAB 2.5.4. If you continue to have problems and are using Windows 98, or have had installation pr ...

  17. questionHow is direct RCX communication different than the remote program commands?
    The direct RCX communication command sends commands that are executed immediately. The reprogram commands that are sent are only executed after the run button has been pressed. Here is a good example of using both functions to send and execute a program on another RCX: AG ses

  18. questionHow do I use subroutines?
    Subroutines are parts of a program that only run when the green 'start subroutine' icon is used. Each subroutine is numbered, and each can be called upon to execute at any point during the program. It is important to note that as soon as the subroutine has ended, the program returns to the point ...

  19. questionWhere can I find more information about ROBOLAB?
    For general information about ROBOLAB software, please see Using ROBOLAB. Additional information about ROBOLAB, at a slightly more advanced level, is found in the ROBOLAB Reference Guide. The Help menu within 2.9 Inventor is the best place to go for questions about specific 2.9 icons. To access ...

  20. questionMy container function in ROBOLAB is not working.
    Make sure the correct containers are being referenced in the program. The program below does not work because the temperature sensor data is being put into the red container, but the program is waiting for the yellow container to equal 55 or greater. Container commands default to the red contai ...

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