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Rove self-assemble kit question

After assembling the versalino rove self-assemble kit, observed that only one motor rotates in a timed manner (almost every 10 seconds).  Before starting the programming step, wanted to check if this is expected. Can you confirm ?

 

8 Answers

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Great observation, the Versalino Uno has a blink all program built in that blinks each pin a certain number of times in a row. What you are likely seeing is that blink all program triggering the motors.

Obviously once you put a different program on let me know if you have any issues, but I wouldn’t be too worried yet.

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Ok, I checked the blinkall program code, and all it does is write to the pins, so I would expect both motors to be equally powered.

To check this, I connected the 2nd motors wires to the opposite end of the wire-screw port  (working side), and I was able to see the motor move. So motor+wire is ok, I would suspect the port/circuit.

Only way I can confirm that both ports  are properly functional is to use a program that can independently drive both motors. Do you have such an example ? Please point me to it (newbie question).

 

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Ping! Is there any program I can use to independently drive both motors and test out my motorMaster board ? Otherwise I am stuck here with the full kit.

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I just built my kit and it works as expected.

Here is the link to the sample sketch.

Side note 1) before loading the sketch to the rover, double check the first few lines of code to make sure the MotorMaster and Sense & Move (Ultrasonic) buses are correct. In my case the MotorMaster is on BUSA and the Ultrasonic is on BUSB, which is opposite from the default rover sketch. A quick edit of the two lines corrected that.

Side note 2) don’t forget to download and install the Versalino, MotorMaster and Ultrasonic libraries from the Virtuabotix library page. Make sure you verify the sketch before transferring. If you have any errors in the console, go back and make sure the libraries are installed correctly.

Side note 2A) the libraries are compatible with Arduino IDE 1.0.x, and are not directly compatible with Arduino IDE 1.5.x. I used 1.0.5-r2 to load the sketch to rover. There are a few changes required to get the libraries to work with Arduino IDE 1.5.

Side note 3) after transferring the sketch to the rover and powering up the rover, it does nothing. A quick check of the source code reveals the sketch defaults to “direct control”. This means it is waiting for commands from the serial port. With the Versalino FTDI connected to the rover and PC, open the Arduino IDE serial monitor and after a second or two you should see “I Live.” in the serial monitor window. This means the sketch is loaded properly and running. Next carefully hold the rover in one hand (careful not to touch the wheels) and with the other hand type “w” and click send in the serial monitor. Both wheels should start spinning. Type “r” and hit send to stop the wheels.

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Ok, will check this today. Thanks a lot Brett.

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Confirmed this seems to work for the separate motors. The motormaster was on BUSB for my board.

Thanks for the pointers,  really appreciate the help.

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